Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum
International audience The importance of the biogeophysical atmosphere-vegetation feedback in comparison with the radiative effect of lower atmospheric CO 2 concentrations and the presence of ice sheets at the last glacial maximum (LGM) is investigated with the climate system model CLIMBER-2. Equili...
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ftccsdartic:oai:HAL:hal-00298037v1 2023-11-12T04:27:10+01:00 Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum Jahn, A. Claussen, M. Ganopolski, A. Brovkin, V. Potsdam Institute for Climate Impact Research (PIK) Institute of Physics University of Potsdam = Universität Potsdam 2005-10-04 https://hal.science/hal-00298037 https://hal.science/hal-00298037/document https://hal.science/hal-00298037/file/cp-1-1-2005.pdf en eng HAL CCSD European Geosciences Union (EGU) hal-00298037 https://hal.science/hal-00298037 https://hal.science/hal-00298037/document https://hal.science/hal-00298037/file/cp-1-1-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00298037 Climate of the Past, 2005, 1 (1), pp.1-7 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2005 ftccsdartic 2023-10-21T23:15:29Z International audience The importance of the biogeophysical atmosphere-vegetation feedback in comparison with the radiative effect of lower atmospheric CO 2 concentrations and the presence of ice sheets at the last glacial maximum (LGM) is investigated with the climate system model CLIMBER-2. Equilibrium experiments reveal that most of the global cooling at the LGM (-5.1°C) relative to (natural) present-day conditions is caused by the introduction of ice sheets into the model (-3.0°C), followed by the effect of lower atmospheric CO 2 levels at the LGM (-1.5°C), while a synergy between these two factors appears to be very small on global average. The biogeophysical effects of changes in vegetation cover are found to cool the global LGM climate by 0.6°C. The latter are most pronounced in the northern high latitudes, where the taiga-tundra feedback causes annually averaged temperature changes of up to -2.0°C, while the radiative effect of lower atmospheric CO 2 in this region only produces a cooling of 1.5°C. Hence, in this region, the temperature changes caused by vegetation dynamics at the LGM exceed the cooling due to lower atmospheric CO 2 concentrations. Article in Journal/Newspaper taiga Tundra Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Jahn, A. Claussen, M. Ganopolski, A. Brovkin, V. Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The importance of the biogeophysical atmosphere-vegetation feedback in comparison with the radiative effect of lower atmospheric CO 2 concentrations and the presence of ice sheets at the last glacial maximum (LGM) is investigated with the climate system model CLIMBER-2. Equilibrium experiments reveal that most of the global cooling at the LGM (-5.1°C) relative to (natural) present-day conditions is caused by the introduction of ice sheets into the model (-3.0°C), followed by the effect of lower atmospheric CO 2 levels at the LGM (-1.5°C), while a synergy between these two factors appears to be very small on global average. The biogeophysical effects of changes in vegetation cover are found to cool the global LGM climate by 0.6°C. The latter are most pronounced in the northern high latitudes, where the taiga-tundra feedback causes annually averaged temperature changes of up to -2.0°C, while the radiative effect of lower atmospheric CO 2 in this region only produces a cooling of 1.5°C. Hence, in this region, the temperature changes caused by vegetation dynamics at the LGM exceed the cooling due to lower atmospheric CO 2 concentrations. |
author2 |
Potsdam Institute for Climate Impact Research (PIK) Institute of Physics University of Potsdam = Universität Potsdam |
format |
Article in Journal/Newspaper |
author |
Jahn, A. Claussen, M. Ganopolski, A. Brovkin, V. |
author_facet |
Jahn, A. Claussen, M. Ganopolski, A. Brovkin, V. |
author_sort |
Jahn, A. |
title |
Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum |
title_short |
Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum |
title_full |
Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum |
title_fullStr |
Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum |
title_full_unstemmed |
Quantifying the effect of vegetation dynamics on the climate of the Last Glacial Maximum |
title_sort |
quantifying the effect of vegetation dynamics on the climate of the last glacial maximum |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00298037 https://hal.science/hal-00298037/document https://hal.science/hal-00298037/file/cp-1-1-2005.pdf |
genre |
taiga Tundra |
genre_facet |
taiga Tundra |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00298037 Climate of the Past, 2005, 1 (1), pp.1-7 |
op_relation |
hal-00298037 https://hal.science/hal-00298037 https://hal.science/hal-00298037/document https://hal.science/hal-00298037/file/cp-1-1-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340869472387072 |