Atmospheric Conditions Associated with High and Low Ozone Concentrations in the Boundary Layer and the Lower Troposphere over the Eastern Mediterranean (Aegean Sea)
In this study the vertical ozone profiles during summertime (June to August) of the MOZAIC (Measurement of Ozone and Water Vapor by Airbus in Service Aircraft) Project over the eastern Mediterranean airports of Heraklion and Rhodes in Greece, have been analyzed in order to identify the major factors determining the ozone variability in the lower troposphere and the boundary layer over this area. In total 42 ozone profiles have been examined, which have been collected during a 10-year period (1996–2006). The corresponding vertical profiles of temperature, relative humidity and carbon monoxide have been also examined in parallel. It comes out that in the lower troposphere and to a certain extent within the boundary layer the role of the synoptic weather conditions and the associated large-scale transport of air masses seems to be more important in understanding the ozone variability than the local or regional short-term ozone photochemical production, for the examined area.
KeywordsWind Speed Ozone Concentration Lower Troposphere Ozone Level High Ozone
The operators of the MOZAIC project (Dr. A. Volz-Thomas – Forschugszentrum Juelich, Germany, J.-P. Cammas and V. Thouret, Laboratoire d’Aerologie, CNRS and Universite de Toulouse, France) are gratefully acknowledged for providing data. Dr. C. Repapis (Academy of Athens and Mariolopoulos-Kanaginis foundation) is also acknowledged for helpful discussions and comments on the manuscript.
- Kallos G (1995) Transport and transformation of air pollutants from Europe to the east Mediterranean region. Progress report, contract AVI-CT92-0005. European Commission on Environmental Research Programme Avicenne, Brussels.Google Scholar
- Kourtidis K, Zerefos C, Rapsomanikis S, Simeonov V, Balis D, Perros PE, Thomson AM, Witte J, Calpini B, Sharobiem WM, Papayannis A, Mihalopoulos N, Drakou R (2002) Regional levels of ozone in the troposphere over eastern Mediterranean. J Geophys Res 107(D18):8140. doi: 10.1029/2000JD000140 CrossRefGoogle Scholar
- Kouvarakis G, Vrekoussis M, Mihalopoulos N, Kourtidis K, Rappenglueck B, Gerasopoulos E, Zerefos C (2002) Spatial and temporal variability of tropospheric ozone in the boundary layer above the Aegean Sea (eastern Mediterranean). J Geophys Res 107(D18):8137. doi: 10.1029/2000JD000081 CrossRefGoogle Scholar
- Marenco A, Thouret V, Nedelec P, Smit H, Helten M, Kley D, Karcher F, Simon P, Law K, Pyle J, Poschmann G, Von Wrede R, Hume C, Cook T (1998) Measurements of ozone and water vapor by Airbus in-service aircraft: the MOZAIC airborne program, An overview. J Geophys Res 103:25631–25642. doi: 10.1029/98JD00977 CrossRefGoogle Scholar
- Volz-Thomas A, Beekmann M, Derwent D, Law K, Lindskog A, Prevot A, Roemer M, Schultz M, Schurath U, Solberg S, Stohl A (2003) Tropospheric ozone and its control. In: Midgley et al. (Eds.) EUROTRAC-2 Final report, Part 1, Margraf Verlag, WeikersheimGoogle Scholar
- Zerefos CS, Kourtidis KA, Melas D, Balis D, Zanis P, Katsaros L, Mantis HT, Repapis C, Isaksen I, Sundet J, Herman J, Bhartia PK, Calpini B (2002) Photochemical Activity and Solar Ultraviolet Radiation (PAUR) modulation factors: an overview of the project. J Geophys Res 107(D18):8134, doi: 10.1029/2000JD00134 CrossRefGoogle Scholar