Quantifying the effect of vegetation dynamics on the climate of the last glacial maximum
The importance of the biogeophysical atmosphere-vegetation feedback in comparison with the radiative effect of lower atmospheric CO2 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...
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2005
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fttibhannoverren:oai:oa.tib.eu:123456789/630 2024-09-15T18:38:39+00:00 Quantifying the effect of vegetation dynamics on the climate of the last glacial maximum Jahn, A. Claussen, M. Ganopolski, A. Brovkin, V. 2005 application/pdf https://oa.tib.eu/renate/handle/123456789/630 https://doi.org/10.34657/1193 eng eng München : European Geopyhsical Union DOI:https://doi.org/10.5194/cp-1-1-2005 https://doi.org/10.34657/1193 https://oa.tib.eu/renate/handle/123456789/630 CC BY-NC-SA 2.5 Unported https://creativecommons.org/licenses/by-nc-sa/2.5/ frei zugänglich ddc:550 status-type:publishedVersion doc-type:Article doc-type:Text 2005 fttibhannoverren https://doi.org/10.34657/119310.5194/cp-1-1-2005 2024-06-26T23:32:42Z The importance of the biogeophysical atmosphere-vegetation feedback in comparison with the radiative effect of lower atmospheric CO2 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 CO2 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 CO2 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 CO2 concentrations. Article in Journal/Newspaper taiga Tundra Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) |
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Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) |
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English |
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ddc:550 Jahn, A. Claussen, M. Ganopolski, A. Brovkin, V. Quantifying the effect of vegetation dynamics on the climate of the last glacial maximum |
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ddc:550 |
description |
The importance of the biogeophysical atmosphere-vegetation feedback in comparison with the radiative effect of lower atmospheric CO2 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 CO2 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 CO2 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 CO2 concentrations. |
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 |
München : European Geopyhsical Union |
publishDate |
2005 |
url |
https://oa.tib.eu/renate/handle/123456789/630 https://doi.org/10.34657/1193 |
genre |
taiga Tundra |
genre_facet |
taiga Tundra |
op_relation |
DOI:https://doi.org/10.5194/cp-1-1-2005 https://doi.org/10.34657/1193 https://oa.tib.eu/renate/handle/123456789/630 |
op_rights |
CC BY-NC-SA 2.5 Unported https://creativecommons.org/licenses/by-nc-sa/2.5/ frei zugänglich |
op_doi |
https://doi.org/10.34657/119310.5194/cp-1-1-2005 |
_version_ |
1810483063598088192 |