Publications

Christos Zerefos started his scientific carrier as atmospheric scientist in the 1970s. He became known to the scientific community for his studies on the long and short term variability of the ozone layer, the stratosphere and related geophysical signals in a global perspective. The relation between solar activity and the lower stratosphere, e.g. his paper with Paul Crutzen “Stratospheric thickness variation over the northern hemisphere ….” (JGR, 1975) was one of the first studies to model the Physics of the solar activity component in the lower stratosphere. Working with Harry van Loon and other colleagues, they first observed the El Nino signals in the lower stratosphere ("The southern oscillation in the stratosphere", Mon. Weather Rev., 1982) and in the columnar ozone (“On the relative importance of QBO and El Nino in the revised Dobson total ozone records”, JGR, 1992). His early papers on long term trends in stratospheric temperatures and total ozone started in the late 70s and peaked in the early 90s with perhaps one of his most important paper with Richard Stolarski “Measured trends in stratospheric ozone”, published in Science (1992). That paper provided the scientific basis for the strengthening of the phase out of halocarbons. In this work Zerefos played a key role in analyzing ground based data. Very recently long-term trends from the lower troposphere to the lower stratosphere have been revisited in Zerefos et al. paper in ACP (2014).

In the 80s and 90s his papers on the inverse relationship between ozone and UV-B, provided for the first time solid evidence that UV-B had significant positive trends. Well-cited papers are: “A note on the recent increase of solar UV-B over northern mid latitudes”, GRL, 1995, “Optical properties of tropospheric aerosols …, Appl. Optics, 1997, "Spectral measurements of solar UVB radiation and its relations to total ozone, SO2, and clouds", JGR, 1993 as well as his papers on record low total ozone anomalies and the effects of volcanic eruptions (e.g. with Bojkov “Record low total ozone during northern winters of 1992 and 1993", GRL 1993). Also in the 80s and 90s Zerefos pioneered in establishing in Greece regular well calibrated observations of UV spectral irradiance and ozone. He made use of the first Brewer MKI to be operating outside of Canada (Brewer #5). Also in the 90s has pioneered in the establishment of the European UV-B observing network started from his initiative with Anne Webb, Alkis Bais and late Heinz Ott. He has also supported the use of the Brewer spectroradiometer which became a model instrument to measure not only columnar ozone and SO2 but also UV spectral irradiances. Notable are papers with Bais and McElroy such as “Solar UV-B with the double and single Brewer ozone spectrophotometers”, GRL, 1996 and “Correcting global solar ultraviolet spectra recorded by a Brewer spectroradiometer for its angular response error", Appl. Optics, 1998. In the 90s Zerefos has organized large EU-funded campaigns to study the complex processes of ozone- aerosol-radiation interactions in the Mediterranean (PAUR Campaigns, I, II, MEDCAPHOT Campaign with Ziomas). These campaigns produced well-cited papers, e.g. “The effect of aerosols on solar UV irradiances during the photochemical activity and solar ultraviolet radiation campaign” with Kylling “The optical properties of tropospheric aerosols determined by Lidar and spectrophotometric measurements (PAUR Campaign)” with Marenco and others. In the 2000s has participated in the MATCH Campaigns joining the European group led by Rex, Schultz and others which studied ozone loss rates inside and outside of the polar vortex (JGR, 2001; GRL, 2000, 2006). On another collaborative project with Stohl et al., studied and reviewed mechanisms of stratosphere-troposphere exchange (JGR, 2003).

In the past 20 years has acted as author, contributor or reviewer in most of the WMO/UNEP Scientific Assessments of Ozone Depletion, which produced well-cited papers on ozone and UV-B trends, e.g. with Harris “Trends in stratospheric and free tropospheric ozone, JGR “Variability of UV-B at four Stations in Europe, GRL, 1997, “Quasi-biennial and longer-term changes in clear sky UV-B solar irradiance", GRL, 1998, “Further studies on possible volcanic signal to the ozone layer”, JGR, 1994. He has discovered with his colleagues the effects in the stratosphere of the solar eclipses of 1999 (JGR, 2000) and 2006 (ACP, 2007, 2008) presenting evidence of atmospheric gravity waves following the supersonic transport of the moon’s shadow in the ozone layer.

Has served as review Editor of Chapter 5 of the IPCC Aviation Report (1998) and as Reviewer of the IPCC Special Report on Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation (2013). His involvement in the estimates of radiative forcing from aviation resulted to the paper with Sausen and Isaksen “Aviation radiative forcing in 2000: An update on IPCC”, Met. Z., 2005. Other notable papers that had received attention by the scientific community include the papers “Solar activity-total column ozone relationships: Observations and model studies with heterogeneous chemistry”, JGR, 1997, “Tropospheric ozone changes at unpolluted and semi polluted regions induced by stratospheric ozone changes”, JGR, 2005 with Isaksen, ”Evidence of the impact of aviation on cirrus cloud formation“, Atmos. Chem. Phys., 2003, “Solar dimming and brightening over Thessaloniki, Greece, and Beijing, China”, Tellus B, 2009 and a number of well-received papers as seen in his most cited list of papers. Recently he is analysing data to detect turn around in the ozone and UV-B trends following the phase out of manmade chlorofluorocarbons (e.g. “Evidence of a possible turning point in solar UV-B over Canada, Europe and Japan”, ACP, 2012). Finally, his pioneering work on the use of Red-to-green ratios to detect aerosol in paintings by great masters (Zerefos et al, 2007, 2014) as well as his co-authoring work with J. Luterbacher on the European summer temperatures since Roman times (Environ. Res. Lett., 2016), are being widely discussed in scientific and mass media globally. Some of the above papers have been selected as hot spots by the editors of prestigious scientific journals.


List of selected recent articles in peer reviewed journals:


• Luterbacher J., J.P. Werner, J.E. Smerdon, L. Fernández-Donado, F.J. González-Rouco, D. Barriopedro, C. Ljungqvist, U. Büntgen, E. Zorita, S. Wagner, J. Esper, D. McCarroll, A. Toreti, D. Frank, J.H. Jungclaus, M. Barriendos, C. Bertolin, O. Bothe, R. Brázdil, D. Camuffo, P. Dobrovolný, M. Gagen, E. García-Bustamante, Q. Ge, J.J. Gómez-Navarro, J. Guiot, Z. Hao, G.C. Hegerl, K. Holmgren, V.V. Klimenko, J. Martín-Chivelet, C. Pfister, N. Roberts, A. Schindler, A. Schurer, O. Solomina, L. von Gunten, E. Wahl, H. Wanner, O. Wetter, E. Xoplaki, N. Yuan, D. Zanchetti, H. Zhang and C. Zerefos, “European summer temperatures since Roman times”, Environ. Res. Lett. 11, 024001, 2016.
• Katragkou, E., P. Zanis, A. Tsikerdekis, J. Kapsomenakis, D. Melas, H. Heskes, J. Flemming, V. Huijnen, A. Inness, M.G. Schultz, O. Stein, C.S. Zerefos “Evaluation of near surface ozone over Europe from the MACC reanalysis”, Geosci. Model Dev., 8, 2299-2314, 2015.
• Poupkou, A., K. Markakis, N. Liora, T. Giannaros, P. Zanis, U. Im, N. Daskalakis, S. Myriokefalitakis, J. Kaiser, D. Melas, M. Kanakidou, T. Karacostas, C. Zerefos, “A modeling study of the impact of the 2007 Greek forest fires on the gaseous pollutant levels in the Eastern Mediterranean”, Atmosph. Res., 148, 1-17, 2014.
• Zerefos, C. S., K. Tourpali, P. Zanis, K. Eleftheratos, C. Repapis, A. Goodman, D. Wuebbles, I. S. A. Isaksen, J. Luterbacher, “Evidence for an earlier greenhouse cooling effect in the stratosphere before the 1980s over the Northern Hemisphere”, Atmos. Chem. Phys., 14, 7705-7720, 2014.
• Zerefos, C. S., P. Tetsis, A. Kazantzidis, V. Amiridis, S. C. Zerefos, J. Luterbacher, K. Eleftheratos, E. Gerasopoulos, S. Kazadzis, A. Papayannis, “Further evidence of important environmental information content in red-to-green ratios as depicted in paintings by great masters”, Atmos. Chem. Phys., 14, 2987–3015, 2014. Selected as “Research Spotlight" by the Editors of the Journal.
• Vrekoussis, M., A. Richter, A. Hilboll, J. Burrows, E. Gerasopoulos, J. Lelieveld, L. Barrie, C. Zerefos, N. Mihalopoulos “Economic Crisis Detected from Space: Air Quality observations over Athens/Greece”, GRL, Vol. 40, 1-6, doi: 10.1002/grl.50118, 2013.
• Inness, A., Baier, F., Benedetti, A., Bouarar, I., Chabrillat, S., Clark, H., Clerbaux, C., Coheur, P., Engelen, R. J., Errera, Q., Flemming, J., George, M., Granier, C., Hadji-Lazaro, J., Huijnen, V., Hurtmans, D., Jones, L., Kaiser, J. W., Kapsomenakis, J., Lefever, K., Leitão, J., Razinger, M., Richter, A., Schultz, M. G., Simmons, A. J., Suttie, M., Stein, O., Thépaut, J.-N., Thouret, V., Vrekoussis, M., Zerefos, C., and the MACC team: The MACC reanalysis: an 8 yr data set of atmospheric composition, Atmos. Chem. Phys., 13, 4073-4109, doi:10.5194/acp-13-4073-2013, 2013.
• Isaksen, I., C. Zerefos, W.-C. Wang, D. Balis, K. Eleftheratos, B. Rognerud, F. Stordal, T.K. Berntsen, J.H. LaCasce, O.A. Søvde, D. Olivié, Y.J. Orsolini, I. Zyrichidou, M. Prather, O.N.E. Tuinder, “Attribution of the Arctic ozone column deficit  in March 2011”, Geo. Res. Lett., Vol. 39, L24810, doi:10.1029/2012GL053876, 2012.
• Zyryanov, D, G. Foret, M. Eremenko, M. Beekmann, J.-P. Cammas, M. D'Isidoro, H. Elbern, J. Flemming, E. Friese, I. Kioutsioutkis, A. Maurizi, D. Melas, F. Meleux, L. Menut, P. Moinat, V.-H. Peuch, A. Poupkou, M. Razinger, M. Schultz, O. Stein, A. M. Suttie, A. Valdebenito, C. Zerefos, G. Dufour, G. Bergametti, and J.-M. Flaud, “3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model”, Atmos. Chem. Phys., 12, 3219-3240, 2012.
• Balis, D., I.S.A. Isaksen, C. Zerefos, I. Zyrichidou, K. Eleftheratos, K. Troupali, R. Bojkov, B. Rognerud, F. Stordal, O.A. Sovde, Y. Orsolini, “Observed and Modelled record ozone decline over the Arctic during winter/spring 2011”, Geophys. Res. Lett., Vol. 38, L23801, 5 pp., doi:10.1029/2011GL049259, 2011.
• Romanou, A., G. Tselioudis, C.S. Zerefos, C.A. Clayson, J.A. Curry, A. Andersson, “Evaporation-Precipitation Variability over the Mediterranean and the Black Seas from Satellite and Reanalysis Estimates”, J. of Climate, 23, 5268-5287, 2010.
• Kuglitsch, F.G., A. Toreti, E. Xoplaki, P.M. Della-Marta, C.S. Zerefos, M. Türkes, J. Luterbacher “Heat wave changes in the eastern Mediterranean since 1960”, Geo. Res. Lett., 37, L04802, doi: 10.1029/2009GL041841, 2010. Selected as “Research Spotlight" from the American Geophysical Union (AGU).


Major Reports


• Eleftheratos, K., … C. Zerefos, “Manmade changes in cirrus clouds from 1984 to 2007: A preliminary study”, Chapter 61 in Energy, Transportation and Global Warming, Green Energy and Technology, P. Grammelis (ed.), DOI 10.1007/978-3-319-30127-3_61, © Springer International Publishing Switzerland 2016, pp. 827-836, 2016.
• Inness, A., ….. C.S. Zerefos: Data assimilation of satellite retrieved ozone, carbon monoxide and nitrogen dioxide with ECMWF’s Composition-IFS, ECMWF Tech Memo number 745 2014.
Trends in extreme weather events in Europe: implications for national and EU adaptation strategies, EASAC Policy Report 22, ISBN 978-3-8047-3239-1 (2013) by Øystein H., ...., C. Zerefos, ....
Extreme Weather Events in Europe: preparing for climate change adaptation, Norwegian Met. Institute, NILU, ISBN 978-82-7144-100-5 (2013) by Øystein Hov, ..., Christos Zerefos, ....
• Kallos, G. ... C. Zerefos, Chapter 4: Mechanisms of Climate Variability, Air Quality & Impacts of Atmospheric Constituents in the Med. Region, in: A. Navara and L. Tubiana (Eds), Vol. 1: Air, Sea and Precipitation and Water, Springer, 2013.
• Luterbacher, J., ... C. S. Zerefos, and E. Zorita,: A review of 2000 years of paleoclimatic evidence in the Mediterranean. In: Lionello, P. (Ed.), The Climate of the Mediterranean region: From the Past to the Future. Elsevier, Amsterdam, The Netherlands, pp. 87-185, 2012.
• Bais, A.F., ... C. Zerefos, ... WMO Scientific Assessment of Ozone Depletion, Chapter 7: Surface Ultraviolet Radiation: Past, Present and Future, 2007.
• Luterbacher, J., ... C. Zerefos, S. De Zolt, P. Lionello, “Mediterranean Climate Variability Over the Last Centuries: A Review”, Chapter 1, in: The Mediterranean Climate, (Eds. P. Lionello, P. Malanotte-Rizzoli and R. Boscolo), Elsevier, 27-148, 2006.
• Granier, C., ... C. Zerefos, Chapter 5: “Impact of climate change on tropospheric ozone”, In: Ozone-climate interactions, Ed. I.S.A. Isaksen, EC Air Pollution Research Report No. 81, p. 97-114, Brussels, 2003.
• Bregman, B., ... C. Zerefos, Chapter 2: “The effect of stratospheric ozone changes in climate”, In: Ozone-climate interactions, Ed. I.S.A. Isaksen, EC Air Pollution Research Report No. 81, p. 33-51, Brussels, 2003.
• Kerr, J.B., ... C.S. Zerefos, WMO Report No 47, Scientific Assessment of Ozone Depletion: 2002, Chapter 5: Surface Ultraviolet Radiation: Past and Future, p. 5.1-5.46, Geneva, 2002.
• Herman, J.R., ... C.S. Zerefos, WMO Report No 44, Scientific Assessment of Ozone Depletion: 1998, Chapter 9:Ultraviolet Radiation at the Earth’s Surface, p. 9.1-9.46, Geneva, 1998.
• Bojkov, R.D., ... C.S. Zerefos, WMO Report No 44, Scientific Assessment of Ozone Depletion: 1998, Chapter 4:Ozone Variability and Trends, p. 4.1-4.55, Geneva, 1998.
• Simon, P.S., C.S. Zerefos, ... “UV Radiation at the Earth’s Surface”, In: European Research in the Stratosphere, Office for Official Publications of EU, EU, EUR 16986, p. 171-200, Brussels, 1997.
• Harris, N.R.P., ...C.S. Zerefos, WMO Report No 37, Scientific Assessment of Ozone Depletion: 1994, Chapter I: Ozone Measurements, p. 1.1-1.54, Geneva, 1994.
• Stolarski, R., L. ... C.S. Zerefos, WMO Report No. 25, Scientific Assessment of O3 Depletion: 1991, Chapter 2: Ozone and Temperature Trends, p. 2.1-2.33, Geneva, 1991.


Books


Twenty Years of Ozone Decline, C. Zerefos, G. Skalkeas, G. Contopoulos (eds.), Springer, 2009. • Introductory Courses in Atmospheric Physics, C. Zerefos, Patakis Editions, pp 214, 2009 (in Greek). • Atmosphere, C. Zerefos, Hellenic Open University, pp 228, Patras, Greece, 2004 (in Greek). • Ozone, C. Zerefos (ed), IOC publ., 1037 pages, 2004. • Chemistry and Radiation Changes in the Ozone Layer, Zerefos., C., I. Isaksen and I. Ziomas (eds), Kluwer, pp. 398, 2000. • Eastern Europe and Global Change, European Union, Ghazi, A., P. Mathy, C. Zerefos (eds.), Office for Official Publications of the European Communities, pp 292, 1997. • Solar Ultraviolet Radiation, Measurement, Modeling and Effects, Zerefos., C., A.F. Bais) (eds), Springer Verlag, pp 324, 1997. • Atmospheric Ozone, Ghazi A., C. Zerefos (eds.), Reidel Publ. Co., pp 400, 1985. • Courses in Atmospheric Environmental Physics, AUTH University Press, 1984 (in Greek). • Introduction to Atmospheric Physics, AUTH University Press, 1982 (in Greek).

Other publications include books in Reidel, Springer and Kluwer and papers in Conference proceedings.


Papers in peer reviewed scientific journals


The refereed journals include journals with large impact factor, among which (alphabetically) are: Atmospheric Chemistry and Physics, Climate Change, Geophysical Research, Geophysical Research Letters, Journal of Climate, Nature and Science.

• Zerefos, C. S., K. Eleftheratos, J. Kapsomenakis, S. Solomos, A. Inness, D. Balis, A. Redondas, H. Eskes, V. Amiridis, C. Repapis, M. Allaart, R. Engelmann, A. Dahlback, V. De Bock, H. Diémoz, P. Eriksen, J. Gröbner, A. Heikkilä, J. Jarosławski, W. Josefsson, T. Karppinen, U. Köhler, C. Meleti, C. Repapis, J. Rimmer, V. Savinykh, V. Shirotov, A. M. Siani, A. R. D. Smedley, M. Stanek, and R. Stübi, Detecting volcanic sulfur dioxide plumes in the Northern Hemisphere using the Brewer spectrophotometer, other networks, and satellite observations, Atmos. Chem. Phys., 17, 551–574, 2017.
• Diémoz, H., K. Eleftheratos, S. Kazadzis, V. Amiridis, and C. S. Zerefos, Retrieval of aerosol optical depth in the visible range with a Brewer spectrophotometer in Athens, Atmos. Meas. Techn., 9, 1871-1888, doi:10.5194/amt-9-1871-2016, 2016.
• Hassinen, S., D. Balis, H. Bauer, M. Begoin, A. Delcloo, K. Eleftheratos, S. Gimeno Garcia, J. Granville, M. Grossi, N. Hao, P. Hedelt, F. Hendrick, M. Hess, K.-P. Heue, J. Hovila, H. Helge Jønch-Sørensen, N. Kalakoski, M. Koukouli, J. Kujanpää, J.-C. Lambert, C. Lerot, D. Loyola, A. Määttä, G. Pinardi, F. Romahn, M. van Roozendael, R. Lutz, I. De Smedt, P. Stammes, W. Steinbrecht, J. Tamminen, N. Theys, L. G. Tilstra, O. N. E. Tuinder, P. Valks, C. Zerefos, W. Zimmer, and E. Zyrichidou “Overview of the O3M SAF GOME-2 operational atmospheric composition and UV radiation data products and data availability”, Atmos. Meas. Techn., 9, 383-407, 2016.
• Luterbacher, J., J P Werner, J E Smerdon, L Fernández-Donado, F J González-Rouco, D. Barriopedro, FC Ljungqvist, U. Büntgen, E. Zorita, S. Wagner, J. Esper, D. McCarroll, A. Toreti, D. Frank, J.H. Jungclaus, M. Barriendos, C. Bertolin, O. Bothe, R. Brázdil, D. Camuffo, P. Dobrovolný, M. Gagen, E. García-Bustamante, Q. Ge, J.J. Gómez-Navarro, J. Guiot, Z. Ha, G.C. Hegerl, K. Holmgren,V.V. Klimenko, J. Martín-Chivelet, C. Pfister, N. Roberts, A. Schindler, A. Schurer, O. Solomina, L. von Gunten, E. Wahl, H. Wanner, O. Wetter, E. Xoplaki, N. Yuan, D. Zanchettin, H. Zhang, C. Zerefos, “European summer temperatures since Roman times”, Environ. Res. Lett. 11, doi:10.1088/1748-9326/11/2/024001, 2016.
• Dafka, S., E. Xoplaki, A. Toreti, P. Zanis, E. Tyrlis, C. Zerefos, J. Luterbacher “The Etesians: from observations to reanalysis”, Climate Dynamics, DOI: 10.1007/s00382-01502920-7, 2015.
• Eskes, H., V. Huijnen, A. Arola, A. Benedictow, A.-M. Blechschmidt, E. Botek, O. Boucher, I. Bouarar, S. Chabrillat, E. Cuevas, R. Engelen, H. Flentje, A. Gaudel, J. Griesfeller, L. Jones, J. Kapsomenakis, E. Katragkou, S. Kinne, B. Langerock, M. Razinger, A. Richter, M. Schultz, M. Schulz, N. Sudarchikova, V. Thouret, M. Vrekoussis, A. Wagner, and C. Zerefos, “Validation of reactive gases and aerosols in MACC global analysis and forecast system”, Geosci. Model Dev., 8, 3523-3543, 2015.
• Founda, D., F. Pierros, M. Petrakis, C. Zerefos, “Interdecadal variations and trends of the Urban Heat Island in Athens (Greece) and its response to heat waves”, Atmos. Res., 161-162, 2015.
• Inness A., A.-M. Blechschmidt, I. Bouarar, S. Chabrillat, M. Crepulja, R. J. Engelen, H. Eskes, J. Flemming, A. Gaudel, F. Hendrick, V. Huijnen, L. Jones, J. Kapsomenakis, E. Katragkou, A. Keppens, B. Langerock, M. de Mazière, D. Melas, M. Parrington, V. H. Peuch, M. Razinger, A. Richter, M. G. Schultz, M. Suttie, V. Thouret, M. Vrekoussis, A. Wagner, and C. Zerefos, “Data assimilation of satellite-retrieved ozone, carbon monoxide and nitrogen dioxide with ECMWF’s Composition-IFS”, Atmos. Chem. Phys., 15, 5275–5303, 2015.
• Kalabokidis, K., P. Palaiologou, E. Gerasopoulos, C. Giannakopoulos, E. Kostopoulou and C. Zerefos, “Effect of climate change projections on forest fire behavior and values-at-risk in southwestern Greece”, Forests, 6(6): 2214-2240, 2015.
• Katragkou, E., P. Zanis, A. Tsikerdekis, J. Kapsomenakis, D. Melas, H. Heskes, J. Flemming, V. Huijnen, A. Inness, M.G. Schultz, O. Stein, C.S. Zerefos “Evaluation of near surface ozone over Europe from the MACC reanalysis”, Geosci. Model Dev., 8, 2299-2314, 2015.
• Raptis, P.I., S. Kazadzis, K. Eleftheratos, P. Kosmopoulos, V. Amiridis, C. Helmis, C. Zerefos, “Total Ozone Column Measurements using an Ultraviolet Multifilter Radiometer”, Inter. J. of Rem. Sens., 36:17, 4469-4482, DOI: 10.1080/01431161.2015.1083631, 2015.
• Voloudakis, D., A. Karamanos, , G. Economou, D. Kalivas, P. Vahamidis, V. Kotoulas, J. Kapsomenakis C. Zerefos, “Prediction of climate change impacts on cotton yields in Greece under eight climatic models using the AquaCrop crop simulation model and discriminant function analysis”. Agricultural Water Management, 147, 116-128, 2015.
• Wagner, A., A.M. Blechschmidt, I. Bouarar, E.G. Brunke, C. Lerbaux, M. Cupeiro, P. Cristofanelli, H. Eskes, J. Flemming, H. Flentje, M. George, S. Gilge, A. Hilboll, A. Inness, J. Kapsomenakis, A. Richter, L. Ries, W. Spangl, O. Stein, R. Weller, C. Zerefos “Evaluation of the MACC operational forecast system potential and challenges of global near-real-time modelling with respect to reactive gases in the troposphere”, Atmos. Chem. Phys, 14005-14030, http://www.atmos-chem-phys.net/15/14005/2015/, doi: 10.5194/acp-15-14005-2015.
• Eleftheratos, K., S. Kazadzis, C. S. Zerefos, K. Tourpali, C. Meleti, D. Balis, I. Zyrichidou, K. Lakkala, U. Feister, T. Koskela, A. Heikkilä, J. M. Karhu, "Ozone and spectroradiometric UV changes in the past 20 years over middle and high latitudes", Atmosphere-Ocean, doi: 10,1080/07055900.2014.919897, 2014.
• Isaksen, I. S. A., T. K. Berntsen, S. B. Dalsøren, K. Eleftheratos, Y. Orsolini, B. Rognerud, F. Stordal, O. A. Søvde, C. Zerefos, C. D. Holmes, “Atmospheric Ozone and Methane in a Changing Climate”, Atmosphere, 5, 518-535; doi:10.3390/atmos5030518, 2014.
• Kourtidis, K., S. Rapsomanikis, C. Zerefos, A.K. Georgoulias, E. Pavlidou, “Severe particulate pollution from the deposition practices of the primary materials of a cement plant”, Environ. Science & Poll. Res., doi: 10.1007/s11356-014-2696-6, 2014.
• Mitsakis, E., A. Papanikolaou, G. Ayfadopoulou, J. Salanova, C. Doll, G. Giannopoulos, C. Zerefos, «An integrated framework for linking climate change impacts to emergency adaptation strategies for transport networks”, Eur. Transp. Res. Rev., 6:103-111, doi: 10.1007/s12544-013-0114-0, 2014.
• Poupkou, A., K. Markakis, N. Liora, T. Giannaros, P. Zanis, U. Im, N. Daskalakis, S. Myriokefalitakis, J. Kaiser, D. Melas, M. Kanakidou, T. Karacostas, C. Zerefos, “A modeling study of the impact of the 2007 Greek forest fires on the gaseous pollutant levels in the Eastern Mediterranean”, Atmosph. Res., 148, 1-17, 2014.
• Zerefos, C. S., K. Tourpali, P. Zanis, K. Eleftheratos, C. Repapis, A. Goodman, D. Wuebbles, I. S. A. Isaksen, J. Luterbacher, “Evidence for an earlier greenhouse cooling effect in the stratosphere before the 1980s over the Northern Hemisphere”, Atmos. Chem. Phys., 14, 7705-7720, 2014.
• Zerefos, C. S., P. Tetsis, A. Kazantzidis, V. Amiridis, S. C. Zerefos, J. Luterbacher, K. Eleftheratos, E. Gerasopoulos, S. Kazadzis, A. Papayannis, “Further evidence of important environmental information content in red-to-green ratios as depicted in paintings by great masters”, Atmos. Chem. Phys., 14, 2987–3015, 2014. Selected as “Research Spotlight" by the Editors of the Journal.
• Aggelis, D., P. Zanis, C. Zerefos, A.F. Bais, P. Nastos, “Mapping of surface ozone seasonality and trends across Europe during 1997-2006 through kriging interpolation to observational data», Water, Air & Soil Poll., Vol. 224 (4), art. no. 1501, doi: 10.1007/s11270-013-1501-9, 2013.
• Eleftheratos, K., I. Isaksen, C. Zerefos, P. Nastos, K. Tourpali, B. Rognerud, “Ozone variations derived by a chemical transport model”, Water, Air & Soil Poll., Vol. 224 (6), art. no. 1585, 2013.
• Inness, A., Baier, F., Benedetti, A., Bouarar, I., Chabrillat, S., Clark, H., Clerbaux, C., Coheur, P., Engelen, R. J., Errera, Q., Flemming, J., George, M., Granier, C., Hadji-Lazaro, J., Huijnen, V., Hurtmans, D., Jones, L., Kaiser, J. W., Kapsomenakis, J., Lefever, K., Leitão, J., Razinger, M., Richter, A., Schultz, M. G., Simmons, A. J., Suttie, M., Stein, O., Thépaut, J.-N., Thouret, V., Vrekoussis, M., Zerefos, C., and the MACC team: The MACC reanalysis: an 8 yr data set of atmospheric composition, Atmos. Chem. Phys., 13, 4073-4109, doi:10.5194/acp-13-4073-2013, 2013.
• Vrekoussis, M., A. Richter, A. Hilboll, J. Burrows, E. Gerasopoulos, J. Lelieveld, L. Barrie, C. Zerefos, N. Mihalopoulos “Economic Crisis Detected from Space: Air Quality observations over Athens/Greece”, GRL, Vol. 40, 1-6, doi: 10.1002/grl.50118, 2013.
• Amiridis, V., C. Zerefos, S. Kazadzis, E. Gerasopoulos, K. Eleftheratos, M. Vrekoussis, A. Stohl, R.E. Mamouri, P. Kokkalis, A. Papayannis, K. Eleftheriadis, E. Diabouli, I. Keramitsoglou, C. Kontoes, V. Kotroni, K. Lagouvardos, E. Marinou, E. Giannakaki, E. Kostopoulou, C. Giannakopoulos, A. Richter, J.P. Burrows and N. Mihalopoulos, “Impact of the 2009 Attica wild fires on the air quality in urban Athens”, Atmos. Envir., doi: 10.1016/j.atmosenv.2011.07.056, 2012.
• Isaksen, I., C. Zerefos, W.-C. Wang, D. Balis, K. Eleftheratos, B. Rognerud, F. Stordal, T.K. Berntsen, J.H. LaCasce, O.A. Søvde, D. Olivié, Y.J. Orsolini, I. Zyrichidou, M. Prather, O.N.E. Tuinder, “Attribution of the Arctic ozone column deficit  in March 2011”, Geophys. Res. Lett., Vol. 39, L24810, doi:10.1029/2012GL053876, 2012.
• Zerefos, S.C, K. Tourpali, K. Eleftheratos, S. Kazadzis, C. Meleti, U. Feister, T. Koskela, and A. Heikkil¨a, “Evidence of a possible turning point in solar UV-B over Canada, Europe and Japan”, Atmos. Chem. Phys., 12, 2469–2477, 2012.
• Zyryanov, D, G. Foret, M. Eremenko, M. Beekmann, J.-P. Cammas, M. D'Isidoro, H. Elbern, J. Flemming, E. Friese, I. Kioutsioutkis, A. Maurizi, D. Melas, F. Meleux, L. Menut, P. Moinat, V.-H. Peuch, A. Poupkou, M. Razinger, M. Schultz, O. Stein, A. M. Suttie, A. Valdebenito, C. Zerefos, G. Dufour, G. Bergametti, and J.-M. Flaud, “3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model”, Atmos. Chem. Phys., 12, 3219-3240, 2012.
• Balis, D., I.S.A. Isaksen, C. Zerefos, I. Zyrichidou, K. Eleftheratos, K. Troupali, R. Bojkov, B. Rognerud, F. Stordal, O.A. Sovde, Y. Orsolini, “Observed and Modelled record ozone decline over the Arctic during winter/spring 2011”, Geophys. Res. Lett., Vol. 38, L23801, 5 pp., doi:10.1029/2011GL049259, 2011.
• Eleftheratos, K., C. Zerefos, E. Gerasopoulos, I. Isaksen, B. Rognerud, S. Dalsøren, C. Varotsos “A note on the comparison between total ozone from Oslo CTM2 and SBUV satellite data”, Int. J. of Rem. Sens., 32: 9, 2535-2545, 2011.
• Eleftheratos, K., C.S. Zerefos, and C. Varotsos, “Interannual variability of cirrus clouds in the tropics at ENSO regions based on ISCCP satellite data”, Int. J. of Rem. Sens., doi: 10.1080/01431161.2010.510491, 2011.
• Gerasopoulos, E., V. Amiridis, S. Kazadzis, P. Kokkalis, K. Eleftharatos, M.O. Andreae, T.W. Andreae, H. El-Askary, C.S. Zerefos, “Three-year ground based measurements of Aerosol Optical Depth over the Eastern Meditterranean: the urban environment of Athens”, Atmos. Chem. Phys., 11, 2145-2159, 2011.
• Kazantzidis, A., K. Eleftheratos, C.S. Zerefos “Effects of cirrus cloudiness on solar irradiance in four spectral bands”, Atm. Res., 102, 452-459, 2011.
• Nastos, P.T., C.M. Philandras, D. Founda, C.S. Zerefos, ”Air temperature trends related to changes in atmospheric cirulation in the wider area of Greece”, Int. J. of Rem. Sens., Vol. 32, 3, 737-750, doi:10.1080/01431161.2010.517796, 2011.
• Philandras, C.M., P.T. Nastos, J. Kapsomenakis, K.C. Douvis, G. Tselioudis, C.S. Zerefos, “Long term precipitation trends and variability within the Mediterranean region”, Nat. Hazards Earth Syst. Sci., 11, 3235-3250, 2011.
• Poupkou, A., P. Nastos, D. Melas, C. Zerefos, “Discomfort Index and Air Quality Index in a large urban Mediterranean Agglomeration”, Water, Air & Soil Poll., Vol. 22 (1-4_, pp. 163-183, doi: 10.1007/s11270-011-0814-9, 2011.
• Poupkou, A., P. Zanis, P. Nastos, D. Papanastasiou, D. Melas, K. Tourpali, C. Zerefos “Present climate trend analysis of the Etesian winds in the Aegean Sea”, Theor. Appl. Climatol., DOI 10.1007/s00704-011-0443-7, 2011.
• Tselioudis, G., C. Douvis, C. Zerefos “Does dynamical downscaling introduce novel information in climate model simulations of precipitation change over a complex topography region?”, Int. J. Climatol., doi: 10.1002/joc.2360, 2011
• Amiridis, V., E. Giannakaki, D.S. Balis, I. Pytharoulis, P. Zanis, E. Gerasopoulos, S. Kazadzis, D. Melas, C. Zerefos, “Smoke injection heights from agricultural burning in Eastern Europe as seen by CALIPSO”, Atm. Chem. & Phys. , 10, 11567-11576, 2010.
• Eleftheratos, Κ., G. Tselioudis, C. Zerefos, P. Nastos, C. Douvis & I. Kapsomenakis “Observed and predicted climate changes in Uruguay and adjacent areas”, Hellenic Journal of Geosciences, vol. 45, 83-90, 2010.
• Giannakaki, E., D. Balis, V. Amiridis, C. Zerefos, “Optical properties of different aerosol types: seven years of combined Raman-elastic backscatter lidar measurements in Thessaloniki, Greece”, Atmos. Meas. Tech., 3, 569-578, 2010.
• Giannakopoulos, C., P. Hadjinicolaou, E. Kostopoulou, K.V. Varotsos, C. Zerefos “Precipitation and temperature regime over Cyprus as a result of global climate change”, Adv. Geosci., 23, 17-24, 2010.
Hadjinicolaou, P., C. Zerefos, M.A. Lange, S. Pashiardis, J. Lelieveld, “Mid-21st century climate and weather extremes in Cyprus as projected by six regional climate models”, Reg. Environ. Change, doi: 10.1007/s10113-010-0153-1, 2010.
• Huijnen, V., H.J. Eskes, A. Poupkou, H. Elbern, K.F. Boersma, G. Foret, M. Sofiev, A. Valdebenito, J. Flemming, O. Stein, A. Gross, L. Robertson, M. D’Isidoro, I. Kioutsioukis, E. Friese, B. Amstrup, R. Bergstrom, A. Strunk, J. Vira, D. Zyryanov, A. Maurizi, D. Melas, V.H. Peuch, C. Zerefos, “Comparison of OMI NO2 tropospheric columns with an ensemble of global and European regional air quality models”, Atmos. Chem. Phys., 10, 3273-3296, 2010.
• Kuglitsch, F.G., A. Toreti, E. Xoplaki, P.M. Della-Marta, C.S. Zerefos, M. Türkes, J. Luterbacher “Heat wave changes in the eastern Mediterranean since 1960”, Geophys. Res. Lett., 37, L04802, doi: 10.1029/2009GL041841, 2010. Selected as “Research Spotlight" from the American Geophysical Union (AGU).
• Luterbacher J., S.J. Koenig, J. Franke, G. van der Schrier, E. Zorita, A. Moberg, J. Jacobeit, P.M. Della-Marta, M. Küttel, E. Xoplaki, D. Wheeler, T. Rutishauer, M. Stössel, H. Wanner, R. Brázdil, P. Dobrovolný, D. Camuffo, C. Bertolin, A. van Engelen, F.J. Gonzalez-Rouco, R. Wilson, C. Pfister, D. Limanówka, Ø. Nordli, L. Leijonhufvud, J. Söderberg, R. Allan, M. Barriendos, R. Glaser, D. Riemann, Z. Hao, C.S. Zerefos, “Circulation dynamics and its influence on European and Mediterranean January-April climate over the past half millennium: results and insights from instrumental data, documentary evidence and coupled climate models”, Clim. Change, 101, 201-234, doi: 10.1007/s10584-009-9782-0, 2010.
• Markakis, K., A. Poupkou, D. Melas, C. Zerefos, “A GIS based anthropogenic PM10 emission inventory for Greece”, Atmos. Pollution Res., 1, 71-81, 2010.
• Nastos, P.T., C. S. Zerefos, “Cyclic modes of the intra-annual variability of precipitation in Greece”, Adv. Geosci., 25, 45-50, 2010.
Oikonomou, C., H.A. Flocas, G. Katavoutas, M. Hatzaki, D.N. Asimakopoulos, C. Zerefos, “On the relationship of orography with extreme dry spells in Greece”, Adv. Geosci., 25, 161-166. Doi: 10.5194/adgeo-25-161-2010, 2010.
• Ordònez, C., N. Elguindi, O. Stein, V. Huijnen, J. Flemming, A. Inness, H. Flentje, E. Katragkou, P. Moinat, V-H. Peuch, A. Segers, V. Thouret, G. Athier, M. van Weele, C. S. Zerefos, J-P. Cammas, M. G. Schultz, “Global model simulations of air pollution during the 2003 European heat wave”, Atmos. Chem. Phys., 10, 789–815, 2010.
• Poupkou, A., T. Giannaros, K. Markakis, I. Kioutsioukis, G. Curci, D. Melas, C. Zerefos, “A model for European Biogenic Volatile Organic Compound emissions: Software development and first validation”, Envir. Modelling & Software, 25, 1845-1856, 2010.
• Romanou, A., G. Tselioudis, C.S. Zerefos, C.A. Clayson, J.A. Curry, A. Andersson, “Evaporation-Precipitation Variability over the Mediterranean and the Black Seas from Satellite and Reanalysis Estimates”, J. of Climate, 23, 5268-5287, 2010.
• Tselioudis, G., E. Tromeur, W. Rossow, C. Zerefos “Decadal changes in tropical convection suggest effects on stratospheric water vapor”, Geophys. Res. Lett., 37, L14806, doi:10.1029/2010GL044092, 2010.
• Amiridis, V., M. Kafatos, C. Perez, S. Kazadzis, E. Gerasopoulos, R.E. Mamouri, A. Papayannis, P. Kokkalis, E. Giannakaki, S. Basart, I. Daglis  and C. Zerefos “The potential of the synergistic use of passive and active remote sensing measurements for the validation of a regional dust model”, Ann. Geophys., 27, 3155-3164, 2009.
• Balis, D., R. Bojkov, K. Tourpali, C. Zerefos “Characteristics of the ozone decline over both hemispheres”, Int. J. of Rem. Sens., 30, 15-16, 3887-3895, 2009.
• Founda D., S. Lykoudis., B.E. Psiloglou, M. Petrakis, C. Zerefos, “Observations of the atmospheric surface layer parameters during the total solar eclipse of March 29th, in Greece”, Meteorol. Z, 18, 5, 489-494, 2009.
• Founda, D., H.D. Kambezidis, M. Petrakis, P. Zanis, C. Zerefos, “A correction of the recent air-temperature record at the historical meteorological station of the National Observatory of Athens (NOA) due to instrument change”, Theor. Appl. Climatol., 97:385-389, 2009.
• Georgoulias, A.K., D. Balis, M.E. Koukouli, C. Meleti, A. Bais, C. Zerefos, “A study of the total atmospheric sulfur dioxide load using ground-based measurements and the satellite derived Sulfur Dioxide Index”, Atmos. Envir., 43, 1693-1701, 2009.
• Gerasopoulos, E., P. Kokkalis, V. Amiridis, E. Liakakou, C. Perez, K. Haustein, K. Eleftheratos, M.O. Andreae, T.W. Andreae, C.S. Zerefos “Dust specific extinction cross-sections over the Eastern Mediterranean using the BSC-DREAM model and sun photometer data: the case of urban environments”, Ann. Geophys., 27, 2903-2912, 2009.
• Giannakopoulos, C., P. Hadjinicolaou, C. Zerefos, G. Demosthenous, “Changing energy requirements in the Mediterranean under changing climatic conditions”, Energies, 2, 805-815, doi:10.3390/en20400805, 2009.
• Kazantzidis, A., A.F. Bais, M.M. Zempila, C. Meleti, K. Eleftheratos, C.S. Zerefos, “Evaluation of ozone column measurements over Greece with NILU-UV multi-channel radiometers”, Int. J. of Rem. Sens., 30:15, 4273-4281, 2009. Kioutsioukis I., D. Melas, C. Zerefos, “Statistical assessment of changes in climate extremes over Greece (1955-2002)”, Int. J. Climatol., DOI:10.1002/joc.2030, 2009.
• Meleti, C., A. Bais, S. Kazadzis, N. Kouremeti, K. Garane, C. Zerefos, “Factors affecting solar ultraviolet irradiance measured since 1990 at Thessaloniki, Greece”, Int. J. of Rem. Sens., 30, 15-16, 4167-4179, 2009.
• Nastos, P.T., C.S. Zerefos, “Spatial and temporal variability of consecutive dry and wet days in Greece”, Atmos. Res., 94, 616-628, 2009.
• Tourpali, K., A.F. Bais, A. Kazantzidis, C.S. Zerefos, H. Akiyoshi, J. Austin, C. Brühl, N. Butchart, M.P. Chipperfield, M. Dameris, M. Deushi, V. Eyring, M.A. Giorgetta, D.E. Kinnison, E. Mancini, D.R. Marsh, T. Nagashima, G. Pitari, D.A. Plummer, E. Rozanov, K. Shibata, W. Tian, “Clear sky UV simulations for the 21st century based on ozone and temperature projections from Chemistry-Climate Models, Atmos. Chem. Phys., 9, 1165-1172, 2009.
• Zerefos, C.S., K. Eleftheratos, C. Meleti, S. Kazadzis, A. Romanou, C. Ichoku, G. Tselioudis, A. Bais, “Solar dimming and brightening over Thessaloniki, Greece, and Beijing, China”, Tellus B, DOI: 10.1111/j.1600-0889.2009.00425.x, 2009.
• Gerasopoulos, E., C.S. Zerefos, I. Tsagouri, D. Founda, V. Amiridis, A.F. Bais, A. Belehaki, N. Christou, G. Economou, M. Kanakidou, A. Karamanos, M. Petrakis, P. Zanis, “The total solar eclipse of March 2006: overview", Atmos. Chem. Phys.,  8, 5205-5220, 2008.
• Harris N.R.P., E. Kyrö, J. Staehelin, D. Brunner, S-B. Andersen, S. Godin-Beekmann, S. Dhomse, P. Hadjinicolaou, G. Hansen, I. Isaksen, A. Jrrar, A. Karpetchko, R. Kivi, B. Knudsen, P. Krizan, J. Lastovicka, J. Maeder, Y. Orsolini, J.A. Pyle, M. Rex, K. Vanicek, M. Weber, I. Wohltmann, P. Zanis, C.S. Zerefos, “Ozone trends at northern mid- and high latitudes - a European perspective”, Ann. Geophys., 26, 1-14, 2008.
• Isaksen, I.S.A., B. Rognerud, G. Myhre, J.D. Haigh, S.T. Rumbold, K.P. Shine, C. Zerefos, K. Tourpali, W. Randel, “Radiative forcing from modelled and observed stratospheric ozone changes due to the 11-year solar cycle”, Atmos. Chem. Phys. Discuss., 8, 4353-4371, 2008.
• Nastos, P., C.S. Zerefos, “Decadal changes in extreme daily precipitation in Greece”, Adv. Geosci., 16, 55-62, 2008.
• Poupkou, A., D. Melas, I. Ziomas, P. Symeonidis, I. Lisaridis, E. Gerasopoulos, C. Zerefos, "Simulated summertime regional ground-level ozone concentrations over Greece", Water Air Soil Pollut., doi: 10.1007/s11270-008-9766-0, 196, 169-181, 2008.
• Zanis, P., I. Kapsomenakis, C. Philandras, K. Douvis, D. Nikolakis, E. Kanellopoulou, C. Zerefos, C. Repapis, “Analysis of an ensemble of present day and future regional climate simulations for Greece”, Int. J. Climatol., DOI: 10.1002/joc.1809, 2008.
• Amiridis, V., D. Melas, D. S. Balis, A. Papayannis, D. Founda, E. Katragkou, E. Giannakaki, R. E. Mamouri, E. Gerasopoulos, C. Zerefos, “Aerosol Lidar observations and model calculations of the Planetary Boundary Layer evolution over Greece, during the March 2006 Total Solar Eclipse", Atmos. Chem. Phys., 7, 6181-6189, 2007.
• Eleftheratos, K., C.S. Zerefos, P. Zanis, D.S. Balis, G. Tselioudis, K. Gierens, R. Sausen, “A study on natural and manmade global interannual fluctuations of cirrus cloud cover for the period 1984-2004”, Atmos. Chem. Phys., 7, 2631-2642, 2007.
• Founda, D., D. Melas, S. Lykoudis, I. Lisaridis, E. Gerasopoulos, G. Kouvarakis, M. Petrakis, C. Zerefos, “The effect of the total solar eclipse of 29 March 2006 on meteorological variables in Greece”, Atmos. Chem. Phys., 7, 5543-5553, 2007.
• Kazadzis, S., A. Bais, V. Amiridis, D. Balis, C. Meleti, N. Kouremeti, C. S. Zerefos, S. Rapsomanikis, M. Petrakakis, A. Kelesis, P. Tzoumaka, K. Kelektsoglou, “Nine years of UV aerosol optical depth measurements at Thessaloniki, Greece”, Atmos. Chem. & Phys., 7, 2091-2101, 2007.
• Kazantzidis A., A. F. Bais, C. Emde, S. Kazadzis, C. S. Zerefos, “Attenuation of global ultraviolet and visible irradiance over Greece during the total solar eclipse of 29 March 2006”, Atmos. Chem. Phys., 7, 5959-5969, 2007.
• Nastos, P.T., C.S. Zerefos, “On extreme daily precipitation totals in Athens, Greece”, Adv. Geosci., 10, 59-66, 2007.
Tourpali K., C.S. Zerefos, D.S. Balis, A.F. Bais, “The 11-year solar cycle in stratospheric ozone: Comparison between Umkehr and SBUVv8 and effects on surface erythemal irradiance”, J. Geophys. Res., 112, D12306, doi:10.1029/2006JD007760, 2007.
• Zanis, P., E. Katragkou, M. Kanakidou, B. Psiloglou, S. Karathanasis, M. Vrekoussis, E. Gerasopoulos, I. Lysaridis, K. Markakis, A. Poupkou, V. Amiridis, D. Melas, N. Mihalopoulos, C. Zerefos, “Effects on surface atmospheric photo-oxidants over Greece during the total solar eclipse event on 29 March 2006”, Atmos. Chem. Phys., 7, 6061-6073, 2007.
• Zerefos, C., E. Gerasopoulos, I. Tsagouri, B. Psiloglou, A. Belehaki, T. Herekakis, A. Bais, S. Kazadzis, C. Eleftheratos, N. Kalivitis, N. Mihalopoulos, “Evidence of gravity waves into the atmosphere during the March 2006 total solar eclipse”, Atmos. Chem. Phys., 7, 4943-4951, 2007.
• Zerefos, C., K. Eleftheratos, P. Zanis, D. Balis, G. Tselioudis, “Search for Man-Made Cirrus Contrails over SE Asia”, Terr. Atmos. Ocean. Sci. Journal, Vol. 18, No 3, 459-474, 2007.
• Zerefos., C., V. Gerogiannis, D. Balis, S. Zerefos, A. Kazantzidis, “Atmospheric effects of volcanic eruptions as seen by famous artists and depicted in their paintings”, Atmos. Chem. Phys., 7, 4027-4042, 2007.
• Gerasopoulos, E., P. Zanis, C. Papastefanou, C. Zerefos, A. Ioannidou, H. Wernli, “A complex case study of a down to the surface intrusions of persistent stratospheric air over the Eastern Mediterranean”, Atmos. Envir., 40, 4113-4125, doi:10.1016/j.atmosenv.2006.03.022, 2006.
• Kazantzidis, A., A.F. Bais, J. Gröbner, J.R. Herman, S. Kazadzis, N. Krotkov, E. Kyrö, P.N. den Outer, K. Garane, P. Görts, K. Lakkala, C. Meleti, H. Slaper, R.B. Tax, T. Turunen, C.S. Zerefos, “Comparison of satellite-derived UV irradiances with ground-based measurements at four European stations”, J. Geophys. Res, 111, D13207, doi: 10.1029/2005JD006672, 2006.
• Rex, M., R.J. Salawitch, H. Deckelmann, P. von der Gathen, N.R.P. Harris, M.P. Chipperfield, B. Naujokat, E. Reimer, M. Allaart, S.B. Andersen, R. Bevilacqua, G.O. Braathen, H. Claude, J. Davies, H. De Backer, H. Dier, V. Dorokhov, H. Fast, M. Gerding, S. Godin-Beekmann, K. Hoppel, B. Johnson, E. Kyrö, Z. Litynska, D. Moore, H. Nakane, M.C. Parrondo, A.D. Riskley, Jr., P. Skrivankova, R. Stübi, P. Viatte, V. Yushkov, C. Zerefos, “Arctic winter 2005: Implications for stratospheric ozone loss and climate change”, Geophys. Res. Lett., 33, L23808, doi: 10.1029/2006GL026731, 2006.
• Zanis, P., E. Maillard, J. Staehelin, C. Zerefos, E. Kosmidis, K. Tourpali, I. Wohltmann, “On the turnaround of stratospheric ozone trends deduced from the reevaluated Umkehr record of Arosa, Switzerland”, J. Geophys. Res., 111, D22307, doi: 10.1029/2005JD006886, 2006.
• Zerefos, C., P. Nastos, D. Balis, A. Papayannis, A. Kelepertsis, E. Kanellopoulou, D. Nikolakis, K. Eleftheratos, W. Thomas, C. Varotsos, “A complex study of Etna’s volcanic plume from ground-based, in situ and space-borne observations”, Int. J. of Remote Sensing, 27, 9, 1855-1864, 2006.
• Amiridis V., D. Balis, S. Kazadzis, A. Bais, E. Giannakaki, A. Papayannis and C. Zerefos, “Four-year aerosol observations with a Raman lidar at Thessaloniki, Greece in the framework of European Aerosol Research Lidar Network (EARLINET), J. Geophys. Res., 110, D21203, doi: 10.1029/2005JD006190, 2005.
• Bais, A. F., A. Kazantzidis, S. Kazadzis, D. S. Balis, C. S. Zerefos, C. Meleti, “Deriving an effective aerosol single scattering albedo from spectral surface UV irradiance measurements”, Atmos. Environ., 39, 1093-1102, 2005.
• Isaksen, I.S.A., C. Zerefos, K. Kourtidis, C. Meleti, S. Dalsøren, J. Sundet, A. Grini, P. Zanis, D. Balis, “Tropospheric ozone changes at unpolluted and semipolluted regions induced by stratospheric ozone changes”, J. Geophys. Res., 110, D02302, doi: 10.1029/2004JD004618, 2005.
• Kazantzidis, A., A.F. Bais, D.S. Balis, E. Kosmidis, C.S. Zerefos, ”Sensitivity of solar UV radiation to ozone and temperature profiles at Thessaloniki (40.5oN, 23oE), Greece”, JASTP, 67, 1321-1330, 2005.
• Kioutsioukis, I., D. Melas, C. Zerefos, I. Ziomas, “Efficient sensitivity computations in 3D air quality models”, Comput. Phys. Commun., 167, 23-33, 2005. Papayannis, A., D. Balis, P. Zanis, E. Galani, H. Wernli, C. Zerefos, A. Stohl, S. Eckhardt, V. Amiridis, “Sampling of an STT event over the Eastern Mediterranean region by lidar and electrochemical sonde“, Annales Geophys., 23, 2039-2050, 2005.
• Papayannis, A., D. Balis, V. Amiridis, G. Chourdakis, G. Tsaknakis, C. Zerefos, A.D.A. Castanho, S. Nickovic, S. Kazadzis, J. Grabowski, “Measurements of Saharan dust aerosols over the Eastern Mediterranean using elastic backscatter-Raman lidar, spectrophotometric and satellite observations in the frame of the EARLINET project”, Atm. Chem. & Physics, 5, 2065-2079, 2005.
• Sausen, R., I. Isaksen, V. Grewe, D. Hauglustaine, D.S. Lee, G. Myhre, M. Köhler, G. Pitari, U. Schumann, F. Stordal, C. Zerefos, “Aviation radiative forcing in 2000: An update on IPCC (1999)“, Meteorol. Z., 14, 4, 555-561, 2005.
• Thomas, W., T. Erbertseder, T. Ruppert, M. van Roozendael, J. Verdebout, D. Balis, C. Meleti, C. Zerefos, “On the retrieval of volcanic sulfur dioxide emissions from GOME backscatter measurements“, J. Atmos. Chem., 50, 295-320, doi: 10.1007/s10874-005-5544-1, 2005.
Zerefos, C., K. Tourpali, D. Balis,”Solar activity-ozone relationships in the vertical distribution of ozone”, Intern. J. Remot. Sensing, 26, 16, 3449-3454, 2005.
• Balis, D., V. Amiridis, C. Zerefos, A. Kazantzidis, S. Kazadzis, A. Bais, C. Meleti, E. Gerasopoulos, A. Papayannis, V. Matthias, H. Dier, M. Andreae, “Study of the effect of different type of aerosols on UV-B radiation from measurements during EARLINET”, Atmos. Chem. Phys., 4, 307-321, 2004
• Balis, D.S, V. Amiridis, S. Nickovic, A. Papayannis, C. Zerefos, “Optical properties of Saharan dust layers as detected by a Raman lidar at Thessaloniki, Greece”, Geophys. Res. Lett., 31, L13104, doi: 10.1029/2004GL019881, 2004.
• Priller, A., M. Berger, H.W. Gäggeler, E. Gerasopoulos, P.W. Kubik, C. Schnabel, L. Tobler, E.M. Wild, P. Zanis, C. Zerefos, “Accelerator mass spectrometry of particle-boud 10Be“, Nucl. Instrum. Methods in Phys. Res., B, 223-224, 601-607, 2004.
• Zerefos C., D. Syrakov, K. Ganev, A. Vasaras, K. Kourtidis, M. Tzortziou, M. Prodanova, R. Dimitrova, E. Georgieva, D. Yordanov, N. Miloshev, “Study of the pollution exchange between Bulgaria and Northern Greece”, Int. J. Environment and Pollution, 22, 1/2, 163-185, 2004
• Balis, D.S., V. Amiridis, C. Zerefos, E. Gerasopoulos, M. Andreae, P. Zanis, A. Kazantzidis, S. Kazadzis, A. Papayannis, “Raman lidar and sunphotometric measurements of aerosol optical properties over Thessaloniki, Greece during a biomass burning episode”, Atmos. Environ., 37, 32, 4529-4538, 2003. • Galani, E., D. Balis, P. Zanis, C. Zerefos, A. Papayannis, H. Wernli, E. Gerasopoulos, “Observations of stratosphere-to-troposphere transport events over eastern Mediterranean using a ground-based lidar system”, J. Geophys. Res., 108, D12, 8527, doi: 10.1029/2002JD002596, 2003.
• Ganev, K., R. Dimitrova, D. Syrakov, C. Zerefos, “Accounting for the mesoscale effects on the air pollution in some cases of large sulfur pollution in Bulgaria or Northern Greece”, Env. Fluid Mechanics, 3, 41-53, 2003. • Gerasopoulos, E., C.S. Zerefos, C. Papastefanou, P. Zanis, K. O’Brien “Low-frequency variability of beryllium-7 surface concentrations over the Eastern Mediterranean”, Atmos. Env., 37, 1745-1756, 2003.
• Gerasopoulos, E., M.O. Andreae, C.S. Zerefos, T.W. Andreae, D. Balis, P. Formenti, P. Merlet, A. Amiridis, C. Papastefanou, “Climatological aspects of aerosol optical properties in Northern Greece”, Atmos. Chem.Phys., 3, 2025-2041, 2003.
• Kioutsioukis, I., C. Zerefos, D. Melas, I. Ziomas “Evolution of perturbations in 3D air quality models”, Ann. Geophysics., 46, 2, 353-362, 2003.
• Stohl, A., P. Bonasoni, P. Cristofanelli, W. Collins, J. Feichter, A. Frank, C. Forster, E. Gerasopoulos, H. Gäggeler, P. James, T. Kentarchos, H. Kromp-Kolb, B. Krüger, C. Land, J. Meloen, A. Papayannis, A. Priller, P. Seibert, M. Sprenger, G. J. Roelofs, H. E. Scheel, C. Schnabel, P. Siegmund, L. Tobler, T. Trickl, H. Wernli, V. Wirth, P. Zanis, C. Zerefos, “Stratosphere-troposphere exchange: A review, and what we have learned from STACCATO”, J. Geophys. Res., 108, D12, 8516, doi: 10.1029/2002JD002490, 2003.
• Zanis P., T. Trickl, A. Stohl, H. Wernli, O. Cooper, C. Zerefos, H. Gäggeler, C. Schnabel, L. Tobler, P. Kubik, A. Priller, H.E. Scheel, H.J. Kanter, P. Cristofanelli, C. Forster, P. James, E. Gerasopoulos, A. Delcloo, A. Papayannis, H. Claude, “Forecast, observation and modelling of a deep stratospheric intrusion event over Europe”, Atmos. Chem. Phys., 3, 763-777, 2003.
• Zanis, P., E. Gerasopoulos, A. Priller, C. Schnabel, A. Stohl, C. S. Zerefos, H. W. Gäggeler, L. Tobler, P. W. Kubik, H. J. Kanter, H. E. Scheel, J. Luterbacher, M. Berger, “An estimate of the impact of stratosphere-to-troposphere Transport (STT) on the lower free tropospheric ozone over the Alps using 10Be and 7Be measurements”, J. Geophys. Res., 108, D12, 8520, doi: 10.1029/2002JD002604, 2003.
• Zerefos, C., K. Eleftheratos, D. Balis, P. Zanis, G. Tselioudis, C. Meleti, ”Evidence of impact of aviation on cirrus cloud formation“, Atmos. Chem. Phys., 3, 1633-1644, 2003.
• Balis, D.S., C.S. Zerefos, K. Kourtidis, A.F. Bais, A. Hofzumahaus, A. Kraus, R. Schmitt, M. Blumthaler, G.P. Gobbi, “Measurements and modelling of photolysis rates during the Photochemical Activity and Ultraviolet Radiation (PAUR) II campaign”, J. Geophys. Res., 107, D18, 8138, doi: 10.1029/2000JD000136, 2002.
• Bojkov R.D., E. Kosmidis, J. DeLuisi, I. Petropavlovskikh, V.E. Fioletov, S. Godin, C. Zerefos, “Vertical ozone distribution characteristics deduced from ~ 44,000 re-evaluated Umkehr profiles (1957 - 2000), Meteorol. Atmos. Phys, 79, 127-158, 2002.
• Formenti, P., O. Boucher, T. Reiner, D. Sprung, M.O. Andreae, M. Wendisch, H. Wex, D. Kindred, M. Tzortziou, A. Vasaras, C. Zerefos, “STAAARTE-MED 1998 summer airborne measurements over the Aegean Sea: 2. Aerosol scattering and absorption, and radiative calculations”, J. Geophys. Res., 107, D21, 4451, doi:10.1029/2001JD001536, 2002.
• Formenti, P., T. Reiner, D. Sprung, M. O. Andreae, M. Wendisch, H. Wex, D. Kindred, K. Dewey, J. Kent, M. Tzortziou, A. Vasaras, C. Zerefos “STAAARTE-MED 1998 summer airborne measurements over the Aegean Sea: I. Aerosol particles and trace gases”, J. Geophys. Res., 107, 4450, doi: 10.1029/2001JD001337, 2002.
• Hofzumahaus, A., A. Kraus, A. Kylling, C.S. Zerefos “Solar actinic radiation (280-420nm) in the cloud-free troposphere between ground and 12 km altitude: Measurements and model results” J. Geophys. Res., 107, D18, 8139, doi:10.1029/2001JD900142, 2002.
• Kourtidis, K., C. Zerefos, S. Rapsomanikis, V. Simeonov, D.S. Balis, P.E. Perros, A. Thompson, J. Witte, B. Calpini, W.M. Sharobiem, A. Papayannis, N. Mihalopoulos, R. Drakou, “Regional levels of ozone in the troposphere over eastern Mediterranean”, J. Geophys. Res., 107, D18, 8140, doi: 10.1029/2000JD000140, 2002.
• Kourtidis, K., I. Ziomas, C. Zerefos, E. Kosmidis, P. Symeonidis, E. Christophilopoulos, S. Karathanasis, A. Mploutsos, "Benzene, toluene, ozone, NO2 and SO2 measurements in an urban street canyon in Thessaloniki, Greece", Atmos. Environ., 36, 5355-5364, 2002.
• Kouvarakis, G., M. Vrekoussis, N. Mihalopoulos, K. Kourtidis, B. Rappenglueck, E. Gerasopoulos, C. Zerefos, “Spatial and temporal variability of tropospheric ozone (O3) in the boundary layer above the Aegean Sea (eastern Mediterranean)”, J. Geophys. Res., 107, D18, 8137, doi: 10.1029/2000JD00081, 2002.
• Rapsomanikis, S., C. Zerefos, D. Melas, N. Tsangas, “Transport of toxic organic aerosol pollutants from Yugoslavia to Greece during the operation 'Allied Force'”, Environ. Technol., 23, 1119-1125, 2002.
• Zanis, P., K. Kourtidis, B. Rappenglueck, C. Zerefos, D. Melas, D. Balis, R. Schmitt, S. Rapsomanikis, P. Fabian, “A case study on the possible link between surface ozone photochemistry and total ozone column during the PAUR II experiment at Crete: Comparison of observations with box model calculations”, J. Geophys. Res., 107, D18, 8136, doi: 10.1029/2000JD000137, 2002.
• Zerefos, C., K. Kourtidis, D. Melas, D.S. Balis, P. Zanis, L. Katsaros, H. T. Mantis, C. Repapis, I. Isaksen, J. Sundet, J. Herman, P.K. Bhartia, B. Calpini, “Photochemical Activity and Solar Ultraviolet Radiation (PAUR) Modulation Factors: An overview of the project“, J. Geophys. Res., 107, D18, 8134, doi: 10.1029/2000JD000134, 2002.
• Zerefos, C.S., “Long-term ozone and UV variations at Thessaloniki, Greece”, Phys. and Chem. of the Earth, 27, 455-460, 2002.
• Formenti P, M.O. Andreae, T.W. Andreae, E. Galani, A. Vasaras, C. Zerefos, V. Amiridis, L. Orlovsky, a. Karnieli, M. Wendisch, H. Wex, B.N. Holben, W. Maenhaut, J. Lelieveld, “Aerosol optical properties and large-scale transport of air masses: Observations at a coastal and a semiarid site in the eastern Mediterranean during summer 1998”, J. Geophys. Res. 106, 9, 9807-9826, 2001.
• Gerasopoulos E., P. Zanis, A Stohl, C.S. Zerefos, C. Papastefanou, W. Ringer, L. Tobler, S. Hübener, H.W. Gäggeler, H.J. Kanter, L. Tositti, S. Sandrini, “A climatology of 7Be at four high-altitude stations at the Alps and the Northern Apennines”, Atmos. Environ., 35, 6347-6360, 2001.
• Melas, D., T. Persson, H. De Bruin, S.-E. Gryning, E. Batchvarova, C. Zerefos, "Numerical model simulations of boundary-layer dynamics during winter conditions", Theor. Appl. Climatol., 70, 105-116, 2001. 
• Schulz, A., M. Rex, N.R.P. Harris, G.O. Braathen, E. Reimer, R. Alfier, I. Kilbane-Dawe, S. Eckermann, M. Alaart, M. Alpers, B. Bojkov, J. Cisneros, H. Claude, E. Cuevas, J. Davies, H. De Backer, H. Dier, V. Dorochov, H. Fast, S. Godin, B. Johnson, B. Kois, E. Kondo, E. Kosmidis, E. Kyrö, Z. Litynska, IS Mikkelsen, M. Molyneux, G. Murphy, T. Nagai, H. Nakane, F. O’Connor, C. Parrondo, FJ Schmidlin, P. Skrivankova, C. Varotsos, C. Vialle, P. Viatte, V. Yushkov, C. Zerefos, P. von der Gathen “Arctic ozone loss in threshold conditions: Match observations in 1997/1998 and 1998/1999”, J. Geophys. Res.,106, D7, 7495-7503, 2001.
• Vasaras, A., A. Bais, U. Feister, C. Zerefos, “Comparison of two methods for cloud flagging of spectral UV measurements”, Atmos. Res., 57, 31-42, 2001.
• Zanis, P., C.S. Zerefos, S. Gilge, D. Melas, D. Balis, I. Ziomas, E. Gerasopoulos, P. Tzoumaka, U. Kaminski, W. Fricke, “Comparison of measured and modeled surface ozone concentrations at two different sites in Europe during the solar eclipse on August 11, 1999”, Atmos. Environ., 35, 4663-4673, 2001.
• Zerefos, C., D. Balis, M. Tzortziou, A. Bais, K. Tourpali, C. Meleti, G. Bernhard, J. Herman, “A note on the interannual variations of UV-B erythemal doses and solar irradiance from ground-based and satellite observations”, Ann. Geophys., 19, 115-120, 2001.
• Zerefos, C., K.A. Kourtidis, D. Balis, A. Bais, B. Calpini, “Photochemical activity over the eastern Mediterranean under variable environmental conditions”, Phys. Chem. Earth, Part C: Solar, Terrestrial & Planetary Science, 26, 7, 549-554, 2001.
• Zerefos, C.S., D.S. Balis, P. Zanis, C. Meleti, A.F. Bais, K. Tourpali, D. Melas, I. Ziomas, E. Galani, K. Kourtidis, A. Papayannis, Z. Gogosheva, “Changes in surface UV solar irradiance and ozone over the Balkans during the eclipse of August 11, 1999”, Adv. Space Res., 27, 12, 1955 - 1963, 2001.
• Zerefos, C.S., K. Tourpali, I.S.A. Isaksen, C.J.E. Schuurmans, “Long term solar induced variations in total ozone, stratospheric temperatures and the tropopause”, Adv. Space Res., 27, 12, 1943-1948, 2001.
• Balis, D., A. Papayannis, E. Galani, F. Marenco, V. Santacesaria, E. Hamonou, P. Chazette, I. Ziomas, C. Zerefos, “Tropospheric LIDAR aerosol measurements and sun photometric observations at Thessaloniki, Greece”, Atmos. Environ, 34, 925-932, 2000.
• Drakou, G., C. Zerefos, I. Ziomas, “A sensitivity study of parameters in the Nazaroff-Cass iag model with respect to indoor concentrations of O3, NO, NO2”, Environ. Technol., Vol 21. 483-503, 2000.
• Drakou, G., C. Zerefos, I. Ziomas, V. Ganitis “Numerical simulation of indoor air pollution levels in a church and in a museum in Greece”, Stud. Conserv., 45, 85-94, 2000.
• Jonson, J.E., A. Kylling, T. Berntsen, I.S.A. Isaksen, C.S. Zerefos, K. Kourtidis, “Chemical effects of UV fluctuations inferred from total ozone and tropospheric aerosol variations”, J. Geophys. Res., 105, D11, 14561-14574, 2000.
• Kazadzis, S., A.F. Bais, D. Balis, C.S. Zerefos, M. Blumthaler, “Retrieval of downwelling UV actinic flux density spectra from spectral measurements of global and direct solar UV irradiance”, J. Geophys. Res., 105, 4857-4864, 2000.
• Kourtidis, K., I. Ziomas, C. Zerefos, A. Gousopoulos, D. Balis, P. Tzoumaka, “Benzene and toluene levels measured with a commercial DOAS system in Thessaloniki, Greece”, Atmos. Environ., 34, 1471-1480, 2000.
• Mantis, H.T., C.C. Repapis, C.M. Philandras, A.G. Paliatsos, C.S. Zerefos, A.F. Bais, C. Meleti, D.S. Balis, “A 5-year Climatology of the solar erythemal ultraviolet in Athens, Greece”, Int. J. Climatology, 20, 1237-1247, 2000.
• Melas, D., C. Zerefos, S. Rapsomanikis, N. Tsangas, A. Alexandropoulou, “The War in Kosovo. Evidence of Pollution Transport in the Balkans During Operation ‘Allied Force’”, Environ. Sci. & Pollut. Res., 7, 97-103, 2000.
• Schulz, A., M. Rex, J. Steger, N. Harris, G.O. Braathen, E. Reimer, R. Alfier, A. Beck, M. Alpers, J. Cisneros, H. Claude, H. De Backer, H. Dier, V. Dorokhov, H. Fast, S. Godin, G. Hansen, H. Kanzawa, B. Kois, Y. Kondo, E. Kosmidis, E. Kyrö, Z. Litynska, M. J. Molyneux, G. Murphy, H. Nakane, C. Parrondo, F. Ravegnani, C. Varotsos, C. Vialle, P. Viatte, V. Yushkov, C. Zerefos, P. von der Gathen, “Match observations in the Arctic winter 1996/97: High stratospheric ozone loss rates correlate with low temperatures deep inside the polar vortex”, Geophys. Res. Lett., 27, 2, 205-208, 2000.
• Zerefos, C., D.S. Balis, C. Meleti, A.F. Bais, K. Tourpali, K. Kourtidis, K. Vanicek, F. Cappellani, U. Kaminski, T. Colombo, R. Stübi, L. Manea, P. Formenti, M.O. Andreae, “Changes in surface solar UV irradiances and total ozone during the solar eclipse of August 11, 1999”, J. Geophys. Res., 105, D21, 26463-26473, 2000.
• Zerefos, C., K. Ganev, K. Kourtidis, M. Tzortziou, A. Vasaras, E. Syrakov, “On the origin of SO2 above Northern Greece”, Geophys. Res. Lett., 27, 3, 365-368, 2000.
• Zerefos, C.S., C. Meleti, D.S. Balis, A.F. Bais, D. Gillotay, “On changes of spectral UV-B in the 90's in Europe”, Adv. Space Res., 26, 12, 1971-1978, 2000. Bais, A.F., S. Kazadzis, D. Balis, C.S. Zerefos, M. Blumthaler, "Correcting global solar ultraviolet spectra recorded by a Brewer spectroradiometer for its angular response error", Appl. Optics, 37, 27, 6339-6344, 1998.
• Balis, D., K. Tourpali, C. Zerefos, C. Meleti, I. Ziomas, A. Bais, A. Papayannis, A. Paliatsos, “On the daily maximum UV-B doses during the significant ozone deficiencies in the transition seasons of 1992/93”, Adv. Space Res., 22, 11, 1505-1508, 1998.
• Bojkov, R.D., D.S. Balis, C.S. Zerefos, "Characteristics of the ozone decline in the northern polar and middle latitudes during the winter-spring", Meteor. Atmos. Phys., 69, 1-2, 119-135, 1998.
• Drakou, G., C. Zerefos, I. Ziomas, M. Voyatzaki, "Measurements and numerical simulations of indoor O3 and NOx in two different cases", Atmos. Environ., 32, 4, 595-610, 1998.
• Kentarchos, A., T.D. Davies, C. Zerefos, "A low latitude stratospheric intrusion associated with a cut-off low", Geophys. Res. Lett., 25, 1, 67-70, 1998.
• Kylling, A., A. F. Bais, M. Blumthaler, J. Schreder, C. S. Zerefos, E. Kosmidis, "Effect of aerosols on solar UV irradiances during the Photochemical Activity and Solar Ultraviolet Radiation campaign”, J. Geophys. Res., 103, D-20, 26051-26060, 1998.
• Melas, D., I. Ziomas, O. Klemm, C. Zerefos, "Anatomy of the sea-breeze circulation in Athens area under weak large-scale ambient winds", Atmos. Environ., 32, 12, 2223-2237, 1998.
• Melas, D., I. Ziomas, O. Klemm, C. Zerefos, "Flow dynamics in Athens area under moderate large-scale winds ", Atmos. Environ., 32, 12, 2209-2222, 1998. Papayannis, A., J. Porteneuve, D. Balis, C. Zerefos, E. Galani, “Design of a new DIAL system for tropospheric and lower stratospheric ozone monitoring in Northern Greece”, Phys. Chem. Earth, Part C: Solar, Terrestrial & Planetary Science, 24, 5, 439-442, 1999.
• Papayannis, Α., D. Balis, A.F. Bais, H. Van der Bergh, B. Calpini, E. Durieux, L. Fiorani, L. Jaquet, I. Ziomas, C.S. Zerefos, “Role of urban and suburban aerosols on solar UV radiation over Athens, Greece”, Atmos. Environ., 32, 12, 2193-2201, 1998.
• Reid, S.J., M. Rex, P. von den Gathen, I. Fløisand, F. Stordal, G.D. Carver, A. Beck, E. Reimer, R. Krüger-Carstensen, L.L. De Haan, G.O. Braathen, V. Dorokhov, H. Fast, E. Kyrö, M. Gil, Z. Litynska, M. Molyneux, G. Murphy, F.M. O’Connor, F, Ravengani, C. Varotsos, J. Wenger, C. Zerefos, “A study of ozone laminae using diabatic trajectories, contour advection and photochemical trajectory model simulations”, J. Atmos. Chem, 30, 187-207, 1998.
• Rex, M., P. von der Gathen, G.O. Braathen, N.R.P. Harris, E. Reimer, A. Beck, A. Alfier, R. Krüger-Carstensen, M. Chipperfield, H. De Backer, D. Balis, F. O'Connor, H. Dier, V. Dorokhov, H. Fast, A. Gamma, M. Gil, E. Kyrö, Z. Litynska, I.S. Mikkelsen, M. Molyneux, G. Murphy, S.J. Reid, M. Rummukainen, C. Zerefos, "Chemical ozone loss in the Arctic winter 1994/95 as determined by the match technique", J. Atmos. Chem., 32, 35-59, 1999.
• Santacesaria, V., F. Marenco, D. Balis, A. Papayannis, C. Zerefos, “Lidar observations of the Planetary Boundary Layer above the city of Thessaloniki, Greece”, Nuovo Cimento, 21C, 6, 585-596, 1998.
• Zerefos, C., C. Meleti, D. Balis, K. Tourpali, A.F. Bais, "Quasi-biennial and longer-term changes in clear sky UV-B solar irradiance", Geophys. Res. Lett., 25, 23, 4345-4348, 1998.
• Ziomas, I., P. Tzoumaka, D. Balis, D. Melas, C. Zerefos, O. Klemm, "Ozone episodes in Athens, Greece. A modelling approach using data from the MEDCAPHOT-TRACE", Atmos. Environ., 32, 12, 2313-2321, 1998.
• Bais, A.F., M. Blumthaler, A.R. Webb, J. Groebner, P.J. Kirsch, B.G. Gardiner, C.S. Zerefos, T. Svenoe, T.J. Martin, “Spectral UV measurements over Europe within the second European stratospheric Arctic and midlatitude experiment activities”, J. Geophys. Res., 102, D7, 8731-8736, 1997.
• Harris N.R.P., G. Ancellet, L. Bishop, D.J. Hofmann, J.B. Kerr, R.D. McPeters, P. Prendez, W.J. Randel, J. Staehelin, B.H. Subbaraya, A. Volz-Thomas, J. Zawodny, C.S. Zerefos, “Trends in stratospheric and free tropospheric ozone”, J. Geophys. Res., 102, D1, 1571-1590, 1997.
• Marenco, F., V. Santacesaria, A.F. Bais, D.S. Balis, A. di Sarra, A. Papayannis, C. Zerefos, "Optical properties of tropospheric aerosols determined by lidar and spectrophotometric measurements (Photochemical Activity and solar Ultraviolet Radiation campaign)", Appl. Optics, 36, 27, 6875-6886, 1997. Tourpali, K., X.X. Tie, C.S. Zerefos, G. Brasseur, "Decadal evolution of total ozone decline: Observations and model results", J. Geophys. Res., 102, D20, 23955-23962, 1997.
• Zerefos C.S., K. Tourpali, B.R. Bojkov, D.S. Balis, B. Rognerund, I.S.A. Isaksen, “Solar activity-total column ozone relationships: Observations and model studies with heterogeneous chemistry”, J. Geophys. Res., 102, D1, 1561-1569, 1997.
• Zerefos, C.S., D. Balis, A. Bais, D. Gillotay, P. Simon, B. Mayer, G. Seckmeyer, "Variability of UV-B at four Stations in Europe", Geophys. Res. Lett., 24, 11, 1363-1366, 1997.
• Bais, A., C.S. Zerefos, C.T. McElroy “Solar UVB measurements with the double- and single- monochromator Brewer ozone spectrophotometers”, Geophys. Res. Lett., 23, 8, 833-836, 1996.
• Bojkov, R.D., V. Fioletov, D. Balis, C.S. Zerefos, T.V. Kadygrova, A.M. Shalamjansky, “Further ozone decline during the northern hemisphere winter-spring of 1994-1995 and the new record low ozone over Siberia”, Geophys. Res. Letters, 22, 20, 2729-2732, 1995.
• Katsikas, Μ.D., N.J. Muthama, S. Palmieri, A.M. Siani, C.S. Zerefos, “An investigation of a possible dependence of Brewer Number 67's total-ozone measurements on some atmospheric parameters, together with a presentation of a peculiar synoptic ozone case at Rome”, Nuovo Cimento, 18, 2, 153-160, 1995. Melas, D., I.C. Ziomas, C.S. Zerefos, “Boundary layer dynamics in an urban coastal environment under sea breeze conditions”, Atmos. Environ., 29, 24, 3605-3617, 1995.
• Zerefos, C.S., A.F. Bais, C. Meleti, I.C. Ziomas, “A note on the recent increase of solar UV-B radiation over northern middle latitudes”, Geophys. Res. Lett., 22, 10, 1245-1247, 1995.
• Zerefos, C.S., C. Meleti, A.F. Bais, A. Lambros, “The recent UVB variability over Southeastern Europe”, J. Photoch. & Photobio., B: Biology, 31, 15-19, 1995. • Ziomas I.C., P. Suppan, B. Rappenglück, D. Balis, P. Tzoumaka, D. Melas, A. Papayannis, P. Fabian and C.S. Zerefos, "A contribution to the study of photochemical smog in the greater Athens area", Beitr. Phys. Atmos., 68, 3, 191-203, 1995.
• Ziomas, I.C., A.G. Paliatsos, L.G. Viras, C.S. Zerefos, “A note on smoke concentrations in urban Athens, using data measured by two different methods”, Meteorol. Atmos. Phys., 55, 215-221, 1995.
• Ziomas, I.C., D. Melas, C.S. Zerefos, A.F. Bais, A.G. Paliatsos, “Forecasting peak pollutant levels from meteorological variables”, Atmos. Eviron., 29, 3703-3711, 1995.
• Bais, A.F., C.S. Zerefos, C. Meleti, I.C. Ziomas, K. Tourpali, V. Karaouza, D. Balis, “Variability of solar UV-B radiation at high and middle latitudes during EASOE 91-92”, Geophys. Res. Lett., 21, 13, 1403-1406, 1994. • Bais, A.F., C.S. Zerefos, K.D. Tourpali, "Solar UV-B measurements with a double-monochromator Brewer spectrophotometer", Geomagn. Aeron., 34, 5, 196-199, 1994.
• Bais, A.F., K.D. Tourpali, C.S. Zerefos, I.C. Ziomas, “Reply to the paper: On the total ozone depletion over Greece derived from satellite flown and ground-based instruments”, Int. J. Remote Sens., 15, 16, 3295-3301, 1994. • Bojkov, R.D., C.S. Zerefos, D.S. Balis, I.C. Ziomas, A.F. Bais, "Record ozone minimum over middle and high latitudes of the northern hemisphere during the winter-spring season 1992/93", Geomagn. Aeron., 34, 5, 97-104, 1994. Zerefos, C.S., K. Tourpali, A.F. Bais, “Further studies on possible volcanic signal to the ozone layer”, J. Geophys. Res., 99, D-12, 25741-25746, 1994. Bais, A.F., C.S. Zerefos, C. Meleti, I.C. Ziomas, K. Tourpali, "Spectral measurements of solar UVB radiation and its relations to total ozone, SO2, and clouds", J. Geophys. Res., 98, D3, 5199-5204, 1993.
• Bojkov R.D., C.S. Zerefos, D.S. Balis, I.C. Ziomas, A.F. Bais, "Record low total ozone during northern winters of 1992 and 1993", Geophys. Res. Lett., 20, 13, 1351-1354, 1993.
• Gardiner, B.G., A.R. Webb, A.F. Bais, M. Blumthaler, I. Dirmhirn, P. Forster, D. Gillotay, K. Henriksen, M. Huber, P.J. Kirsch, P.C. Simon, T. Svenoe, P. Weihs, C.S. Zerefos, "European Intercomparison of Ultraviolet Spectroradiometers", Environ. Technol., 14, 25-43, 1993.
• Kourtidis, K.A., P. Fabian, C.S. Zerefos, B. Rappenglück, “Peroxyacetyl nitrate (PAN), peroxypropionyl nitrate (PPN) and PAN / ozone ratio measurements at three sites in Germany”, Tellus, 45B, 442-457, 1993.
• Xanthakis, J., C. Poulakos, C. Zerefos, "Stratospheric ozone variations in the northern and the southern hemisphere during the period 1957-1990", Earth Moon Planets, 60, 109-125, 1993.
• Mantis H. T., C.C. Repapis, C.S. Zerefos, I.C. Ziomas, "Assessment of the potential for photochemical air pollution in Athens: A comparison of emissions and air-pollutant levels in Athens with those in Los Angeles”, J. Appl. Meteorol., 31, 12, 1467-1476, 1992.
• Stolarski, R., R. Bojkov, L. Bishop, C. Zerefos, J. Staehelin, J. Zawodny, "Measured Trends in Stratospheric Ozone", Science, 256, 342-349, 1992.
• Zerefos, C.S., A.F. Bais, I.C. Ziomas, R.D. Bojkov, "On the relative importance of quasi-biennial oscillation and El Nino/southern oscillation in the revised Dobson total ozone records", J. Geophys. Res., 97, D9, 10135-10144, 1992.
• Amanatidis, G.T., A.F. Bais, A.G. Kelessis, C.S. Zerefos, I.C. Ziomas, "Stratospheric and total NO2 column measurements with a modified Canterbury filter photometer", J. Atmos. Chem., 9, 435-446, 1989.
• Bais, A.F., C.S. Zerefos, I.C. Ziomas, "Design of a system for real-time modelling of the dispersion of hazardous gas releases in industrial plants", Part I: "Emissions from industrial stacks”, J. Loss Prevent. Process Ind., 2, 155-160, 1989.
• Repapis, C., C.J.E. Schuurmans, C.S. Zerefos, I.C. Ziomas, "A note on the frequency of occurrence of severe winters as evidenced in monastery and historical records from Greece during the period 1200-1900 A.D.", Theor. Appl. Climatol., 39, 213-217, 1989.
• Zerefos, C.S., I.C. Ziomas, A. Bais, G. Amanatidis, A. Kelesis, "Chemical oxidants in air of northern Greece in relation to meteorological and solar flux conditions", Toxicol. Environ. Chem., 20/21, 3-9, 1989.
• Ziomas, I.C., C.S. Zerefos, A.F. Bais, "Design of a system for real-time modelling of the dispersion of hazardous gas releases in industrial plants", Part II: "Accidental releases from storage installations", J. Loss Prevent. Process Ind., 2, 194-199, 1989.
• Ziomas, I.C., C.S. Zerefos, A.F. Bais, A.G. Proyou, G.T. Amanatidis, A.G. Kelessis, "Significant increasing trends in surface ozone in Greece", Environ. Technol. Lett., 10, 1071-1082, 1989.
• Mantis, H., C.S. Zerefos, A.F. Bais, I.C. Ziomas, A. Kelessis, "The northern hemisphere ozone minimum in 1982-1983", Arch. Met. Geoph. Biokl., Ser. B, 36, 135- 145, 1986.
• Zerefos, C.S., H. Mantis, A.F. Bais, I.C. Ziomas, N. Zoumakis, "Solar ultraviolet absorption by sulphur dioxide in Thessaloniki, Greece", Atmos. Ocean, 24, 3, 292-300, 1986.
• Zerefos, C.S., "Evidence of the El Chichon stratospheric volcanic cloud in northern Greece", Geof. Int., . 23-2, 299-304, 1984.
• Zerefos, C.S., "Long-term stratospheric temperature fluctuations and solar activity", Arch. Met. Geoph. Biokl., Ser. B, 32, 77-87, 1983.
• Zerefos, C.S., "On the quasi-biennial oscillation in equatorial stratospheric temperatures and total ozone”, Adv. Space Res., 2, 5, 177-181, 1983.
• Zerefos, C.S., C. Varotsos, C. Repapis, "A note on the intercomparison between monthly mean radiance equivalent and rocketsonde temperatures", Arch. Met. Geoph. Biokl., Ser. A, 32, 129-134, 1983.
• Ziomas, I., C.S. Zerefos, A.F. Bais, D. Metaxas, U. Tautorat, "On the strength of the ozone sink at the ground", Arch. Met. Geoph. Biokl., Ser. B, 33, 229-236, 1983.
• Van Loon, H., C.S. Zerefos, C.C. Repapis, "The southern oscillation in the stratosphere", Mon. Weather Rev., 110, 225-229, 1982.
• Zerefos, C.S., C.C. Repapis, R.L. Jenne, "Representativeness of total ozone trends as derived from satellite BUV and ground-based measurements", Pure Appl. Geophys., Vol. 120, 29-53, 1982.
• Zerefos, C.S., H. Van Loon, C.C. Repapis, "Possible evidence of the southern oscillation in total ozone at Arosa", Arch. Met. Geoph. Biocl., Ser. A, 31, 231-235, 1982.
• Mantis, H.T., C.S. Zerefos, C.C. Repapis, "Thermal regimes of the Polar stratosphere: An analysis of USSR rocket soundings", Beitr. Phys. Atmos., 54, 411-421, 1981.
• Xanthakis, J., C.S. Zerefos, P. Sehra, C. Repapis, C. Poulakos, "Rocket sonde-derived stratospheric temperature changes associated with a major solar cosmic ray event", Astrophysics and Space Science, 74, 475-480, 1981.
• Xanthakis, J., V.P. Tritakis, C.S. Zerefos, "A study of the inferred interplanetary magnetic field polarity periodicities", J. Interdiscipl. Cycle, 12, 205-215, 1981.
• Zerefos, C.S. "Short period oscillations in wintertime atmospheric vorticity patterns and the geomagnetic field", J. Interdiscipl. Cycle Res., 12, 2, 181-185, 1981.
• Mantis, H., C.C. Repapis, C.S. Zerefos, "The summer maximum in total ozone over northwest Europe", Pure Appl. Geophys., 119, 213-230, 1980.
• Zerefos, C.S., C.C. Repapis, "Fluctuations in the zonal tropical cloud cover from satellite brightness data", Adv. Space Research, 20, 29-32, 1980.
• Mantis, H., C.S. Zerefos, "Fluctuations in the northern hemisphere stratospheric temperature on time scales from ten years to two months", Arch. Met. Geoph. Biokl., Ser. A, 28, 127-147, 1979.
• Zerefos, C.S., C.C. Repapis, "Further evidence in stratospheric-tropospheric coupling: Biennial Oscillations in the tropical total cloud cover", Arch. Met. Geoph. Biokl., Ser. A, 28, 341-348, 1979.
• Zerefos, C.S., "Surface wind energy density over eastern Greece", Arch. Met. Geoph. Biokl., Ser. B, 26, 81-86, 1978.
• Zerefos, C.S., E. Zerefos, "Climatic change in Mycenaean Greece: A citation to Aristotle". Arch. Met. Geoph. Biokl., Ser. B, 26, 297-303, 1978.
Gerety, E., J.M. Wallace, C.S. Zerefos, "Sunspots, geomagnetic indices and the weather: A cross-spectral analysis between sunspots, geomagnetic activity and global weather data”, J. Atmos. Sc., 34, 673-678, 1977.
• Zerefos, C.S., E.J. Gerety, R.H. Olson, W.O. Roberts, "A global study on meteorological periodicities”, J. Interdiscipl. Cycle Res., 8, 3-4, 230-233, 1977.
• Zerefos, C.S., H.T. Mantis, "Climatic fluctuations in the northern hemisphere stratosphere”, Arch. Met. Geoph. Biokl., Ser. B, 25, 33-39, 1977. Olson, R.H., W.O. Roberts, C.S. Zerefos, "Short term relationships between solar flares, geomagnetic storms, and tropospheric vorticity patterns", Nature, 257, 113-115, 1975.
• Zerefos, C.S., "Circulation changes in the free atmosphere during proton events associated with type IV radio bursts ", Planet. Space Sci., 23, 1035-1043, 1975.
• Zerefos, C.S., J. Xanthakis, "Remarks on high latitude air temperature ranges and solar activity", Arch. Met. Geoph. Biokl., Ser. A, 24, 163-170, 1975. • Zerefos, C.S., P.J. Crutzen, "Stratospheric thickness variations over the northern hemisphere and their possible relation to solar activity", J. Geophys. Res., 80, 36, 5041-5043, 1975.
• Papagiannis, M.D., C.S. Zerefos, C.C. Repapis, "The time-latitude distribution of solar flares accompanied by type IV radio bursts during the period 1956 to 1969", Sol. Phys., 27, 208-216, 1972.


Publications at International Meetings


• Philandras, K., P. Nastos, J. Kapsomenakis, C. Repapis, C. Zerefos, “Greenhouse effect on upper air temperature over the Mediterranean. Present and future trends and variability”, Medclivar 2016 Conference, Athens, Greece, 26-30 September 2016.
• Kapsomenakis, J., P. Nastos, C. Zerefos, “Precipitation changes and atmospheric circulation over the Mediterranean”, Medclivar 2016 Conference, Athens, Greece, 26-30 September 2016.
• Balis, D., K. Eleftheratos, S. Hassinen, and C. S. Zerefos, “The use of QBO, ENSO, NAO perturbations in the evaluation of GOME-2A total ozone measurements”, Quadrennial Ozone Symposium 2016, 4–9 September 2016, Edinburgh, United Kingdom, QOS2016-312, 2016.
• Balis, D., C. Zerefos, I. Zyrichidou, K. Eleftheratos, K. Tourpali, R. van der A., P. von der Gathen, “Characteristics of the ozone variability over the high latitudes of the Northern Hemisphere during winter/spring for the period 1979-2016”, Quadrennial Ozone Symposium 2016, 4–9 September 2016, Edinburgh, United Kingdom, QOS2016-312, 2016.
• Philandras, C., J. Kapsomenakis, P. Nastos, C. Repapis, C. Zerefos, Climatology of upper air temperature over the Mediterranean, Trend and Variability (COMECAP 2016), 19-21 September 2016.
• Gerasopoulos, E. G. Maneas, N. Kalivitis, A. Metaxatou, E. Liakakou, R. Krejci, P. Tunved, H.C. Hansson, J. Sciare, N. Mihalopoulos, C. Zerefos “Aerosol monitoring activities at the Navarino Environmental Observatory, a new ACTRIS site in the Eastern Mediterranean”, 22nd European Aerosol Conference EAC2016, France, 4-9 September 2016.
• Liakakou, E., E. Gerasopoulos, D. Paraskevopoulou, P. Zarmpas, C. Theodosi, N. Kalivitis, G. Maneas, N. Mihalopoulos, C. Zerefos, “Aerosol chemical composition at NEO (Eastern Mediterranean) during the ARGON 2012 summer campaign”, 22nd European Aerosol Conference EAC2016, France, 4-9 September 2016.
• Mitsakis E., I. Stamos, K. Anastassiadou, H. Kammerer, I. Kaundinya, B. Kohl, J. Kapsomenakis, C. Zerefos, and G. Aifadopoulou, “Future changes in precipitation patterns and extremes: a model-based approach”, EGU General Assembly 2016, Vienna, Austria, 17–22 April 2016, Geophysical Research Abstracts, Vol. 18, EGU2016-9653, 2016.
• Nastos, P. T., C. S. Zerefos, I. N. Kapsomenakis, K. Eleftheratos, and I. Polychroni, “Human thermal comfort antithesis in the context of the Mediterranean tourism potential”, EGU General Assembly 2016, Vienna, Austria, 17–22 April 2016, Geophysical Research Abstracts, Vol. 18, EGU2016-9653, 2016.
• Zerefos, C., S.N. Ambrazeys, H. Badawy, E. Xirotyri-Zerefou, “Past and Present Geophysical Threat at the Great City of Alexandria”, Proceedings of the Tenth International Congress of Egyptologists, Univ. of the Aegean, Rhodes, 22-29 May 2009, P. Kousoulis & N. Lazaridis (eds), Orientalia Lovaniensia Analecta 241, ISBN 978-90-429-2550-2, 2015.
• Eskes, H., A. Arola, A. Blechschmidt, E. Cuevas, A. Gaudel, J. Kapsomenakis, E. Katragkou, M. Razinger, M. Schulz, N. Sudarchikova, A. Wagner, “Validation of reactive gases and aerosols in the MACC global analysis and forecast system”, Geophsycial Research Abstracts, Vol. 17, EGU2015-5858, EGU General Assembly, 2015.
• Zerefos, C., et al. “Chromatic ratios in art paintings and digital pictures as a new tool in estimating aerosol optical depths”, Conference “Volcanoes, Climate, and Society. Bicentenary of the great Tambora eruption”, Bern, Switzerland, 7-10 April 2015.
• Zerefos, C., I. Kapsomenakis, E. Gerasopoulos, V. Amoiridis, K. Eleftheratos, C. Meleti, H. Eskes, U. Kohler, “Tropospheric volcanism and air-traffic”, Global Conference on Global Warming, Athens, Greece, 24-27 May 2015.
• Zerefos, Eleftheratos K., I. Kapsomenakis, C. Zerefos and Brewer operators, “Volcanic and air transport effects on atmospheric composition”, 4th Conference on Transport, Atmosphere and Climate, Bad Kohlgrub, Germany, 22-25 June 2015.
• Nastos, P.T., C.S. Zerefos, I.N. Kapsomenakis, K. Douvis, D. Konsta, A. Matzarakis, “Present and future bioclimatic conditions of importance to tourism over the Mediterranean”, European Geosciences Union (EGU) General Assembly 2014, Vienna, Austria, 27 April-2 May 2014.
• Aggelis, D.E., P. Zanis, C.S. Zerefos “Mapping variability and trends of near surface NOx rural concentrations over Europe during 2004-2011”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, pp. 18-22, Heraklion, Greece, 28-31 May 2014.
• Bais A.F., Kazantzidis A., Giannaros Th., Zempila M.M., Kazadzis S., , Nikitidou Ε., Tzoumanikas P., Salamalikis V., Kosmidis E., Melas D., Zerefos C.S., Fragkos K., Fountoulakis I., Drosoglou Th., Kotti M.C, “The Hellenic Solar Energy Network: validation of products”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, pp. 103-107, Heraklion, Greece, 28-31 May 2014.
• Douvis, K., Kapsomenakis I., Zanis P., Konsta D., Zerefos C.S. “Study of climate change impacts on tourism in Messenia using a regional climate model”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, pp. 243-248, Heraklion, Greece, 28-31 May 2014.
• Eleftheratos K., Gierens K., Shi L., Kapsomenakis I., Zerefos C. S. “Preliminary analysis of long-term variability of upper tropospheric humidity in the northern mid-latitudes”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, p. 254, Heraklion, Greece, 28-31 May 2014.
• Founda D., Giannakopoulos C., Karali A., Zerefos C.S., “A climatic study at a vulnerable touristic region of Southwestern Greece Observations and simulations”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, p. 275-279, Heraklion, Greece, 28-31 May 2014.
• Fragkos K., Bais A.F., Meleti C., Fountoulakis I., Tourpali K., Balis D.S. Zerefos C.S., “Variability of a thirty-year record of total ozone derived from a Brewer spectrophotometer at Thessaloniki and the SBUV version 8.6 In: Proc. of 12th Int. Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, p. 300-304, Heraklion, Greece, 28-31 May 2014.
• Gerasopoulos E., Lianou M., Tunved P., Krejci R., Hansson H.C., Zerefos C.S., “Visibility records and trends since 1956, as a proxy of decadal changes in aerosol loads (SW Greece, Messenia) In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, p. 326-330, Heraklion, Greece, 28-31 May 2014.
• Kalabokidis K., Palaiologou P., Kostopoulou E., Zerefos C., Gerasopoulos E. and Giannakopoulos C, “Effect of climate projections on the behavior and impacts of wildfires in Messenia, Greece”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, pp. 395-400, Heraklion, Greece, 28-31 May 2014.
• Kapsomenakis I., Nastos P.T., Douvis K., Philandras K., Konsta D., Zerefos C.S., “The influence of North Sea-Caspian Pattern (NCP) on the precipitation regime over Europe and Mediterranean”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, p. 445-449, Heraklion, Greece, 28-31 May 2014.
• Karali A., Giannakopoulos C., Kostopoulou E., Varotsos K.V., Hatzaki M., Gerasopoulos, Ε., Zerefos C.S. “An integrated assessment of climate change impacts from the regional scale of the area of Peloponnese to the local scale of the area of Messinia”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 1, p. 467-471, Heraklion, Greece, 28-31 May 2014.
• Nastos P.T., Kapsomenakis I., Giannakopoulos C., Matzarakis A., Zerefos C.S. “Present and future projections of human-bioclimatic conditions over Peloponnese, based on regional climate model simulations”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete University Press, ISBN: 978-960-524-430-9. Vol. 2, p. 293-298, Heraklion, Greece, 28-31 May 2014.
• Philandras K., Nastos P.T., Kapsomenakis I., Repapis C.C., Zerefos C.S. “Variability and trends of mean maximum and mean minimum air temperature within the Mediterranean region, during the period 1951-2013”, In: Proceedings of 12th International Conference of Meteorology, Climatology and Physics of the Atmosphere COMECAP 2014, Kanakidou et al. (Eds.). Published by Crete Univ. Press, ISBN: 978-960-524-430-9. Vol. 3, p. 73-78, Heraklion, Greece, 28-31 May 2014.
• Zerefos, C., “2nd South Eastern Europe GEO Workshop on Integrating Earth Observation Data and Services for Monitoring the Environment and Protecting Citizens”, Athens, 20-21 October 2014.
• Zerefos, C., “Recent developments on the impacts of Transport on Climate Change”, European Conference of Transport Research Institutes (ECTRI) Thessaloniki Assembly, Thessaloniki, 17-18 November 2014
• Zerefos, C., “Future and Present Climate”, International Conference on "Climate Change: Past, Present & Future", Athens, 21 November 2014
• Seckmeyer, G., I. Smolskaia, D. Pissulla, A. F. Bais, K. Tourpali, C. Meleti, and C. Zerefos, larSo- UV: Measurements and Trends, Proc. Twenty Years of Ozone Decline, 359-368, 2009.
• Founda D., Lykoudis S., Psiloglou B.E., Petrakis M. and C.S. Zerefos, “Observations of the atmospheric surface layer parameters during the total solar eclipse of March 29th, 2006” Proceedings in 9th COMECAP2008, pp 289-296, Thessaloniki, 28-31 May 2008.
• Hadjinicolaou P., Zanis P., Douvis K., and C.S. Zerefos, “Validation of the PRECIS and RegCM3 regional climate models for the region of Greece”, Proceedings in 9th COMECAP2008, pp 553-559, Thessaloniki, 28-31 May 2008.
• Eleftheratos, K., C. Zerefos, E. Kanellopoulou, P. Nastos and D. Nikolakis, “Natural and anthropogenic variations of cirrus cloud cover on a global scale”, Proceedings in 9th COMECAP2008, pp 617-624, Thessaloniki, 28-31 May 2008.
• Zerefos, C., “Aristotle’s View on the Environment”, Proc. of the International Symposium ‘Science, Technology and Human Values’, Academy of Athens (Eds. L. Christophorou and C. Drakatos), pp 91-95, Athens, 2-4 May 2007 Zerefos, C., “Requiem to a 30-year friendship”, International Symposium ‘Climate Change Research Challenges’, EU Publications Office, pp 81-82, Brussels, 2-3 February 2006.
• Balis D., K. Kourtidis, and C. Zerefos, Contribution to DRAGON-STAR by the Greek teams, In: Proc. of Dragon Programme Mid-Term Results, 27 June-1 July 2005, Santorini, Greece, ESA SP-611, pp. 187-190, 2006.
• Thomas, W., Erbertseder, T., Ruppert, T., Van Roozendael, M., Balis, D., Meleti, C. and Zerefos, "Quantitative analysis of volcanic sulfur dioxide emissions using GOME backscatter measurements," in Proceedings of the First Conference on Atmospheric Science, 8-12 May 2006, Frascati, Italy, ESA publication SP-628, July 2006.
• Kazantzidis, A., A.F. Bais, C. Topaloglou, K. Garane, M. Zempila, C. Meleti, and C. Zerefos, Quality assurance of the Greek UV Network: preliminary results from the pilot phase eration,op- in Remote Sensing of Clouds and the Atmosphere XI, Proc. SPIE, 6362, Stockholm, Sweden, 11 September 2006, edited by J.R. Slusser, K. Schäfer, and A. Comerón, pp. 1-10, 2006
• Zerefos C.S., I.S.A. Isaksen and K. Eleftheratos, "Photochemical activity of importance to health in the Aegean", (eds. P. Nicolopoulou-Stamati, L. Hens and C.V. Howard), Proc. of the Environmental Health Impacts of Transport and Mobility, pp. 95-100, Springer, Printed in the Netherlands, 2005.
• Zerefos, C., “Precipitation in the Mediterranean Climate”, 7th Hellenic Hydrogeological Conference on Fissured Rocks Hydrology, Vol. II, pp 29-34, Athens, Greece, October 2005.
• Gerasopoulos E., Zanis P., Zerefos C.S., Papastefanou C., Ringer W., Gäggeler H.W., Tobler L., and Kanter H.J., Factors and processes controlling the concentration of the cosmogenic radionuclide 7Be at high-altitude alpine stations. Seventh International Symposium of the Natural Radiation Environment (NRE-VII), Proceedings in Radioactivity in the Environment, V7, ISSN 1569-4860/DOI 10.1016/S1569-4860(04)07108-6, ed: M.S. Baxter, Elsevier Science, 2005.
• Eleftheratos, C., C. Zerefos, “Updating the results on the effects of conventional fuelled aircraft on cirrus and contrail cirrus”, Proc. of the 2nd HyCARE Meeting, (eds. M.G. Schultz and M. Schwoon), pp 25-30, Luxemburg, Austria, 19-20 December 2005.
• Garane, K.E., A.F. Bais, K. Tourpali, C. Meleti, C. Zerefos, S. Kazadzis, “Variability of spectral UV irradiance at Thessaloniki, Greece, from 15 years measurements”, Proceedings of SPIE 5886, art. No 588606, pp. 1-10, 2005. Zerefos, C., K. Eleftheratos, “Long-term fluctuations of natural and man-made cirrus cloudiness”, 3rd Pan-GCSS meeting on Clouds, Climate and Models, Athens, 16-20 May 2005 (invited speaker).
• Zerefos, C., “UV-B Levels and their Trends”, Proc. of the Colloquium of the Foundation for Biomedical Research of the Academy of Athens “Environment and Health” and Workshop of the European Academies’ Science Advisory Council Environment Strategy Group “External Influences on Europe’s Air Quality Targets”, p. 129, Athens, Greece, October 22-24, 2004.
• Zerefos, C., K. Tourpali, D. Balis, L.L. Hood, “Solar activity – ozone relationships of importance in decadal changes in erythemal irrardiances and photolysis rates in the atmosphere”, Proc. of the Quadrennial Ozone Symposium QOS2004 (ed. C.S. Zerefos), p.p. 39-40, Kos, Greece, 1-8 June 2004.
• Gil, M., C. Parrondo, M. Navarro, E. Cuevas, A. Redondas, J.L. Camacho, A. Labajo, D.S. Balis, C.S. Zerefos, “Extreme Low Ozone events during the 2003/2004 winter”, Proc. of the Quadrennial Ozone Symposium QOS2004 (ed. C.S. Zerefos), p.p. 51-52, Kos, Greece, 1-8 June 2004.
• Streibel M., P. von der Gathen, M. Rex, H. Deckelmann, N.R.P. Harris, G.O. Braathen, M.P. Chipperfield, G. Millard, E. Reimer, R. Alfier, M. Allaart, S.B. Andersen, J. Araujo, D. Balis, O. Billett, C. Cambridge, H. Claude, S.R. Colwell, J. Davies, H. De Backer, T. Deshler, H. Dier, V. Dorokhov, J. Easson, H. Fast, M. Gerding, M. Ginzburg, S. Godin-Beekmann, B. Johnson, J.A. Karhu, A. Klekociuk, E. Kyro, Z. Litynska, D. Moore, E. Moran, T. Nagai, H. Nakane, C. Parrondo, F. Ravegnani, H.K. Roscoe, K. Sato, J.D. Shanklin, P. Skrivankova, R. Stubi, O.P. Tripathi, C. Varotsos, C. Vialle, P. Viatte, T. Yamanouchi, M. Yela, N. Yoshizawa, V. Yushkov, C. Zerefos, “Ozone loss rates over the Arctic 2002/03 and Antarctic 2003 measured with the Match approach”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 55, Kos, Greece, 1-8 June 2004.
• Kalabokas, P.D., C.C. Repapis, G. Chronopoulos, C. Varotsos, C. Zerefos, “Vertical tropospheric ozone characteristics over Athens, Greece”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 191-192, Kos, Greece, 1-8 June 2004.
• Repapis, C., C. Philandras, A.G. Paliatsos, P. Zanis, C. Zerefos, P. Nastos, K. Eleftheratos, C. Meleti, D. Balis, ”A 10-year climatology of the air pollution effect on erythemal UV-B doses reaching ground level at Athens, Greece”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 251-252, Kos, Greece, 1-8 June 2004.
• Hood, L.L., B. Soukharev, C. Zerefos, K. Tourpali, “Altitude dependence of the solar cycle variation of ozone: Comparisons with ground-based data and interpretation”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 353-354, Kos, Greece, 1-8 June 2004.
• Kosmidis, E., P. Zanis, C.S. Zerefos, “Comparison and Trends derived from Brewer-Umkehr Measurements made in Thessaloniki, Greece for the last 15 years”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 381, Kos, Greece, 1-8 June 2004.
• Kosmidis, E., A.F. Bais, C. Meleti, C.T. McElroy, C.S. Zerefos, “A review on the Brewer-Umkehr measurements made in Thessaloniki, Greece for the last 13 years”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 493, Kos, Greece, 1-8 June 2004.
• Postylyakov, O.V., C.S. Zerefos, E. Kosmidis, I.V. Mitin, “The Brewer Umkehr algorithm for ozone profile retrieval: a complete account of multiple scattering of light”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 494-495, Kos, Greece, 1-8 June 2004.
• Galani, E., D. Balis, A. Papayannis, C. Zerefos, V. Amiridis, “An Assessment of the Characteristics of the AUTH ultra-violet DIAL ozone measuring system”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 531, Kos, Greece, 1-8 June 2004.
• Poupkou, A., P. Simeonidis, I. Lisaridis, E. Pouspourika, O.D. Yay, D. Melas, D. Balis, I. Ziomas, C.S. Zerefos, “Compilation of an emission inventory for the purpose of studying the regional photochemical pollution in the Balkan region”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 902-903, Kos, Greece, 1-8 June 2004.
• Isaksen, I.S.A., C. Zerefos, K. Kourtidis, C. Meleti, S.B. Dalsoren, P. Zanis, D. Balis, J.K. Sundet, “Surface level ozone changes induced by stratospheric ozone changes”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 976-977, Kos, Greece, 1-8 June 2004.
• Bais, A.F., E. Kosmidis, A. Kazantzidis, S. Kazadzis, C. Topaloglou, C.S. Zerefos, “ of a network for UV monitoring in Greece”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 1065-1066, Kos, Greece, 1-8 June 2004.
• Kazantzidis, A., A.F. Bais, D.S. Balis, E. Kosmidis, M-M Zebila, C.S. Zerefos, “Sensitivity of solar UV radiation calculations to ozone and temperature profiles”, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 1101-1102, Kos, Greece, 1-8 June 2004.
• Meleti, C., A. Bais, C. Zerefos, K. Garane, S. Kazadzis, “Temporal and spatial variability of solar ultraviolet measurements in Greece“, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 1130-1131, Kos, Greece, 1-8 June 2004.
• Zerefos, C., P. Zanis, E. Kosmidis, K. Tourpali, “Statistical trend analysis of UMKEHR data at selected northern hemisphere stations“, Proc. of the Quadrennial Ozone Symposium QOS2004, (ed. C.S. Zerefos), p.p. 1201-1202, Kos, Greece, 1-8 June 2004.
• Balis, D., V. Amiridis, S. Nickovic, A. Papayannis, C. Zerefos, E. Giannakaki, “Optical properties of Saharan dust over Thessaloniki, Greece”, Proc. of the 22nd International Laser Radar Conference (ILRC 2004), p. 887-890, Matera, Italy,12-16 July 2004.
• Papayannis, A., D. Balis, G. Tsaknakis, V. Amiridis, C. Zerefos, S. Tzortzakis, “Profiling of aerosol optical properties over Athens and Thessaloniki, Greece, during special events using ground based elastic backscatter – Raman Lidar systems (2000-2003)”, Proc. of the 22nd International Laser Radar Conference (ILRC 2004), p. 891-894, Matera, Italy, 12-16 July 2004. Zerefos, C.S., K. Eleftheratos, “Results from the Environmental Consequences from the CRYOPLANE Project”, Proc. of the 1st HyCare Meeting, pp. 44-50, Hamburg, 16-17 December 2004.
• Zerefos, C., “The role of photochemistry, transport and aerosols in the maintenance of high background ozone over SE Europe“, Proc. of the Colloquium of the Committee for Global Change of the Academy of Athens and the Mariolopoulos-Kanaginis Foundation for Environmental Sciences entitled “Planetary Changes in the Atmospheric Environment”, 19 April 2002, p. 47, 2003.
• Balis, D., V. Amiridis, C. Zerefos, R. Mamouri, A. Papayannis, “Regional and long range transported aerosols detected with a raman lidar over Thessaloniki, Greece”, European Aerosol Conference, Madrid, September 2003, J. Aer. Sci, Suppl., p. 1041-1042, 2003.
• Balis, D., V. Amiridis, C. Zerefos, E. Gerasopoulos, M.O. Andreae, P. Zanis, A. Kazantzidis, S. Kazadzis, A. Papayannis, “Raman Lidar and sun photometric measurements of aerosol optical properties during biomass burning episode over Thessaloniki, Greece”, European Aerosol Conference, Madrid, September 2003, J. Aer. Sci, Suppl., p. 1107-1108, 2003.
• Brunner, D., J. Staehelin, D. Hauglustaine, L. Jourdain, H. Rogers, M. Koehler, R. Crowther, T.K. Berntsen, I. Isaksen, E. Meijer, P. van Veltoven, V. Grewe, R. Sausen, G. Pitari, E. Mancini, C. Zerefos, K. Kourtidis, “An evaluation of chemistry transport models by comparison with scientific aircraft measurements”, 6th European Symposium on Stratospheric Ozone, (eds. N. Harris, G. Amanatidis, J. Levine), 2-6 September 2002, Goteborg, Sweden, European Commission, Air Pollution Research Report 79, p. 79-83, 2003.
• Kelder, H., H. Eskes, F. Boersma, I. Isaksen, M. Gauss, C. Zerefos, D. Balis, U. Platt, M. Wenig, T. Wagner, S. Beirle, G. Hansen, A. Vik and C. Zehner, “The GOA Project“, Proc. of the 6th European Symp. on Stratospheric ozone (eds. N. Harris, G. Amanatidis, J. Levine), 2-6 September 2002, Goteborg, Sweden, European Commission, Air Pollution Research Report 79, p. 235-239, 2003.
• Zerefos, C., K.A. Kourtidis, D. Melas, D. Balis, P. Zanis, L. Katsaros, H.T. Mantis, C. Repapis, I. Isaksen, J. Sundet, J. Herman, P.K. Bhartia, B. Calpini, “Photochemical Activity and Solar Ultraviolet Radiation Modulation Factors: Results for PAUR Projects”, Proc. of the 6th European Symp. on Stratospheric ozone (eds. N. Harris, G. Amanatidis, J. Levine), 2-6 September 2002, Goteborg, Sweden, European Commission, Air Pollution Research Report 79, p. 510-513235-239, 2003
• Zerefos C. S., K. Eleftheratos, P. Zanis, D. Balis and G. Tselioudis, “Variability of cirrus clouds: Natural perturbations and possible signal of cirrus contrails in the tropics”, TROPIC Workshop, Oberpfaffenhofen, Germany, p. 42, 14-16 May 2003.
• Balis, D.S., V. Amiridis, C. Zerefos, C. Meleti, A. Kazantzidis, S. Kazadzis, A.F. Bais, A. Papayannis, “Experimental estimates of the lidar ratio and the single scattering albedo during EARLINET and their association with the of levels of UV irradiance at the Earth’s surface”, 6th International Symposium on Tropospheric Profiling", Leipzig, Germany, 14-20 September, 2003, p. 351-353, 2003.
• Galani E., A. Papayannis, D. Balis, P. Zanis, H. Wernli, C. Zerefos, A. Stohl and S. Eckhardt, “Validation of a ground-based ozone DIAL system for monitoring stratosphere-to-troposphere transport events in the Eastern Mediterranean”, 6th International Symposium on Tropospheric Profiling", Leipzig, Germany, 14-20 September, 2003, p. 236-238, 2003.
• Amiridis, V., D.S. Balis, C. Zerefos, D. Melas, I. Morfidou, A. Papayannis “Aerosol lidar measurements in the planetary boundary layer and free troposphere over Thessaloniki, Greece, within the EARLINET project”, 6th International Symposium on Tropospheric Profiling: Needs and Technologies, Leipzig, Germany, 14-20 September, 2003, p. 348-350, 2003.
• Balis D.S., C. Zerefos, A. Kazantzidis, K. Elefteratos, C. Meleti, G. Tselioudis, “The effects of different type of contrails to the photolysis rates of J(O1D) and J(NO2)”, In: “Lidar Remote Sensing in Atmospheric and Earth Sciences, 21th ILRC, Quebec, Canada, 8-12 July, 2002, (eds. L. Bissonnette, G. Roy and G. Vallee), p. 125-127, 2002.
• Balis, D., V. Amiridis, C. Zerefos, A. Papayannis, “Verification of the experimental determination of the lidar overlap profile by a Raman lidar”, in: Lidar Remote Sensing in Atmospheric and Earth Sciences, 21th ILRC, Quebec, Canada, 8-12 July, 2002, (eds. L. Bissonnette, G. Roy and G. Vallee), p. 125-127, 2002.
• Balis, D., V. Amiridis, C. Zerefos, C. Meleti, A. Kazantzidis, S. Kazadzis, A. Bais, A. Papayannis, G. Chourdakis, “The effect of aerosols on the UV irradiance at the Earth’s surface. Lidar and irradiance measurements during EARLINET”, in: Lidar Remote Sensing in Atmospheric and Earth Sciences, 21th ILRC, Quebec, Canada, 8-12 July, 2002, (eds. L. Bissonnette, G. Roy and G. Vallee), p. 365-368, 2002.
• Galani, E., D. Balis, P. Zanis, C. Zerefos, A. Papayannis, P. Wernli, “Case study of a stratosphere-troposphere exchange (S.T.E.) event over southeastern Mediterranean using a ground-based lidar system” in: Lidar Remote Sensing in Atmospheric and Earth Science, 21th ILRC, Quebec, Canada, 8-12 July, 2002, (eds. L. Bissonnette, G. Roy and G. Vallee), p. 413-416, 2002.
• Bais, A.F., A. Kazantzidis, S. Kazadzis, D. Balis, C.S. Zerefos, C. Meleti “Effects of aerosol optical depth and single scattering albedo on surface UV irradiance”, In: Ultraviolet Ground- and Space-based Measurements, Models and Effects”, Proceedings of SPIE (2002), San Diego, 29 July – 3 August 2001, Vol. 4482, p. 15-22, 2002.
• Zerefos, C.S., K. Eleftheratos, C. Meleti, D. Balis, P. Zanis, G. Tselioudis “Variability of cirrus cloud cover on global scales. The impact of aviation”, Joint International Symposium on Atmospheric Chemistry within the Earth System: From regional pollution to global change”, p. 42, Greece, Crete, Heraklion, 18-25 September 2002.
• Zerefos, C., K. Kourtidis, D. Melas, D. Balis, P. Zanis, L. Katsaros, H.T. Mantis, C. Repapis, I. Isaksen, J. Sundet, J. Herman, P.K. Bhartia, B. Calpini, “Photochemical activity and solar ultraviolet modulation factors: Results for PAUR Projects”, Joint International Symposium on Atmospheric Chemistry within the Earth System: From regional pollution to global change”, p. 510-513, Greece, Crete, Heraklion, 18-25 September 2002.
• Gerasopoulos, E., M. O. Andreae, C. Zerefos, T.W. Andreae, P. Merlet, V. Amiridis, D. Balis, “Climatological aspects of aerosol optical properties in Northern Greece”, Joint International Symposium on Atmospheric Chemistry within the Earth System: From regional pollution to global change”, Greece, Crete, Heraklion, p. 94-95, 18-25 September, 2002.
• Zanis, P., T. Trickl, A. Stohl, H. Wernli, O. Cooper, C. Zerefos, H. Gaggeler, A. Priller, C. Schnabel, H.E. Scheel, H. J. Kanter, L. Tobler, P. Kubik, P. Cristofanelli, C. Forster, P. James, E. Gerasopoulos, A. Delclos, A. Papayannis, “A case study of a successfully forecasted deep STE event over central Europe within the framework of STACCATO”, Joint International Symposium of Atmospheric Chemistry within the Earth System: From regional pollution to global change”, pp. 117-118, Greece, Crete, Heraklion, 18-25 September, 2002.
• Papayannis, A., D. Balis, G. Chourdakis, V. Amiridis, G. Tsaknakis, C. Zerefos, “Regional observations of Saharan dust layers over the Eastern Mediterranean using the LIDAR technique in the frame of the EARLINET project”, Joint International Symposium of Atmospheric Chemistry within the Earth System: From regional pollution to global change”, Greece, Crete, Heraklion, p. 197-198, 18-25 September, 2002.
• Balis, D., V. Amiridis, C. Zerefos, E. Gerasopoulos, A. Papayannis, M. Andreae, “Long-range transported aerosols detected with Raman lidar and filter radiometer measurements”, Joint International Symposium of Atmospheric Chemistry within the Earth System: From regional pollution to global change”, Greece, Crete, Heraklion, p. 251, 18-25 September, 2002.
• Balis, D., C. Zerefos, V. Amoiridis, C. Meleti, A. Bais, A. Kazantzidis, A. Papayannis, G. Chourdakis, G. Tsaknakis, T. Trickl, “Study of the aerosol effect on the UV-B irradiance at the earth’s surface. Cases studies selected from urban sites in the frame of the EARLINET project”, In: J. Aerosol Sci., 32 Suppl. 1, European Aerosol Conference 2001, Leipzig, Germany, September 3-7 p. 391-392, 2001.
• Balis D.S., C. Zerefos, A. Tsiropoulou, P. Taalas, A. Anthis, “Validation of GOME total ozone using ground-based total ozone measurements from the WMO global atmosphere watch”, Prod. of the SAF Ozone Monitoring Training Workshop (Ed. P. Taalas,), Halkidiki 21-23 May, EUMETSAT, p. 19-26, 2001.
• Zerefos, C. “Long-term ozone and UV variations through the year 2000”, IAGA/ICMA/SCOSTEP Workshop on "Long-Term Changes and Trends in the Atmosphere". Prague, 2 – 6 July, 2001 (invited speech).
• Kourtidis, L., C. Zerefos, D. Melas “Regional levels of tropospheric ozone over Eastern Mediterranean”, Proc. Of the 7th Conference on Environemntal Science and Technology, vol. A’, p. 494-498, Ermoupolis, Syros island, 3-6 September 2001.
• Zerefos, C., “Update of climatological changes in ozone and UV-B”, 9th Congress of the European Society for Photobiology, Lillehammer, Norway, 3-8 September, 2001 (Plenary lecture).
• Zerefos, C., “Solar erythemal radiation: its variability in different environments”, 4th General Conference of the Balkan Physical Union, Veliko Turnovo, Bulgaria, 22-25 August, 2000 (invited speaker).
• Zerefos, C., D. Syrakov, K. Ganev, A. Vasaras, K. Kourtidis, M. Tzortziou, M. Prodanova, R. Dimitrova, E. Georgieva, D. Yordanov, N. Miloshev, “Study of the pollution exchange between Bulgaria and Northern Greece”, 4th General Conference of the Balkan Physical Union, Veliko Turnovo, Bulgaria, 22-25 August, 2000.
• Zerefos, C.S., K. Kourtidis, D. Balis, “Variation of Photochemical Activity Over the Mediterranean Under Variable Environmental Conditions”, 5ο International Conference on Environmental Pollution, Thessaloniki, Greece, A. Anagnostopoulos (ed.), p. 1-6, August 28-31 2000.
• Harris, N.R.P., G.T. Amanatidis, G.O. Braathen, J. Burrows, N. Kampfer, E. Kyro, J. Lelieveld, G. Megie, J-P. Pommereau, L. Stefannutti, U. Schumann, R. Zander, C. Zerefos, “Infrastructure used for Stratospheric research in THESEO”, Conference on Research Infrastructure, Strasbourg, Germany, 18-20 September 2000.
• Balis, D.S., C.S. Zerefos, K. Tourpali, R.D. Bojkov, B.R. Bojkov, “The ozone decline during the SOLVE-THESEO 2000 Campaign”, SOLVE-THESEO 2000 Science Meeting, Palermo, Italy, 25-29 September 2000.
• Rex, M., R.J. Salawitch, N.R.P. Harris, P. von der Gathen, G.O. Braathen, A. Schulz, P. Wennberg, M. Chipperfield, B.M. Sinnhuber, E. Reimer, R. Alfier, R. Bevilacqua, K. Hoppel, M. Fromm, J. Lumpe, H. Kullmann, A. Kleinbohl, H. Brermer, M. von Konig, K. Kunzi, D. Toohey, H. Vornel, E. Richard, K. Aikin, H. Jost, J.B. Greenblatt, M. Loewenstein, J.R. Podolske, C.R. Webster, G.J. Flesch, D.C. Scott, R.L. Herman, J.W. Elkins, E.A. Ray, F.L. Moore, D.F. Hurst, P. Romashkin, G.C. Toon, B. Sen, J.J. Margitan, R. Neuber, M. Allart, M. Alpers, B. Bojkov, J. Cisneros, H. Claude, J. Davies, W. Davies, H. De Baker, H. Dier, V. Dorokhov, H. Fast, S. Godin, B. Johnson, Y. Kondo, E. Kyro, Z. Litynska, I.S. Mikkelsen, M.J. Molyneux, E. Moran, G. Murphy, T. Nagai, H. Nakane, C. Parrondo, F. Ravegnani, F.J. Schmidlin, P. Skrivonkova, C. Varotsos, C. Vialle, P. Viatte, V. Yushkov, C. Zerefos, “Z30 Chemical Ozone Loss in Winter 1999-2000”, SOLVE-THESEO 2000 Science Meeting, Palermo, Italy, 25-29 September 2000.
• Zerefos, C.S., “Environmental statistics of the background atmospheric conditions in Greece from project PAUR”, International Seminar “Development of the Environmental Dimension to the Greek Statistics”, Athens, Greece, 9-10 October 2000.
• Zerefos, C., “Observed long-term ozone and UV changes, NATO ASI, Kolympari, Crete, May 1999, In: Chemistry and Radiation Changes in the Ozone Layer, ΝΑΤΟ ASI Series, Vol. 557, pp. 169-177, (Eds. C. Zerefos, I. Isaksen, I. Ziomas), Kluwer Academic Publishers, 2000.
• Kourtidis, K., C. Zerefos, D. Balis, E. Kosmidis, “Overview of concepts and results of the PAUR I and PAUR II projects“, NATO ASI, Kolympari, Crete, May 1999, In: Chemistry and Radiation Changes in the Ozone Layer, ΝΑΤΟ ASI Series, Vol. 557, pp. 55-73, (Eds. C. Zerefos, I. Isaksen, I. Ziomas), Kluwer Academic Publishers, 2000
• Balis, D., C. Zerefos, A. Bais, P. Taalas, N. Vogiatzis, N. Ramos, M. Mihelaraki, A. Anthis, “Four years comparison of GOME and ground-based total ozone measurements”, Proceedings of the Quadrennial Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 295-296, 2000.
• Balis, D., C. Zerefos, F. Karcher, J.P. Meyer, “Comparison of TOVS-HIRS total ozone estimates and ground-based total ozone measurements”, Proceedings of the Quadrennial Proceedings of the Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 297-298, 2000.
• Bojkov, R.D., E. Kosmidis, V. Fioletov, J. DeLuisi, I. Petropavlovskikh, S. Godin, C. Zerefos, “Vertical ozone distribution characteristics deduced from 40,000 re-evaluated Umkehr profiles of 1957-1999 period”, Proceedings of the Quadrennial Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 315-316, 2000.
• Kosmidis, E., R. Bojkov, J. DeLuisi, I. Petropavlovskikh, D. Theisen, C. Zerefos, “Re-evaluation of Raw Umkehr data”, Proceedings of the Quadrennial Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 489-490, 2000.
• Zerefos, C., D. Balis, M. Tzortziou, A. Bais, K. Tourpali, J. Herman, “Interannual natural fluctuations in erythemal doses at ground level”, Proceedings of the Quadrennial Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 737-738, 2000.
• Schulz, A., M. Rex, N. Harris, G. Braathen, E. Kyro, E. Reimer, R. Alfier, I. Kilbane-Dawe, M. Allaart, M. Alpers, B. Bojkov, J. Cisneros, H. Claude, E. Cuevas, J. Davies, H. DeBacker, H. Dier, V. Dorokhov, H. Fast, B. Johnson, B. Kois, Y. Kondo, E. Kosmidis, Z. Litynska, I. Mikkelsen, M. Molyneux, G. Murphy, H. Nakane, F. O’Connor, C. Parrondo, P. Skrivankova, C. Varotsos, C. Vialle, P. Viatte, V. Yushkov, C. Zerefos, P. Von Der Gathen, “Chemical ozone loss rates in the Arctic stratosphere and their dependence on temperatures as determined with MATCH”, Proceedings of the Quadrennial Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 103-104, 2000.
• Godin, S., C. Zerefos, E. Kosmidis, K. Tourpali, E. Cuevas, D. Guzzi, L. Stefanutti, R. Bojkov, J. DeLuisi, I. Petropavlovskikh, D. Theisen, “Reconstruction of vertical ozone distribution from Umkehr estimates (REVUE)”, Proceedings of the Quadrennial Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 69-70, 2000.
• Petropavlovskikh, Ir., J. DeLuisi, D. Theisen, E. Kosmidis, C. Zerefos, R. Bojkov, P.K. Bhartia, “Umkehr retrieval algorithm: on the importance of a priori information”, Proceedings of the Quadrennial Ozone Symposium, Hokkaido University, Sapporo, Japan, 3-8 July 2000, p. 79-80, 2000.
• Rapsomanikis, S., C. Zerefos, D. Melas, N. Tsangas, “Transport of Toxic organic aerosol pollutants from Yugoslavia to Greece during the 1999 conflict”, Proc. of the International Conference: Protection and Restoration of the Environment, Thassos, Greece, (Eds. VA Tsihrintzis, GP Korfiatis, KL Katsifarakis, AC Demetracopoulos, p. 945, July 2000.
• Bojkov, R.D., D. Balis, K. Tourpali, B.R. Bojkov, C.S. Zerefos, ”Characteristics of the ozone decline during THESEO campaign”, Proceedings of the Fifth European Workshop on Ozone Research, p. 55-59, (Eds N.R.P. Harris, M. Guirlet, G.T. Amanatidis), Saint-Jean-de-Luz, 27 September-1 October, 1999. Zerefos, C.S., “Long-term Ozone and UV changes”, ASTAIRE, Bergen, Norway, 22-31 August, 1999 (invited speaker).
• Zerefos, C.S, "Ozone Layer and Solar Activity Relationships", An International Seminar on Current Issues of Astronomical and Planetary Environmental Concern, Thessaloniki, Greece, 6 April 1998 (invited speaker).
• Zerefos, C.S., "Vulnerability of Developing Countries in a Globally Changing Environment", Summer Seminar of Halki 98, "The Environment and Poverty", 14-20 June, 1998 (invited speaker).
• Bojkov, R.D., D. Balis, C. Zerefos, K. Tourpali, M. Tzortziou, T. Kadygrova, "An update of ozone changes in the northern hemisphere through April 1997", 4th European Symp. on Ozone Res., Shliersee, Bavaria, September 1997, p. 185-188, (eds. N.R.P. Harries, I. Likbane-Dawe & G. Amanatidis), 1998.
• Meleti, C., C.S. Zerefos, A.F. Bais, D. Balis, B. Thorkelsson, “Abnormally high UV-B erythemal Doses in Winter-Spring at High Latitudes During SESAME”, in: Polar Stratospheric Ozone, Proc. of the 4th European Workshop, Sept. 1997, Shliersee, Bavaria, Germany, European Commission, Air Pollution Research Report 66, p. 470-473, 1998.
• Balis, D.S., C.S. Zerefos, "Estimating the importance of factors affecting the transmission of the solar UV radiation in the atmosphere", European Conference on Atmospheric UV Radiation, Helsinki, Finland, p. 60, 29 June-2 July 1998.
• Kazadzis, S., A.F. Bais, D.S. Balis, C.S. Zerefos, M. Blumthaler, "Simulation of spectral downwelling actinic flux using a Brewer spectrophotometer", European Conference on Atmospheric UV Radiation, Helsinki, Finland, p. 72, 29 June-2 July 1998.
• Kraus, A., A. Hofzumahaus, A. Kylling, D.S. Balis, C.S. Zerefos, "Solar actinic (scalar) UV flux between ground and 12km altitude: Airborne measurements and modelling", European Conference on Atmospheric UV Radiation, Helsinki, Finland, p. 32, 29 June-2 July 1998.
• Zerefos, C.S., C. Meleti, A.F. Bais, D.S. Balis, "Update of long-term changes in spectral UV-B solar irradiances", European Conference on Atmospheric UV Radiation, Helsinki, Finland, p. 97, 29 June-2 July 1998.
• Zerefos, C.S., P. Fabian, I. Isaksen, B. Krueger, J.-P. Pommereau, A. Hofzumahaus, A.F. Bais, D.S. Balis, T. Berntsen, M. Blumthaler, F. Goutail, E. Kosmidis, K. Kourtidis, A. Kraus, A. Kylling, F. Marenco, C. Meleti, M. Nunes-Pinharanda, A. Papayannis, B. Rappenglueck, V. Santasecaria, R. Schmitt, P. Suppan, K. Tourpali and I. C. Ziomas, "Overview of results from PAUR campaign", European Conference on Atmospheric UV Radiation, Helsinki, Finland, p. 32, 29 June­2 July 1998 (invited speaker).
• Bais, A.F., K. Tourpali, D. Balis, C. Meleti, C. Zerefos, “UVB Forecasting in Greece”, WMO Meeting of Experts on Standardization of UV Indices and the Dissemination to the Public, Les Diablerets, Switzerland, 21-24 July 1997, p. 111-114, 1998.
• Zerefos, C.S., K. Ganev, A. Vasaras, D. Syrakov, K. Kourtidis, M. Tzortziou, M. Prodanova, E. Georgieva, "On the summer episodes of total SO2 content in the air column over the city of Thessaloniki, Greece", 23rd NATO/CCMS International Technical Meeting on Air Pollution Modelling and its Application, p. 175, Varna, Bulgaria, 28 September-2 October, 1998 (invited speaker).
• Zerefos, C.S., “The role of women towards sustainable environment in Southern Europe”, Proceedings of the 1st Balkan Conference, Education and Research within the frame of sustainable development: the case of environment Greece, p. 14, Thessaloniki, November 1998 (invited speaker).
• Zerefos C.S., K. Tourpali, B.R. Bojkov, D. Balis, B. Rognerud and I. Isaksen, "Total ozone and solar activity" in Polar Stratospheric Ozone, Proc. of the 3rd European Arctic Symposium on SESAME, Schliersee, Bavaria, Germany, 18-22 September 1995, Air Pollution Research rep. 56, (Eds J. Pyle, N. Harris, G. Amanatidis), EU, p. 629-632, 1996
• Elansky, N.F., O.V. Postylyakov, I.V. Mitin, A.F. Bais, C.S. Zerefos, "The 'Extended' UMKEHR Method for Retrieving Ozone Profiles from Brewer Observations", in: Atmospheric Ozone, Proc. Quadr. Ozone Symp., L’ Aquila, Italy, 1996, p. 119, (eds. R.D. Bojkov & G. Visconti), 1997.
• Kosmidis, E., C.S. Zerefos, D. Balis, A. Bais, “Testing of the New Brewer UMKEHR algorithm”, in: Atmospheric Ozone, Proc. Quadr. Ozone Symp., L’ Aquila, Italy, 1996, p. 139-142, (eds. R.D. Bojkov & G. Visconti), 1997.
• Bojkov, R.D, D. Balis, C.S Zerefos, K. Tourpali, "Northern Hemisphere Winter-Spring Ozone Changes in 1990-1996", in: Atmospheric Ozone, Proc. Quadr. Ozone Symp., L’ Aquila, Italy, 1996, p. 251-254, (eds. R.D. Bojkov & G. Visconti), 1997.
• Zerefos, C.S., K. Tourpali, I.S.A. Isaksen, B. Rognerud, B.R. Bojkov, C.J.E. Schuurmans, “The Solar Output and Total Ozone”, in: Atmospheric Ozone, Proc. Quadr. Ozone Symp., L’ Aquila, Italy, 1996, p. 279-282, (eds. R.D. Bojkov & G. Visconti), 1997.
• Balis, D.S. A.F. Bais, A. Papayannis, F. Marenco, V. Santasesaria, C.S. Zerefos, “Comparison of model calculations with spectral solar UV measurements”, in: Atmospheric Ozone, Proc. Quadr. Ozone Symp., L’ Aquila, Italy, 1996, p. 837-840, (eds. R.D. Bojkov & G. Visconti), 1997.
• Zerefos, C., “Factors influencing the Transmission of solar ultraviolet irradiance through the Earth’s atmosphere”, p. 133-141, NATO ASI Series, Series I: Global Environmental Change, Vol. 52, (Eds. C. Zerefos & A. Bais), Springer-Verlag, 1997
• Kourtidis, K, I. Ziomas, C. Zerefos, D. Balis, P. Suppan, A. Vasaras, V. Kosmidis, A. Kentarchos, ”On the background ozone values in Greece”, Proc. of the 7th European Symposium on physico-chemical behaviour on atmospheric pollutants, Venice, Italy, October 1996, European Commission, p. 387-390, (eds. B. Larsen, B. Versino & G. Angelleti), Brussels, 1997.
• Zerefos, C.S., “Current aspects on stratospheric ozone depletion and UV-B enhancements”, Eastern Europe and Global Change ENRICH meeting, EC/WMO, Halkidiki, Greece, 3-10 October 1994, EU, (Eds C. Zerefos, A. Ghazi and P. Mathy), Office for Official Publications of the European Communities, 1997 (invited speaker).
• Price, C., G. Tselioudis, C.S. Zerefos, "Forest and Wildland Fire Implications in a Global Environmental Change", In: Forest fire risk and management, Proceedings of the European School of Climatology and Natural Hazards course", Halkidiki, Greece, 27 May - 4 June 1992, EC, p. 285-291, 1997 Ziomas, I.C., P. Tzoumaka, D. Balis, D. Melas, D. Asimakopoulos, G. Sanida, P. Simeonidis, I. Kioutsioukis, C.S. Zerefos, "Numerical Study of a Regional Air Pollution Transport and Photochemistry in Greece", 22nd NATO/CCMS International Technical Meeting on Air Pollution Modelling and its Application, p. 177-183, Clermont-Ferrand, France, 2-6 June 1997.
• Zerefos, C., "Long-term changes of solar UV-B radiation at ground level", JENAM-97, Thessaloniki, Greece, 2-5 July 1997 (invited speaker).
• Zerefos, C.S. and P. Simon, "UV Radiation", Final Review Meeting on the Document "European Research in the Stratosphere: the contribution of EASOE and SESAME to our current understanding of the ozone layer", Brussels, Belgium, July 15-17, 1997 (invited speaker).
• Zerefos, C.S., "Sustainable Development and the Protection of the Environment", Democracy & Development, Europe's Contribution to the Globalization of the Economy", Athens, Greece, 29-31 August 1997 (invited speaker).
• Zerefos, C.S., "Update of Variations of Ozone and Solar Ultraviolet Radiation in Greece", 3rd General Conference of the Balkan Physical Union, Cluj-Napoca, Romania, 2-5 September 1997 (invited paper).
• Zerefos, C.S., “Anemometry in Ancient Greece”, Proceedings of the 1st International Conference on Ancient Greek Technology, Greece, Thessaloniki, 4-7 September 1997 (invited speaker).
• Zerefos, C.S., "Sustainable development in urban centers", Sustainable Urban Environment Implementation and Enforcement Issues, Athens, 9-10 October 1997 (invited speaker).
• Zerefos, C.S., K. Tourpali, “Solar Activity and Total Ozone Relations”, Proceedings of the 1st International Conference “Space Applications and Environment”, Hellenic Astronautical Society, Voula, Greece, 31 October-2 November 1997 (invited speaker).
• Zerefos, C.S., G. Braathen, "Experiences with quasi real-time analysis: Review from the WMO Ozone Mapping Center", Joint ECMWF/WMO Expert Meeting on real-time exchange of ground based ozone measurements, Reading, UK, 17-18 October 1996 (invited speaker).
• Zerefos, C.S., K. Tourpali, A.F. Bais, "Recent Volcanic Signals in the Ozone Layer", in “The Mount Pinatubo Eruption Effects on the Atmosphere and Climate”, (Eds. G. Fiocco and D. Fua), NATO ASI Series, Vol. 142, p. 211-216, Springer-Verlag, 1996.
• Bojkov, R.D., V.E. Fioletov, D.S. Balis, C.S. Zerefos, T.V. Kadygrova, A.M. Shalamjansky, “Northern hemisphere ozone decline during the winter-spring period of 1994-1995”, In: Polar Stratospheric Ozone, (Eds J. Pyle, N. Harris, G. Amanatidis), Proc. of the 3rd European Workshop, Schliersee, Bavaria, Germany, 18-22 September, 1995, p. 446-449, 1996.
• Rex, M., P. von der Gathen, N.R.P. Harris, E. Reimer, A. Beck, R. Alfier, R. Kruger-Carstensen, B.M. Knudsen, I.S. Mikkelsen, M.P. Chipperfield, D. Lucic, M. Allaart, H. De Backer, G.O. Braathen, S. Reid, H. Claude, F. O’Connor, H. Dier, H. Fast, A. Gamma, M. GiIl, S. Godin, M. Guirlet, E. Kyro, M. Rummukainen, Z. Litynska, B. Kois, G. Murphy, F. Ravegnani, C. Varotsos, J. Wenger, V. Yushkov, V. Dorokhov, C. Zerefos, D. Balis, I. Ziomas, “Chemical ozone loss in the Arctic winters 1991/92 and 1994/95 (MATCH)”, In: Polar Stratospheric Ozone, (Eds J. Pyle, N. Harris, G. Amanatidis), Proc. of the 3rd European Workshop, Schliersee, Bavaria, Germany, 18-22 September 1995, p. 586-589, 1996.
• Reid, S.J., P. von der Gathen, M. Rex, E. Reimer, R. Krueger-Carstensen, L.L. De Haan, G.O. Braathen, G. Murphy, J. Wenger, C. Zerefos, C. Varotsos, “The evolution of ozone laminae using the MATCH approach”, In: Polar Stratospheric Ozone, (Eds J. Pyle, N. Harris, G. Amanatidis), Proc. of the 3rd European Workshop, Schliersee, Bavaria, Germany, 18-22 September 1995, p. 586-589, 1996.
• Zerefos, C.S., “The Recent Variability of Atmospheric Ozone in the Middle Latitudes of the Northern Hemisphere and Solar Ultraviolet Radiation”, NATO ASI Series, 132, p. 447-452, (Eds. W.C. Wang and I.S.A. Isaksen), 1995.
• Mohnen, V.A. M. Rummukainen, R.D. Bojkov, D. De Muer, J.P.F. Fortuin, S.O. Haugland, C.M. Liu, A. Marenco, G. Megie, R. Stolarski, P. Taalas, X. Yin, C. Zerefos, X. Zhou, "Session I: Upper Tropospheric /Lower Stratospheric Ozone Climatology", NATO ASI Series, 132, (Eds. W.C. Wang and I.S.A. Isaksen), Springer-Verlag, 1995.
• Bais, A.F., R.D. McPeters, K. Tourpali, C.S. Zerefos, “Preliminary comparison of TOMS version 7 data with the longest available Brewer total ozone record at Thessaloniki, Greece”, International Conference on Ozone in the Lower Stratosphere, p. 3, Halkidiki, Greece, 15-20 May 1995.
• Bais, A.F., M. Blumthaler, B. Gardiner, J. Groebner, T. Svenoe, A.R. Webb, C.S. Zerefos, “Spectral UV measurements over Europe within the SESAME activities”, International Conference on Ozone in the Lower Stratosphere, p. 276, Halkidiki, Greece, 15-20 May 1995.
• Bais, A.F., B. Thorkelsson, C.S. Zerefos, “Comparison of spectral UV fluxes in the arctic circle and at a middle latitude station”, International Conference on Ozone in the Lower Stratosphere, p. 275, Halkidiki, Greece, 15-20 May 1995. Bojkov, R.D., V.E. Fioletov, D.S. Balis, C.S. Zerefos, T.V. Kadygrova, A.M. Shalamjansky, “Record Low Ozone over Siberia in Winter / Spring 1994-95”, International Conference on Ozone in the Lower Stratosphere, p. 10, Halkidiki, Greece, 15-20 May, 1995.
• Harris, N.R.P., G. Ancellet, L. Bishop, D.J. Hofmann, J.B. Kerr, R.D. McPeters, M.M. Prendez, W. Randel, J. Staehelin, B. Subbaraya, A. Volz-Thomas, J.M. Zawodny, C.S. Zerefos, “Ozone measurements and trends reported in chapter 1 of the 1994 WMO/UNEP ozone assessment”, International Conference on Ozone in the Lower Stratosphere, p. 38, Halkidiki, Greece, 15-20 May 1995.
• Rex, M., P. von der Gathen, N.R.P. Harris, E. Reimer, A. Beck, R. Alfier, B.M. Knudsen, I.S. Mikkelsen, M. Chipperfield, D. Lucic, M. Allaart, H. De Backer, G.O. Braathen, S. Reid, H. Claude, F. O’Connor, H. Dier, H. Fast, A. Gamma, M. Gil, M. Guirlet, E. Kyro, M. Rummukainen, Z. Litynska, B. Kois, G. Murphy, F. Ravegnani, C. Varotsos, J. Wenger, V. Yushkov, V. Dorokhov, C.S. Zerefos, D. Balis, I.C. Ziomas, “A lagrangian approach to separate stratospheric chemical ozone loss from dynamical effects: Results for the arctic winter 91-92 and 94-95 (MATCH)”, International Conference on Ozone in the Lower Stratosphere, Halkidiki, Greece, 15-20 May, 1995.
• Zerefos, C.S., K. Tourpali, V. Fioletov, “Further studies on solar activity - ozone relationships”, International Conference on Ozone in the Lower Stratosphere, p. 291, Halkidiki, Greece, 15-20 May 1995 (invited speaker). Ziomas, I.C., D.S. Balis, K. Tourpali, C.S. Zerefos, A.F. Bais, C. Meleti, A. Papayannis, D. Melas, “Estimation of changes in the diurnal peak UV-B dose for significant ozone anomalies over the northern hemisphere”, International Conference on Ozone in the Lower Stratosphere, p. 292, Halkidiki, Greece, 15-20 May, 1995.
• Bais, A.F., C.S. Zerefos, B. Thorkelsson, “Spectral UV measurements in the Arctic circle and at mid-latitudes”, In: Polar Stratospheric Ozone, Proc. of the third European Workshop, 18-22 Sept., 1995, Schliersee, Bavaria, Germany, European Commission, Air pollution Research Report 56, p. 633-637, 1995.
• Ziomas I., P. Tzoumaka, D. Balis, D. Melas, C. Zerefos, “A numerical study of dispersion over the Greater Athens Area during two days of heavy pollution using the Urban Airshed Model”, in Air Pollution Modelling and its Application XI (eds. Gryning and Schiermeier), Proceedings of ITM Conference, p. 549-558, Baltimore USA, 1995.
• Zerefos, C.S. “Status of ozone fields during SESAME”, Schliersee, 1995 (invited speaker).
• Zerefos, C.S., “Status of Ozone fields during EASOE”, Paris, 1994 (invited speaker).
• Zerefos, C.S. “RAVI-WMO meeting: “Current aspects in measured trends in stratospheric ozone and UV-B enhancements”, Oslo, Norway, 2-13 May, 1994 (invited plenary speaker by the Secretary-General).
• Zerefos, C.S. "Results of UV-B measurements", WMO Ozone Workshop, 23-30 June 1994 (invited speaker).
• Zerefos, C., "The Recent UV-B Variability over South-Eastern Europe", International Workshop on Biological UV-Dosimetry, Budapest, Hungary, 29 November- 3 December 1994 (invited speaker).
• Bais, A.F., C.S. Zerefos, “The effect of changes in ozone and cloud cover on solar UV-B radiation at Reykjavik”, in Atmospheric Radiation, Proc. SPIE 2049, p. 263-267, Knut H. Stamnes (ed.), 1993.
• Zerefos, C., "Current aspects on measured trends in stratospheric ozone and UV-B enhancements ", Proc. of the 1st European Symposium on Effects of Environmental UV-B Radiation (eds H. Bauer and C. Nolan), p. 13-16, Munich, Germany, 27-29 October 1993 (invited speaker).
• Zerefos, C., "Ozone trends: an overview", European Symposium on Effects of Environmental UV Radiation, Munich, Germany, 27-29 October 1993 (invited speaker).
• Melas D., I.C. Ziomas, C.S. Zerefos, "A numerical study of air flow in Thessaloniki area", Proc. of the XXI ITM-Meeting, p. 551-552, Valencia, Spain, 29 November-3 December, 1993.
• Melas D., Ziomas I. C., Zerefos C.S., "Numerical simulation of the flow regime in Athens area", Proc. of the XXI ITM-Meeting, p. 541-542, Valencia, Spain, 29 November-3 December, 1993.
• Zerefos, C.S., A.F. Bais, C. Meleti, “UV-B measurements under extreme ozone deficiencies”, International Symposium on Environmental UV Radiation and Health Effects, Munich-Neuherberg, Germany, 4-6 May 1993 (invited speaker).
• Zerefos, C.S., "Ozone Trends", Poster Session, 2nd European Symposium on Polar Stratospheric Ozone, Schliersee, Bavaria, Germany, 29 September - 2 October 1992 (invited speaker).
• Bais, A.F., C.S. Zerefos, C. Meleti, I.C. Ziomas, “Comparison of UV-B measurements performed with a Brewer spectrophotometer and a new UVB-1 broad band detector”, In: Ozone in the Troposphere and Stratosphere, Proc. Quadr. Ozone Symp., p. 786, Virginia, USA, 1992.
• Zerefos, C.S., D.S. Balis, A.F. Bais, I.C. Ziomas, K. Tourpali, C. Meleti, P. Tzoumaka, H.T. Mantis, C.C. Repapis, V. Fioletov, V. Khattatov, R.D. Bojkov, “The evolution of synoptic ozone anomalies during the European Arctic Stratospheric Ozone Experiment in winter 1991-92”, In: Ozone in the Troposphere and Stratosphere, (ed. R.D. Hudson), Proc. Quadr. Ozone Symp., p. 535-539, Virginia, USA, 1992 (invited speaker).
• Zerefos, C.S., I.C. Ziomas, A.F. Bais, L. Katsaros, C. Meleti, P. Tzoumaka, “Development of a national network for monitoring background environmental parameters in Greece”, In: Geophysics and Environment: Background air pollution, “Bolletino Geophysico”, 15, 5, p. 17-25, Rome, Italy, June 1992 (invited speaker).
• Bais, A.F., C. Meleti, C. Zerefos, I. Ziomas, "Solar Ultraviolet Radiation Spectral Measurements with the Brewer Spectrophotometer", Proc. of the 1st General Conference of the Balkan Physical Union, p. 284-288, Thessaloniki, Greece, September 1991.
• Zerefos, C.S., K. Tourpali, C.C. Repapis, "ENSO Signal in Summer Easter Mediterranean temperature records", Proc. 1st General Conference of the Balkan Physical Union, p. 351-354, Thessaloniki, Greece, 26-28 September, 1991.
• Ziomas, I.C., C. Zerefos, A. Bais, D. Balis, C. Meleti, K. Tourpali, A. Denezakos, "Temporal and Spatial Variations of Air Pollution in the Valley of Ptolemaida, Greece", Proc. of the 1st General Conference of the Balkan Physical Union, p. 251-256, Thessaloniki, Greece, September 1991.
• Ziomas, I.C., P.N. Tzoumaka, A.F. Bais, C.S. Zerefos, M.I. Petrakakis, "Air Pollution Levels and their Relation to Meteorological Conditions in the Atmosphere of Thessaloniki, Greece", Proc. of the 1st General Conference of the Balkan Physical Union, p. 323-329, Thessaloniki, Greece, September 1991.
• Zerefos, C., "Current Issues of Concern to our Atmospheric Environment", Proc. of the 1st General Conference of the Balkan Physical Union, Thessaloniki, Greece, 26-28 September 1991 (invited speaker).
• Zerefos, C.S. "Air Pollution in Thessaloniki: An overview", Monitoring and Modelling in the Mesoscale, Seminar in the Framework of the Scientific Cooperation between the Federal Republic of Germany and Greece, Thessaloniki, Greece, 27 September 1991 (invited speaker).
• Amanatidis, G., C.S. Zerefos, A.F. Bais, I.C. Ziomas, A. Kelessis, “Two years of regular stratospheric NO2 measurements at Thessaloniki, Greece using twilight photometry”, In: Ozone in the Atmosphere, Proc. Quadr. Ozone Symp., p. 335-339,. Gottingen FRG, 1988, R.D. Bojkov and P. Fabian (Eds), A. Deepak Pub. 1989.
• Bais, A.F., A. Kelessis, I.C. Ziomas, C.S. Zerefos, G. Amanatidis, K. Tourpali, “Six years of total ozone observations with a Brewer Spectrophotometer at Thessaloniki, Greece”, In: Ozone in the Atmosphere, Proc. Quadr. Ozone Symp., p. 713-716, Gottingen FRG, 1988, R.D. Bojkov and P. Fabian (Eds), A. Deepak Pub. 1989.
• Zerefos, C.S., A.F. Bais, I.C. Ziomas, A. Paliatsos, G. Amanatidis, K. Tourpali, “Review of trends in air pollutants in Greece”, WMO Technical Conference on the Monitoring and Assessment of Changing Composition of the Troposphere, Sofia, Bulgaria, WMO Special Environmental Report #17, 724, p. 47-49, WMO, 1989 (invited paper).
• Zerefos, C.S. "On the dispersion of hazardous pollution in the air (An example for the fire in the oil terminal"), Seminar for the Industrial Installations Inspectors of the Member States, Commission of the European Communities, General Direction of the Environment DGXI, Athens, 30 September - 2 October 1987 (invited paper)
• Zerefos, C.S., "Solar Ultraviolet Absorption by Sulfur Dioxide in Thessaloniki", Seminar: Atmospheric Environment Service (AES), Ontario, Canada, 6 August 1985 (invited talk).
• Bais, A.F., C.S. Zerefos, I.C. Ziomas, N. Zoumakis, H.T. Mantis, D. Hofmann, G. Fiocco, “Decreases in the ozone and the SO2 columns following the appearance of the El Chichon aerosol cloud at midlatitudes”, In: Atmospheric Ozone, Proc. Quadr. Ozone Symp., 1984, p. 353-356, Reidel, (Eds. C.S. Zerefos & A. Ghazi), 1985.
• Mariolopoulos, E., C. Repapis, C.S. Zerefos, C. Varotsos, I.C. Ziomas, A.F. Bais, “A neglected long-term series of ground-level ozone”, In: Atmospheric ozone, Proc. Quadr. Ozone Symp., 1984, p. 788-790, Reidel, (Eds C.S. Zerefos & A. Ghazi), 1985.
• Zerefos, C.S., A.F. Bais, I.C. Ziomas, “Monochromatic UV magnification factors and total ozone”, In: Atmospheric Ozone, Proc. Quadr. Ozone Symp., 1984, p. 686-690, Reidel, (Eds. C.S. Zerefos & A. Ghazi), 1985.
• Zerefos, C.S., I.C. Ziomas, A.F. Bais, “Variability of the vertical ozone distribution”, In: Atmospheric Ozone, Proc. Quadr. Ozone Symp., 1984, p. 269-273, Reidel, (Eds. C. Zerefos & A. Ghazi), 1985.
• Zerefos, C.S., A.F. Bais, I. Ziomas, "Urban and non-Urban UV magnification factors of direct solar radiation in the UV-B region", In: Stratosphere, Proc. of a Working Party Meeting, p. 125-138, Commission of the European Communities, A. Ghazi (Ed), Brussels 1984, (invited paper).
• Zerefos, C.S., "Evidence of the El Chichon stratospheric volcanic cloud in northern Greece”, International Union of Geodesy and Geophysics, XVII Meeting, Hamburg, Germany, August 1983 (invited paper).
• Zerefos, C.S., R. Jenne, C. Repapis "New results on the representativeness of the hemispheric total ozone trends: A seven year intercomparison between ground-based observations and the BUV experiment", Proc. of the 3rd Scientific Assembly, p. 16, IAMAP, Hamburg, 17-28 August, 1981.
• Zerefos, C.S., C.C. Repapis, I. Ziomas, "Search for total ozone responses to solar and geomagnetic activity", Proced. Quadr. International Ozone Symposium, Boulder, Colorado, USA, 4-9 August, Vol. II, p. 1091-1097, J. London (ed.), 1980.
• Zerefos, C.S., "Short period oscillations in wintertime atmospheric vorticity patterns and the geomagnetic field” 8th International Interdisciplinary Cycle Research Symposium, Trier, FRG, p. 181-185, July 1980. Zerefos, C.S., “A study of the inferred interplanetary magnetic field polarity" 8th International Interdisciplinary Cycle Research Symposium, Trier, FRG, p. 205-215, July 1980.
• Zerefos, C., "A Global study on meteorological periodicities", Seventh International Interdisciplinary Cycle Research Symposium, Bad Hamburg, FRG, p. 230-233 July 1976.
• Zerefos, C.S., H.T. Mantis, "Hemispheric variations in stratospheric temperatures from 1957 to 1972", Collection of Extended Summaries of Contributions Presented at Joint Assembly Seattle, p. 38-1, Washington, CMUA Sessions IAGA/IAMAP, Boulder, USA, 22 August-3 September 1977
• Zerefos, C., "Suggested mechanism on solar-weather links", XVI IUGG General Assembly, Grenoble, September 1975 (invited paper).
• Papagiannis, D., C. Zerefos, C. Repapis, "Evidence of a double peak in solar maxima", Proc. of the First European Astronomical Meeting, Athens, Greece, September 4-9, 1972, Ιn: Solar Activity and Related Interplanetary and Terrestrial Phenomena, vol. 1, p. 75, (Ed. J. Xanthakis), Springer Verlag, 1973