Oceans and Atmosphere (OA)

• OA1 The thermohaline circulation

Convener: A. Colin de Verdiere (Brest), Co-Convener: F. Schott (Kiel)
• OA2 Processes in regions of oceanic time series stations

Convener: T.J. Müller (Kiel), Co-Convener: R. Lukas (Honolulu)
• OA3 The North Atlantic Oscillation: decadal variability in ocean and atmosphere

Convener: A. Hense (Bonn), Co-Conveners: S. Rahmstorf (Potsdam), G. Reverdin (Toulouse)
• OA4 Circulation variability at mesoscale

Convener: C. Millot (La Seyne), Co-Convener: A.M. Treguier (Plouzane)
• OA5 Open session on coastal/shelf-sea dynamics

Convener: A. Lehmann (Kiel), Co-Convener: G.I. Shapiro (Moscow)
• OA6 Dynamics of the polar ocean and its coupling to sea ice

Convener: A.J. Willmott (Staffordshire), Co-Convener: P. Lemke (Kiel)
• OA7 Antarctic ocean circulation: observations and models

Convener: A. Beckmann (Bremerhaven), Co-Convener: M.A. Garcia (Barcelona)
• OA8 The Mediterranean Sea: general circulation variability and related processes

Convener: N. Pinardi (Bologna), Co-Convener: U. Send (Kiel)
• G5 Ocean modelling from altimetry and remote sensing (joint with OA)

Convener: P. Knudsen (Copenhagen), Co-Convener: P.Y. Le Traon (Ramonville Saint-Agne)
• OA9 Basic turbulence studies

Convener: A. Petrosyan (Moscow), Co-Convener: T. Gerz (Wessling)
• OA10 Fluxes over terrestrial surfaces

Convener: N.O. Jensen (Roskilde)
• 01 Surface fluxes in non-homogeneous terrain

Convener: T. Foken (Bayreuth)
• 02 Long term measurements of surface fluxes

Convener: R. Valentini (Viterbo)
• OA11 Mesoscale transport of air pollution, including land/sea areas

Convener: B. Artinano (Madrid), Co-Convener: T. Mikkelsen (Roskilde)
• OA12 Extreme weather events in the Mediterranean

Convener: F. Prodi (Bologna), Co-Convener: A.E. Eidelman (Beer-Sheva)
• OA13 Cyclogenesis and fronts: FASTEX

Convener: J.-P. Chalon (Toulouse), Co-Convener: A.J. Thorpe (Reading)
• OA14 Parametrizations in large scale atmospheric models

Convener: P. Viterbo (Reading)
• 01 Intercomparison and validation of the ocean-atmosphere flux fields

Convener: S. Gulev (Moscow), Co-Convener: P.K. Taylor (Southampton)
• 02 Major systematic errors in global coupled models

Convener: D.B. Stephenson (Toulouse), Co-Convener: M. Balmaseda (Reading)
• 03 Sensitivity of radiative pertubations in global coupled models

Convener: O. Boucher (Villeneuve d'Ascq)
• ST2 Open session on the middle atmosphere (joint with OA)

Convener: M. Dameris (Wessling), Co-Convener: B.C. Krüger (Lausanne)
• ST16 Stratosphere-troposphere-exchange (joint with OA)

Convener: V. Wirth (München), Co-Convener: P.H. Haynes (Cambridge)
• OA15 Clouds and their impact on radiation and photo-chemical processes

Convener: E. Raschke (Geesthacht)
• 01 Remote sensing of cloud field properties

Convener: E. Raschke (Geesthacht)
• 02 Sensitivity studies and uncertainty analyses in cloud microphysical modelling

Convener: N. Mölders (Leipzig)
• 03 Cloud effects on radiation energy transfer within the atmosphere

Convener: A. Ohmura (Zürich)
• 04 Photo-chemical processes in clouds

Convener: A.I. Flossmann (Aubiere)
• OA16 Interaction of biogenic and anthropogenic compouds in the Mediterranean and its influence on atmospheric chemistry

Convener: G. Seufert (Ispra), Co-Convener: N. Hewitt (Lancaster)
• OA17 Climate variability: models and observations (co-sponsored by SE)

Convener: G.J. Komen (De Bilt)
• 01 West African monsoon studies

Convener: C.D. Thorncroft (Reading)
• 02 Natural climate variability on the basis of past observations

Convener: J.-C. Duplessy (Gif-sur-Yvette)
• 03 Climate variability: time scale interactions

Convener: J.M. Slingo (Reading)
• 04 Clouds in the climate system: observations and modelling

Convener: M. Desbois (Palaiseau)
• 05 Prediction and detection of anthropogenic climate change

Convener: T.C. Johns (Bracknell)
• ST14 Solar imprints in terrestrial archives (joint with OA)

Convener: G. Cini-Castagnoli (Torino)
• OA18 Heterogeneous and homogeneous chemistry of reactive halogen compounds in the lower troposphere (co-sponsored by ST)

Convener: U. Platt (Heidelberg), Co-Convener: G.K. Moortgat (Mainz)
• OA19 Free-radicals in the troposphere (co-sponsored by ST)

Convener: H.-P. Dorn (Jülich), Co-Convener: A. Volz-Thomas (Jülich)
• OA27 Marine tropospheric chemistry

Convener: T. Brauers (Juelich), Co-Convener: O. Schrems (Bremerhaven)
• OA20 Radiogenic isotopes as tracers of source-areas for aerosols, suspended matter and sediments (co-sponsored by ST)

Convener: F.E. Grousset (Talence), Co-Convener: F. Sirocko (Potsdam)
• OA21 Biogeochemical interactions in the coastal marine environment

Convener: A. Monaco (Perpignan), Co-Convener: N.B. Price (Edinburgh)
• NP3.04 Biological processes and mixing in the ocean (joint with OA)

Convener: K.J. Richards (Southampton)
• NP3.05 Transport and mixing of chemical species in the atmosphere, including urban and regional problems in the troposphere and global-scale problems in the troposphere and stratosphere (joint with OA & ST)

Convener: P.H. Haynes (Cambridge)
• OA22 Biogeochemical processes in submarine hydrothermal systems along the Hellenic Volcanic Island Arc

Convener: S. Varnavas (Patras), Co-Convener: P.R. Dando (Gwynedd)
• ST15 Atmospheric ozone (joint with OA)

Convener: M.-M. Hirschberg (Freising/Weihenstephan)
• 01 Modelling and validation with satellite data

Convener: I.M. Vardavas (Crete), Co-Convener: F.W. Taylor (Oxford)
• 02 Polar ozone

Convener: A.A. Krivolutsky (Dolgoprudny)
• 03 Changes in UV-B radiation

Convener: B.C. Krüger (Lausanne)
• 04 Tropospheric ozone with emphasis on the Mediterranean region

Convener: C. Varotsos (Athens)
• 05 Ozone as a climate gas

Convener: K.P. Shine (Reading), Co-Convener: D.A. Hauglustaine (Paris)
• ST17 Aviation and space flight (joint with OA)
• 01 Aviation impact on the atmosphere

Convener: H. Kelder (De Bilt), Co-Convener: R. Sausen (Wessling)
• 02 Weather impact on aviation

Convener: T. Hauf (Wessling), Co-Convener: A. Corjon (Toulouse)
• 03 Air traffic meteorology

Convener: J.-C. André (Toulouse), Co-Convener: J.-M. Carriere (Toulouse)
• OA23 Operational oceanography: existing systems, developments and future potential

Convener: R.A. Flather (Merseyside), Co-Convener: M. Bohle-Carbonell (Brussels)
• OA24 Marine data management: assimilation, hind-casting and nowcasting

Convener: G. Evensen (Solheimsviken), Co-Convener: H. Gerritsen (Delft)
• OA25 Developments in weather forecasting

Convener: N. Gustafsson (Norrköping), Co-Convener: P. Benard (Toulouse)
• OA26 Will the probabilistic approach be the future for numerical weather predictions?

Convener: R. Buizza (Reading), Co-Convener: Z. Toth (Camp Springs, MD)
• NP1.03 Scaling, multifractals and nonlinearity in oceans & atmosphere (joint with OA)

Convener: F. Schmitt (Brussels), Co-Conveners: R.F. Cahalan (Greenbelt, MD), V.V. Yanovsky (Kharkov)
• NH2.03 Flood hazards and flood risk: regional analysis of extremes (joint with OA)

Convener: P. Bois (St. Martin d'Heres), Co-Convener: V. Oancea (Bucharest)