Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations
Simulations of the climates of the Last Glacial Maximum (LGM), 21 000 years ago, and of the Mid-Holocene (MH), 6000 years ago, allow an analysis of climate feedbacks in climate states that are radically different from today. The analyses of cloud and surface albedo feedbacks show that the shortwave...
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crroyalsociety:10.1098/rsta.2014.0424 2024-06-02T08:14:19+00:00 Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations Braconnot, Pascale Kageyama, Masa 2015 http://dx.doi.org/10.1098/rsta.2014.0424 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2014.0424 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2014.0424 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 373, issue 2054, page 20140424 ISSN 1364-503X 1471-2962 journal-article 2015 crroyalsociety https://doi.org/10.1098/rsta.2014.0424 2024-05-07T14:16:46Z Simulations of the climates of the Last Glacial Maximum (LGM), 21 000 years ago, and of the Mid-Holocene (MH), 6000 years ago, allow an analysis of climate feedbacks in climate states that are radically different from today. The analyses of cloud and surface albedo feedbacks show that the shortwave cloud feedback is a major driver of differences between model results. Similar behaviours appear when comparing the LGM and MH simulated changes, highlighting the fingerprint of model physics. Even though the different feedbacks show similarities between the different climate periods, the fact that their relative strength differs from one climate to the other prevents a direct comparison of past and future climate sensitivity. The land-surface feedback also shows large disparities among models even though they all produce positive sea-ice and snow feedbacks. Models have very different sensitivities when considering the vegetation feedback. This feedback has a regional pattern that differs significantly between models and depends on their level of complexity and model biases. Analyses of the MH climate in two versions of the IPSL model provide further indication on the possibilities to assess the role of model biases and model physics on simulated climate changes using past climates for which observations can be used to assess the model results. Article in Journal/Newspaper Sea ice The Royal Society Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373 2054 20140424 |
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crroyalsociety |
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English |
description |
Simulations of the climates of the Last Glacial Maximum (LGM), 21 000 years ago, and of the Mid-Holocene (MH), 6000 years ago, allow an analysis of climate feedbacks in climate states that are radically different from today. The analyses of cloud and surface albedo feedbacks show that the shortwave cloud feedback is a major driver of differences between model results. Similar behaviours appear when comparing the LGM and MH simulated changes, highlighting the fingerprint of model physics. Even though the different feedbacks show similarities between the different climate periods, the fact that their relative strength differs from one climate to the other prevents a direct comparison of past and future climate sensitivity. The land-surface feedback also shows large disparities among models even though they all produce positive sea-ice and snow feedbacks. Models have very different sensitivities when considering the vegetation feedback. This feedback has a regional pattern that differs significantly between models and depends on their level of complexity and model biases. Analyses of the MH climate in two versions of the IPSL model provide further indication on the possibilities to assess the role of model biases and model physics on simulated climate changes using past climates for which observations can be used to assess the model results. |
format |
Article in Journal/Newspaper |
author |
Braconnot, Pascale Kageyama, Masa |
spellingShingle |
Braconnot, Pascale Kageyama, Masa Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations |
author_facet |
Braconnot, Pascale Kageyama, Masa |
author_sort |
Braconnot, Pascale |
title |
Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations |
title_short |
Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations |
title_full |
Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations |
title_fullStr |
Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations |
title_full_unstemmed |
Shortwave forcing and feedbacks in Last Glacial Maximum and Mid-Holocene PMIP3 simulations |
title_sort |
shortwave forcing and feedbacks in last glacial maximum and mid-holocene pmip3 simulations |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://dx.doi.org/10.1098/rsta.2014.0424 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2014.0424 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2014.0424 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 373, issue 2054, page 20140424 ISSN 1364-503X 1471-2962 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.2014.0424 |
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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373 |
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2054 |
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20140424 |
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1800738126971273216 |