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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ftleibnizopen:oai:oai.leibnizopen.de:NN-Pm4YBdbrxVwz6QnB8 2023-05-15T18:30:50+02:00 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://doi.org/10.34657/1193 https://oa.tib.eu/renate/handle/123456789/630 eng eng München : European Geopyhsical Union CC BY-NC-SA 2.5 Unported https://creativecommons.org/licenses/by-nc-sa/2.5/ CC-BY-NC-SA Climate of the Past, Volume 12, Issue 1, Page 1-7 550 article Text 2005 ftleibnizopen https://doi.org/10.34657/1193 2023-03-01T07:24:24Z 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. publishedVersion Article in Journal/Newspaper taiga Tundra LeibnizOpen (The Leibniz Association) |
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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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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. publishedVersion |
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://doi.org/10.34657/1193 https://oa.tib.eu/renate/handle/123456789/630 |
genre |
taiga Tundra |
genre_facet |
taiga Tundra |
op_source |
Climate of the Past, Volume 12, Issue 1, Page 1-7 |
op_rights |
CC BY-NC-SA 2.5 Unported https://creativecommons.org/licenses/by-nc-sa/2.5/ |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.34657/1193 |
_version_ |
1766214436112039936 |