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

T. Christensen, 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. PetersP. Skrivankova, R. Stübi, T. Turunen, G. Vaughan, P. Viatte, A.F. Vik, P. von der Gathen, I. Zaitcev

Research output: Contribution to journalArticleResearchpeer-review

21 Citations (Scopus)

Abstract

A total ozone depletion of 68±7 Dobson units between 380 and 525 K 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±9 DU for the collar region (closest to the edge), 52±5 DU for the vortex centre and 68±7 DU for the middle region in between centre and collar. Our result s 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 CH4. We have made a carefu l 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 475 K level which exhibits an unexplained discrepancy. European Geosciences Union

Original languageEnglish
Pages (from-to)131-138
Number of pages8
JournalAtmospheric Chemistry and Physics
Volume5
Issue number1
DOIs
Publication statusPublished - 21 Jan 2005
Externally publishedYes

Programme Area

  • Programme Area 5: Nature and Climate

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