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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, L15820-1-L15820-5. 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.

Document Type:Article
Title:Chemical ozone loss in a chemistry-climate model from 1960-1999
AuthorsInstitution or Email of Authors
Lemmen, CarstenFZ Jülich, Jülich
Dameris, MartinUNSPECIFIED
Müller, RolfFZ Jülich, Jülich
Riese, MartinFZ Jülich, Jülich
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:L15820-1-L15820-5
Keywords:Stratosphäre, Ozon, numerische Modellierung
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
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)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Prof. Dr. rer. nat. Martin Dameris
Deposited On:13 Sep 2007
Last Modified:11 Nov 2014 21:56

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