CC BY-NC-SA 2.5 UnportedChristensen, 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.2018-03-102019-06-262005https://doi.org/10.34657/1405https://oa.tib.eu/renate/handle/123456789/783A 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 CH4. 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.application/pdfenghttps://creativecommons.org/licenses/by-nc-sa/2.5/550Article