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Kiehl, Jeffrey T., Shields, Christine A., Hack, James J. and Collins, William D. 
ORCID: https://orcid.org/0000-0002-4463-9848
(2006)
The climate sensitivity of the Community Climate System Model version 3 (CCSM3).
Journal of Climate, 19 (11).
pp. 2584-2596.
ISSN 0894-8755
Abstract
The climate sensitivity of the Community Climate System Model (CCSM) is described in terms of the equilibrium change in surface temperature due to a doubling of carbon dioxide in a slab ocean version of the Community Atmosphere Model (CAM) and the transient climate response, which is the surface temperature change at the point of doubling of carbon dioxide in a 1% yr-1 CO2 simulation with the fully coupled CCSM. For a fixed atmospheric horizontal resolution across model versions, we show that the equilibrium sensitivity has monotonically increased across CSM1.4, CCSM2, to CCSM3 from 2.01° to 2.27° to 2.47°C, respectively. The transient climate response for these versions is 1.44° to 1.09° to 1.48°C, respectively. Using climate feedback analysis, it is shown that both clear-sky and cloudy-sky processes have contributed to the changes in transient climate response. The dependence of these sensitivities on horizontal resolution is also explored. The equilibrium sensitivity of the high-resolution (T85) version of CCSM3 is 2.71°C, while the equilibrium response for the low-resolution model (T31) is 2.32°C. It is shown that the shortwave cloud response of the high-resolution version of the CCSM3 is anomalous compared to the low-and moderate-resolution versions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | atmospheric science ,/dk/atira/pure/subjectarea/asjc/1900/1902 |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 07 Jul 2026 11:22 |
| Last Modified: | 08 Jul 2026 14:34 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/103718 |
| DOI: | 10.1175/JCLI3747.1 |
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