DOI 10.1007/s00382-002-0272-6
Abstract General circulation models (GCMs) of the climate system are powerful tools for understanding and predicting climate and climate change. The last glacial maximum (LGM) provides an extreme test of the model’s ability to simulate a change of climate, and allows us to increase our understanding...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.143.8970 2023-05-15T17:33:13+02:00 DOI 10.1007/s00382-002-0272-6 C. D. Hewitt Æ R. J. Stouffer Æ A. J. Broccoli J. F. B. Mitchell Æ Paul J. Valdes Æ J. F. B. Mitchell The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.8970 http://www.gfdl.noaa.gov/reference/bibliography/2003/hewitt0301.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.8970 http://www.gfdl.noaa.gov/reference/bibliography/2003/hewitt0301.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfdl.noaa.gov/reference/bibliography/2003/hewitt0301.pdf text ftciteseerx 2016-01-07T15:03:42Z Abstract General circulation models (GCMs) of the climate system are powerful tools for understanding and predicting climate and climate change. The last glacial maximum (LGM) provides an extreme test of the model’s ability to simulate a change of climate, and allows us to increase our understanding of mechanisms of climate change. We have used a coupled high resolution ocean–atmosphere GCM (HadCM3) to simulate the equilibrium climate at the LGM. The effect of ocean dynamics is investigated by carrying out a parallel experiment replacing the dynamic three-dimensional ocean GCM with a static thermodynamic mixed-layer ocean model. Changes to the ocean circulation, and feedbacks between the ocean, atmosphere and sea ice have an important influence on the surface response, and are discussed. The coupled model produces an intensified thermohaline circulation and an increase in the amount of heat transported northward by the Atlantic Ocean equatorward of 55°N, which is at odds with the interpretation of some proxy records. Such changes, which the thermodynamic mixed-layer ocean model cannot produce, have a large impact around the North Atlantic region, and are discussed in the study. 1 Text North Atlantic Sea ice Unknown |
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Abstract General circulation models (GCMs) of the climate system are powerful tools for understanding and predicting climate and climate change. The last glacial maximum (LGM) provides an extreme test of the model’s ability to simulate a change of climate, and allows us to increase our understanding of mechanisms of climate change. We have used a coupled high resolution ocean–atmosphere GCM (HadCM3) to simulate the equilibrium climate at the LGM. The effect of ocean dynamics is investigated by carrying out a parallel experiment replacing the dynamic three-dimensional ocean GCM with a static thermodynamic mixed-layer ocean model. Changes to the ocean circulation, and feedbacks between the ocean, atmosphere and sea ice have an important influence on the surface response, and are discussed. The coupled model produces an intensified thermohaline circulation and an increase in the amount of heat transported northward by the Atlantic Ocean equatorward of 55°N, which is at odds with the interpretation of some proxy records. Such changes, which the thermodynamic mixed-layer ocean model cannot produce, have a large impact around the North Atlantic region, and are discussed in the study. 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
C. D. Hewitt Æ R. J. Stouffer Æ A. J. Broccoli J. F. B. Mitchell Æ Paul J. Valdes Æ J. F. B. Mitchell |
spellingShingle |
C. D. Hewitt Æ R. J. Stouffer Æ A. J. Broccoli J. F. B. Mitchell Æ Paul J. Valdes Æ J. F. B. Mitchell DOI 10.1007/s00382-002-0272-6 |
author_facet |
C. D. Hewitt Æ R. J. Stouffer Æ A. J. Broccoli J. F. B. Mitchell Æ Paul J. Valdes Æ J. F. B. Mitchell |
author_sort |
C. D. Hewitt |
title |
DOI 10.1007/s00382-002-0272-6 |
title_short |
DOI 10.1007/s00382-002-0272-6 |
title_full |
DOI 10.1007/s00382-002-0272-6 |
title_fullStr |
DOI 10.1007/s00382-002-0272-6 |
title_full_unstemmed |
DOI 10.1007/s00382-002-0272-6 |
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doi 10.1007/s00382-002-0272-6 |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.8970 http://www.gfdl.noaa.gov/reference/bibliography/2003/hewitt0301.pdf |
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North Atlantic Sea ice |
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North Atlantic Sea ice |
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http://www.gfdl.noaa.gov/reference/bibliography/2003/hewitt0301.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.8970 http://www.gfdl.noaa.gov/reference/bibliography/2003/hewitt0301.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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