The Community Climate System Model version 4
Author Posting. © American Meteorological Society, 2011. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 24 (2011): 4973–4991, doi:10.1175/2011JCLI4083.1. The fourth vers...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4884 2023-05-15T15:02:07+02:00 The Community Climate System Model version 4 Gent, Peter R. Danabasoglu, Gokhan Donner, Leo J. Holland, Marika M. Hunke, Elizabeth C. Jayne, Steven R. Lawrence, David M. Neale, Richard B. Rasch, Philip J. Vertenstein, Mariana Worley, Patrick H. Yang, Zong-Liang Zhang, Minghua 2011-10-01 application/pdf https://hdl.handle.net/1912/4884 en_US eng American Meteorological Society https://doi.org/10.1175/2011JCLI4083.1 Journal of Climate 24 (2011): 4973–4991 https://hdl.handle.net/1912/4884 doi:10.1175/2011JCLI4083.1 Journal of Climate 24 (2011): 4973–4991 doi:10.1175/2011JCLI4083.1 Climate models Madden–Julian oscillation Sea ice Model evaluation/performance Meridional overturning circulation Convection Tropics Article 2011 ftwhoas https://doi.org/10.1175/2011JCLI4083.1 2022-05-28T22:58:29Z Author Posting. © American Meteorological Society, 2011. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 24 (2011): 4973–4991, doi:10.1175/2011JCLI4083.1. The fourth version of the Community Climate System Model (CCSM4) was recently completed and released to the climate community. This paper describes developments to all CCSM components, and documents fully coupled preindustrial control runs compared to the previous version, CCSM3. Using the standard atmosphere and land resolution of 1° results in the sea surface temperature biases in the major upwelling regions being comparable to the 1.4°-resolution CCSM3. Two changes to the deep convection scheme in the atmosphere component result in CCSM4 producing El Niño–Southern Oscillation variability with a much more realistic frequency distribution than in CCSM3, although the amplitude is too large compared to observations. These changes also improve the Madden–Julian oscillation and the frequency distribution of tropical precipitation. A new overflow parameterization in the ocean component leads to an improved simulation of the Gulf Stream path and the North Atlantic Ocean meridional overturning circulation. Changes to the CCSM4 land component lead to a much improved annual cycle of water storage, especially in the tropics. The CCSM4 sea ice component uses much more realistic albedos than CCSM3, and for several reasons the Arctic sea ice concentration is improved in CCSM4. An ensemble of twentieth-century simulations produces a good match to the observed September Arctic sea ice extent from 1979 to 2005. The CCSM4 ensemble mean increase in globally averaged surface temperature between 1850 and 2005 is larger than the observed increase by about 0.4°C. This is consistent with the fact that CCSM4 does not include a representation of the indirect effects of aerosols, although other factors may come into play. The CCSM4 still has significant ... Article in Journal/Newspaper Arctic North Atlantic Sea ice Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Journal of Climate 24 19 4973 4991 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Climate models Madden–Julian oscillation Sea ice Model evaluation/performance Meridional overturning circulation Convection Tropics |
spellingShingle |
Climate models Madden–Julian oscillation Sea ice Model evaluation/performance Meridional overturning circulation Convection Tropics Gent, Peter R. Danabasoglu, Gokhan Donner, Leo J. Holland, Marika M. Hunke, Elizabeth C. Jayne, Steven R. Lawrence, David M. Neale, Richard B. Rasch, Philip J. Vertenstein, Mariana Worley, Patrick H. Yang, Zong-Liang Zhang, Minghua The Community Climate System Model version 4 |
topic_facet |
Climate models Madden–Julian oscillation Sea ice Model evaluation/performance Meridional overturning circulation Convection Tropics |
description |
Author Posting. © American Meteorological Society, 2011. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Climate 24 (2011): 4973–4991, doi:10.1175/2011JCLI4083.1. The fourth version of the Community Climate System Model (CCSM4) was recently completed and released to the climate community. This paper describes developments to all CCSM components, and documents fully coupled preindustrial control runs compared to the previous version, CCSM3. Using the standard atmosphere and land resolution of 1° results in the sea surface temperature biases in the major upwelling regions being comparable to the 1.4°-resolution CCSM3. Two changes to the deep convection scheme in the atmosphere component result in CCSM4 producing El Niño–Southern Oscillation variability with a much more realistic frequency distribution than in CCSM3, although the amplitude is too large compared to observations. These changes also improve the Madden–Julian oscillation and the frequency distribution of tropical precipitation. A new overflow parameterization in the ocean component leads to an improved simulation of the Gulf Stream path and the North Atlantic Ocean meridional overturning circulation. Changes to the CCSM4 land component lead to a much improved annual cycle of water storage, especially in the tropics. The CCSM4 sea ice component uses much more realistic albedos than CCSM3, and for several reasons the Arctic sea ice concentration is improved in CCSM4. An ensemble of twentieth-century simulations produces a good match to the observed September Arctic sea ice extent from 1979 to 2005. The CCSM4 ensemble mean increase in globally averaged surface temperature between 1850 and 2005 is larger than the observed increase by about 0.4°C. This is consistent with the fact that CCSM4 does not include a representation of the indirect effects of aerosols, although other factors may come into play. The CCSM4 still has significant ... |
format |
Article in Journal/Newspaper |
author |
Gent, Peter R. Danabasoglu, Gokhan Donner, Leo J. Holland, Marika M. Hunke, Elizabeth C. Jayne, Steven R. Lawrence, David M. Neale, Richard B. Rasch, Philip J. Vertenstein, Mariana Worley, Patrick H. Yang, Zong-Liang Zhang, Minghua |
author_facet |
Gent, Peter R. Danabasoglu, Gokhan Donner, Leo J. Holland, Marika M. Hunke, Elizabeth C. Jayne, Steven R. Lawrence, David M. Neale, Richard B. Rasch, Philip J. Vertenstein, Mariana Worley, Patrick H. Yang, Zong-Liang Zhang, Minghua |
author_sort |
Gent, Peter R. |
title |
The Community Climate System Model version 4 |
title_short |
The Community Climate System Model version 4 |
title_full |
The Community Climate System Model version 4 |
title_fullStr |
The Community Climate System Model version 4 |
title_full_unstemmed |
The Community Climate System Model version 4 |
title_sort |
community climate system model version 4 |
publisher |
American Meteorological Society |
publishDate |
2011 |
url |
https://hdl.handle.net/1912/4884 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic Sea ice |
genre_facet |
Arctic North Atlantic Sea ice |
op_source |
Journal of Climate 24 (2011): 4973–4991 doi:10.1175/2011JCLI4083.1 |
op_relation |
https://doi.org/10.1175/2011JCLI4083.1 Journal of Climate 24 (2011): 4973–4991 https://hdl.handle.net/1912/4884 doi:10.1175/2011JCLI4083.1 |
op_doi |
https://doi.org/10.1175/2011JCLI4083.1 |
container_title |
Journal of Climate |
container_volume |
24 |
container_issue |
19 |
container_start_page |
4973 |
op_container_end_page |
4991 |
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1766334103636934656 |