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Radiative forcing since preindustrial times due to ozone change in the troposphere and the lower stratosphere

Gauss, Michael and Myhre, G. and Isaksen, I.S.A. and Grewe, Volker and Pitari, G. and Wild, O. and Collins, W.J. and Dentener, F.J. and Ellingsen, K. and Gohar, L.K. and Hauglustaine, D.A. and Iachetti, D. and Lamarque, J.-F. and Mancini, E. and Mickley, L.J. and Prather, M.J. and Pyle, J.A. and Sanderson, M.G. and Shine, K.P. and Stevenson, D.S. and Sudo, K. and Szopa, S. and Zeng, G. (2006) Radiative forcing since preindustrial times due to ozone change in the troposphere and the lower stratosphere. Atmospheric Chemistry and Physics, 6, pp. 575-599.

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Official URL: http://www.copernicus.org/EGU/acp/acp/6/575/acp-6-575.pdf


Changes in atmospheric ozone have occurred since the preindustrial era as a result of increasing anthropogenic emissions. Within ACCENT, a European Network of Excellence, ozone changes between 1850 and 2000 are assessed for the troposphere and the lower stratosphere (up to 30 km) by a variety of seven chemistry-climate models and three chemical transport models. The modeled ozone changes are taken as input for detailed calculations of radiative forcing. When only changes in chemistry are considered (constant climate) the modeled global-mean tropospheric ozone column increase since preindustrial times ranges from 7.9 DU to 13.8 DU among the ten participating models, while the stratospheric column reduction lies between 14.1 DU and 28.6 DU in the models considering stratospheric chemistry. The resulting radiative forcing is strongly dependent on the location and altitude of the modeled ozone change and varies between 0.25 Wm<sup>−2</sup> and 0.45 Wm<sup>−2</sup> due to ozone change in the troposphere and −0.123 Wm<sup>−2</sup> and +0.066 Wm<sup>−2</sup> due to the stratospheric ozone change. Changes in ozone and other greenhouse gases since preindustrial times have altered climate. Six out of the ten participating models have performed an additional calculation taking into account both chemical and climate change. In most models the isolated effect of climate change is an enhancement of the tropospheric ozone column increase, while the stratospheric reduction becomes slightly less severe. In the three climate-chemistry models with detailed tropospheric and stratospheric chemistry the inclusion of climate change increases the resulting radiative forcing due to tropospheric ozone change by up to 0.10 Wm<sup>−2</sup>, while the radiative forcing due to stratospheric ozone change is reduced by up to 0.034 Wm<sup>−2</sup>. Considering tropospheric and stratospheric change combined, the total ozone column change is negative while the resulting net radiative forcing is positive.

Document Type:Article
Title:Radiative forcing since preindustrial times due to ozone change in the troposphere and the lower stratosphere
AuthorsInstitution or Email of Authors
Gauss, MichaelUniv. of Oslo, Oslo, N
Myhre, G.Univ. of Oslo, Oslo, N
Isaksen, I.S.A.Univ. of Oslo, Oslo, N
Pitari, G.Univ. de L’Aquila, Coppito, L’Aquila, I
Wild, O.JAMSTEC, Yokohama, J
Collins, W.J.Met Office, Exeter, Devon, UK
Dentener, F.J.Joint Research Centre, Ispra, I
Ellingsen, K.Univ. of Oslo, Oslo, N
Gohar, L.K.Univ. of Reading, Reading, UK
Hauglustaine, D.A.LSCE, Gif-sur-Yvette, F
Iachetti, D.Univ. de L’Aquila, Coppito, L’Aquila, I
Lamarque, J.-F.NCAR, Boulder, CO, USA
Mancini, E.Univ. de L’Aquila, Coppito, L’Aquila, I
Mickley, L.J.Harvard Univ., Cambridge, MA, USA
Prather, M.J.Univ. of California, Irvine, USA
Pyle, J.A.Cambridge Univ., Cambridge, UK
Sanderson, M.G.Met Office, Exeter, Devon, UK
Shine, K.P.Univ. of Reading, Reading, UK
Stevenson, D.S.Univ. of Edinburgh, Edinburgh, UK
Sudo, K.JAMSTEC, Yokohama, J
Szopa, S.LSCE, Gif-sur-Yvette, F
Zeng, G.Cambridge Univ., Cambridge, UK
Date:February 2006
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 575-599
Keywords:IPCC, ozone changes, pre-industrial, climate-chemistry interations
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: Dr.rer.nat. Volker Grewe
Deposited On:12 Sep 2007
Last Modified:11 Nov 2014 21:56

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