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- Jonathan Gregory
- Walker Institute for Climate System Research, Department of Meteorology, University of Reading, Reading, and Hadley Centre, Met Office, Exeter, United Kingdom
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- Mark Webb
- Hadley Centre, Met Office, Exeter, United Kingdom
書誌事項
- 公開日
- 2008-01-01
- DOI
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- 10.1175/2007jcli1834.1
- 公開者
- American Meteorological Society
この論文をさがす
説明
<jats:title>Abstract</jats:title> <jats:p>The radiative forcing of CO2 and the climate feedback parameter are evaluated in several climate models with slab oceans by regressing the annual-mean global-mean top-of-atmosphere radiative flux against the annual-mean global-mean surface air temperature change ΔT following a doubling of atmospheric CO2 concentration. The method indicates that in many models there is a significant rapid tropospheric adjustment to CO2 leading to changes in cloud, and reducing the effective radiative forcing, in a way analogous to the indirect and semidirect effects of aerosol. By contrast, in most models the cloud feedback is small, defined as the part of the change that evolves with ΔT. Comparison with forcing evaluated by fixing sea surface conditions gives qualitatively similar results for the cloud components of forcing, both globally and locally. Tropospheric adjustment to CO2 may be responsible for some of the model spread in equilibrium climate sensitivity and could affect time-dependent climate projections.</jats:p>
収録刊行物
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- Journal of Climate
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Journal of Climate 21 (1), 58-71, 2008-01-01
American Meteorological Society
