Chemical ozone loss in a chemistry-climate model from 1960-1999
Lemmen, Carsten and Dameris, Martin and Müller, Rolf and Riese, Martin (2006) Chemical ozone loss in a chemistry-climate model from 1960-1999. Geophysical Research Letters, 33, . DOI: 10.1029/2006GL026939.
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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.
|Title:||Chemical ozone loss in a chemistry-climate model from 1960-1999|
|Journal or Publication Title:||Geophysical Research Letters|
|In ISI Web of Science:||Yes|
|Keywords:||Stratosphäre, Ozon, numerische Modellierung|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||W - Vorhaben Atmosphären- und Klimaforschung (old)|
|Institutes and Institutions:||Institute of Atmospheric Physics > Atmospheric Dynamics|
|Deposited By:||Prof. Dr. rer. nat. Martin Dameris|
|Deposited On:||13 Sep 2007|
|Last Modified:||27 Apr 2009 13:15|
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