Journal Article

PreJuSER-52292

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Chemical ozone loss in a chemistry-climate model from 1960 to 1999

Lemmen, C.FZJ* ; Dameris, M. ; Müller, R.FZJ* ; Riese, M.FZJ*

2006
American Geophysical Union Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/20805  doi:10.1029/2006GL026939

Abstract: 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.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Stratosphäre (ICG-I)
2. Jülich-Aachen Research Alliance - Simulation Sciences (JARA-SIM)

Research Program(s):

1. Atmosphäre und Klima (P22)

Appears in the scientific report 2006

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Database coverage:

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