Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 4 5 2004 10.5194/acpd-4-6667-2004 http://www.atmos-chem-phys-discuss.net/4/6667/2004/ http://www.atmos-chem-phys-discuss.net/4/6667/2004/acpd-4-6667-2004.html http://www.atmos-chem-phys-discuss.net/4/6667/2004/acpd-4-6667-2004.pdf 6667 6689 2004-10-19 Vortex-averaged Arctic ozone depletion in the winter 2002/2003 T. Christensen tic@dmi.dk B. M. Knudsen M. Streibel S. B. Andersen A. Benesova G. Braathen H. Claude J. Davies H. de Backer H. Dier V. Dorokhov M. Gerding M. Gil B. Henchoz H. Kelder R. Kivi E. Kyrö Z. Litynska D. Moore G. Peters P. Skrivankova R. Stübi T. Turunen G. Vaughan P. Viatte A. F. Vik P. von der Gathen I. Zaitcev Danish Meteorological Institute, Copenhagen, Denmark Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany Czech Hydrometeorological Institute, Prague, Czech Republic Norwegian Institute for Air Research, Kjeller, Norway Deutscher Wetterdienst, Hohenpeißenberg, Germany Environment Canada, Downsview, Ontario, Canada Royal Meteorological Institute, Brussels, Belgium Deutscher Wetterdienst, Lindenberg, Germany Central Aerological Observatory, Dolgoprudny, Moscow Region, Russia Leibniz-Institue of Atmospheric Physics, Kühlungsborn, Germany Instituto Nacional de Téchnica Aerospacial, Madrid, Spain MeteoSwiss, Payerne, Switzerland Royal Netherlands Meteorological Institute, De Bilt, Netherlands Finnish Meteorological Institute, Sodankylä, Finland IMWM, Centre of Aerology, Legionowo, Poland UK Met Office, Exeter, UK University of Wales, Aberystwyth, UK A total ozone depletion of 68 Dobson units from 10 December 2002 to 10 March 2003 is derived by the vortex-average method taking into account both diabatic descent of the air masses and transport of air into the vortex. When the vortex is divided into three equal-area regions, the results are 85 DU for the collar region (closest to the edge), 52 DU for the vortex centre and 68 DU for the middle region in between centre and collar.