%0 Journal Article
%A Lemmen, C.
%A Dameris, M.
%A Müller, R.
%A Riese, M.
%T Chemical ozone loss in a chemistry-climate model from 1960 to 1999
%J Geophysical research letters
%V 33
%@ 0094-8276
%C Washington, DC
%I American Geophysical Union
%M PreJuSER-52292
%P L15820
%D 2006
%Z Record converted from VDB: 12.11.2012
%X In the recent WMO assessment of ozone depletion, the minimum ozone column is used to assess the evolution of the polar ozone layer simulated in several chemistry-climate models (CCMs). The ozone column may be strongly influenced by changes in transport and is therefore not well-suited to identify changes in chemistry. The quantification of chemical ozone depletion can be achieved with tracer-tracer correlations (TRAC). For forty Antarctic winters ( 1960 - 1999), we present the seasonal chemical depletion simulated with the ECHAM4. L39(DLR)/CHEM model. Analyzing methane - ozone correlations, we find a mean chemical ozone loss of 80 +/- 10 DU during the 1990s, with a maximum of 94 DU. Compared to ozone loss deduced from HALOE measurements the model underestimates chemical loss by 37%. The average multidecadal trend in loss from 1960 to 1999 is 17 +/- 3 DU per decade. The largest contribution to this trend comes from the 62 +/- 11 DU ozone loss increase between the 1970s and 1990s.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000239786500007
%R 10.1029/2006GL026939
%U https://juser.fz-juelich.de/record/52292