Vortex-averaged Arctic ozone depletion in the winter 2002/2003

• Main Authors: Christensen, T., Knudsen, B. M., Streibel, M., Andersen, S. B., Benesova, A., Braathen, G., Claude, H., Davies, J., de Backer, H., Dier, H., Dorokhov, V., Gerding, M., Gil, M., Henchoz, B., Kelder, H., Kivi, R., Kyrö, E., Litynska, Z., Moore, D., Peters, G., Skrivankova, P., Stübi, R., Turunen, T., Vaughan, G., Viatte, P., Vik, A. F., von Der Gathen, P., Zaitcev, I.
• Other Authors: Danish Meteorological Institute (DMI), Department of Bentho-pelagic processes, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI), Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association, Czech Hydrometeorological Institute (CHMI), Norwegian Institute for Air Research (NILU), Deutscher Wetterdienst Offenbach (DWD), Environment and Climate Change Canada, Institut Royal Météorologique de Belgique Bruxelles - Royal Meteorological Institute of Belgium (IRM), Central Aerological Observatory (CAO), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), Leibniz-Institut für Atmosphärenphysik (IAP), Universität Rostock-Leibniz Association, Instituto Nacional de Téchnica Aerospacial, Federal Office of Meteorology and Climatology MeteoSwiss, Royal Netherlands Meteorological Institute (KNMI), Finnish Meteorological Institute (FMI), IMWM, United Kingdom Met Office Exeter, University of Wales
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2005
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; Arctic
• Online Access: https://hal.science/hal-00295587; https://hal.science/hal-00295587/document; https://hal.science/hal-00295587/file/acp-5-131-2005.pdf

International audience A total ozone depletion of 68±7 Dobson units between 380 and 525K from 10 December 2002 to 10 March 2003 is derived from ozone sonde data 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±9DU for the collar region (closest to the edge), 52±5DU for the vortex centre and 68±7DU for the middle region in between centre and collar. Our results compare well with other studies: We find good agreement with ozone loss deduced from SAOZ data, with results inferred from POAM III observations and with results from tracer-tracer correlations using HF as the long-lived tracer. We find a higher ozone loss than that deduced by tracer-tracer correlations using CH 4 . We have made a careful comparison with Match results: The results were recalculated using a common time period, vortex edge definition and height interval. The two methods generally compare very well, except at the 475K level which exhibits an unexplained discrepancy.