Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet
With the boundary conditions appropriate for the Last Glacial Maximum (LGM), including ice sheets, sea surface temperatures, sea-ice distribution, atmospheric CO2 concentration, the Earth’s orbital parameters, topography, and coastline, the atmospheric general circulation model of the Institute of A...
Published in: | Journal of Geophysical Research: Atmospheres |
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American Geophysical Union
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Online Access: | https://hdl.handle.net/1956/401 https://doi.org/10.1029/2002jd002167 |
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ftunivbergen:oai:bora.uib.no:1956/401 2023-05-15T16:41:00+02:00 Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet Jiang, Dabang Wang, Huijun Drange, Helge Lang, Xianmei 2003-02-06 49349 bytes 2505860 bytes 166 bytes text/plain application/pdf https://hdl.handle.net/1956/401 https://doi.org/10.1029/2002jd002167 eng eng American Geophysical Union urn:issn:0148-0227 https://hdl.handle.net/1956/401 https://doi.org/10.1029/2002jd002167 Copyright 2003 the American Geophysical Union Journal article Peer reviewed 2003 ftunivbergen https://doi.org/10.1029/2002jd002167 2023-03-14T17:43:07Z With the boundary conditions appropriate for the Last Glacial Maximum (LGM), including ice sheets, sea surface temperatures, sea-ice distribution, atmospheric CO2 concentration, the Earth’s orbital parameters, topography, and coastline, the atmospheric general circulation model of the Institute of Atmospheric Physics (IAP-AGCM) computes colder and drier conditions than for present day. Global annual-average surface temperature decreased by 5.3°C, and terrestrial precipitation was down by 29%. It is shown that IAP-AGCM LGM simulation compares favorably to results from other AGCMs, and/but generally shows a weak terrestrial cooling when compared to paleoclimatic reconstructions in tropics. The 21 ka (ka: thousands of years ago) vegetation reconstruction is introduced into the model to study the regional climate response to the changes in vegetation and associated soil characteristics over China. The additional cooling due to these two changes reduces, to a certain degree, the model-data discrepancies. In addition, under the precondition of continental ice existing over part of the Tibetan Plateau at the LGM, the authors examine the regional climate response to the continental ice. It follows that the glacial-age environment over the Tibetan Plateau is a very important factor for 21 ka climate simulation in East Asia. Article in Journal/Newspaper Ice Sheet Sea ice University of Bergen: Bergen Open Research Archive (BORA-UiB) Journal of Geophysical Research: Atmospheres 108 D3 n/a n/a |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
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English |
description |
With the boundary conditions appropriate for the Last Glacial Maximum (LGM), including ice sheets, sea surface temperatures, sea-ice distribution, atmospheric CO2 concentration, the Earth’s orbital parameters, topography, and coastline, the atmospheric general circulation model of the Institute of Atmospheric Physics (IAP-AGCM) computes colder and drier conditions than for present day. Global annual-average surface temperature decreased by 5.3°C, and terrestrial precipitation was down by 29%. It is shown that IAP-AGCM LGM simulation compares favorably to results from other AGCMs, and/but generally shows a weak terrestrial cooling when compared to paleoclimatic reconstructions in tropics. The 21 ka (ka: thousands of years ago) vegetation reconstruction is introduced into the model to study the regional climate response to the changes in vegetation and associated soil characteristics over China. The additional cooling due to these two changes reduces, to a certain degree, the model-data discrepancies. In addition, under the precondition of continental ice existing over part of the Tibetan Plateau at the LGM, the authors examine the regional climate response to the continental ice. It follows that the glacial-age environment over the Tibetan Plateau is a very important factor for 21 ka climate simulation in East Asia. |
format |
Article in Journal/Newspaper |
author |
Jiang, Dabang Wang, Huijun Drange, Helge Lang, Xianmei |
spellingShingle |
Jiang, Dabang Wang, Huijun Drange, Helge Lang, Xianmei Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet |
author_facet |
Jiang, Dabang Wang, Huijun Drange, Helge Lang, Xianmei |
author_sort |
Jiang, Dabang |
title |
Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet |
title_short |
Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet |
title_full |
Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet |
title_fullStr |
Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet |
title_full_unstemmed |
Last Glacial Maximum over China: Sensitivities of climate to paleovegetation and Tibetan ice sheet |
title_sort |
last glacial maximum over china: sensitivities of climate to paleovegetation and tibetan ice sheet |
publisher |
American Geophysical Union |
publishDate |
2003 |
url |
https://hdl.handle.net/1956/401 https://doi.org/10.1029/2002jd002167 |
genre |
Ice Sheet Sea ice |
genre_facet |
Ice Sheet Sea ice |
op_relation |
urn:issn:0148-0227 https://hdl.handle.net/1956/401 https://doi.org/10.1029/2002jd002167 |
op_rights |
Copyright 2003 the American Geophysical Union |
op_doi |
https://doi.org/10.1029/2002jd002167 |
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Journal of Geophysical Research: Atmospheres |
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108 |
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D3 |
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1766031441763762176 |