An energy budget approach to understand the Arctic warming during the Last Interglacial
The Last Interglacial period (129–116 ka) is characterised by a strong orbital forcing which leads to a different seasonal and latitudinal distribution of insolation compared to the pre-industrial period. In particular, these changes amplify the seasonality of the insolation in the high latitudes of...
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Copernicus Publications
2022
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fttriple:oai:gotriple.eu:oai:doaj.org/article:3f19cccd4c6845508b839d9aa72a5872 2023-05-15T14:41:21+02:00 An energy budget approach to understand the Arctic warming during the Last Interglacial M. Sicard M. Kageyama S. Charbit P. Braconnot J.-B. Madeleine 2022-03-01 https://doi.org/10.5194/cp-18-607-2022 https://cp.copernicus.org/articles/18/607/2022/cp-18-607-2022.pdf https://doaj.org/article/3f19cccd4c6845508b839d9aa72a5872 en eng Copernicus Publications doi:10.5194/cp-18-607-2022 1814-9324 1814-9332 https://cp.copernicus.org/articles/18/607/2022/cp-18-607-2022.pdf https://doaj.org/article/3f19cccd4c6845508b839d9aa72a5872 undefined Climate of the Past, Vol 18, Pp 607-629 (2022) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.5194/cp-18-607-2022 2023-01-22T19:11:27Z The Last Interglacial period (129–116 ka) is characterised by a strong orbital forcing which leads to a different seasonal and latitudinal distribution of insolation compared to the pre-industrial period. In particular, these changes amplify the seasonality of the insolation in the high latitudes of the Northern Hemisphere. Here, we investigate the Arctic climate response to this forcing by comparing the CMIP6 lig127k and piControl simulations performed with the IPSL-CM6A-LR (the global climate model developed at Institut Pierre-Simon Laplace) model. Using an energy budget framework, we analyse the interactions between the atmosphere, ocean, sea ice and continents. In summer, the insolation anomaly reaches its maximum and causes a rise in near-surface air temperature of 3.1 ∘C over the Arctic region. This warming is primarily due to a strong positive anomaly of surface downwelling shortwave radiation over continental surfaces, followed by large heat transfer from the continents to the atmosphere. The surface layers of the Arctic Ocean also receive more energy but in smaller quantity than the continents due to a cloud negative feedback. Furthermore, while heat exchange from the continental surfaces towards the atmosphere is strengthened, the ocean absorbs and stores the heat excess due to a decline in sea ice cover. However, the maximum near-surface air temperature anomaly does not peak in summer like insolation but occurs in autumn with a temperature increase of 4.2 ∘C relative to the pre-industrial period. This strong warming is driven by a positive anomaly of longwave radiation over the Arctic Ocean enhanced by a positive cloud feedback. It is also favoured by the summer and autumn Arctic sea ice retreat (-1.9×106 and -3.4×106 km2, respectively), which exposes the warm oceanic surface and thus allows oceanic heat storage and release of water vapour in summer. This study highlights the crucial role of sea ice cover variations, Arctic Ocean, as well as changes in polar cloud optical properties on the Last ... Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Unknown Arctic Arctic Ocean Laplace ENVELOPE(141.467,141.467,-66.782,-66.782) Climate of the Past 18 3 607 629 |
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English |
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geo envir |
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geo envir M. Sicard M. Kageyama S. Charbit P. Braconnot J.-B. Madeleine An energy budget approach to understand the Arctic warming during the Last Interglacial |
topic_facet |
geo envir |
description |
The Last Interglacial period (129–116 ka) is characterised by a strong orbital forcing which leads to a different seasonal and latitudinal distribution of insolation compared to the pre-industrial period. In particular, these changes amplify the seasonality of the insolation in the high latitudes of the Northern Hemisphere. Here, we investigate the Arctic climate response to this forcing by comparing the CMIP6 lig127k and piControl simulations performed with the IPSL-CM6A-LR (the global climate model developed at Institut Pierre-Simon Laplace) model. Using an energy budget framework, we analyse the interactions between the atmosphere, ocean, sea ice and continents. In summer, the insolation anomaly reaches its maximum and causes a rise in near-surface air temperature of 3.1 ∘C over the Arctic region. This warming is primarily due to a strong positive anomaly of surface downwelling shortwave radiation over continental surfaces, followed by large heat transfer from the continents to the atmosphere. The surface layers of the Arctic Ocean also receive more energy but in smaller quantity than the continents due to a cloud negative feedback. Furthermore, while heat exchange from the continental surfaces towards the atmosphere is strengthened, the ocean absorbs and stores the heat excess due to a decline in sea ice cover. However, the maximum near-surface air temperature anomaly does not peak in summer like insolation but occurs in autumn with a temperature increase of 4.2 ∘C relative to the pre-industrial period. This strong warming is driven by a positive anomaly of longwave radiation over the Arctic Ocean enhanced by a positive cloud feedback. It is also favoured by the summer and autumn Arctic sea ice retreat (-1.9×106 and -3.4×106 km2, respectively), which exposes the warm oceanic surface and thus allows oceanic heat storage and release of water vapour in summer. This study highlights the crucial role of sea ice cover variations, Arctic Ocean, as well as changes in polar cloud optical properties on the Last ... |
format |
Article in Journal/Newspaper |
author |
M. Sicard M. Kageyama S. Charbit P. Braconnot J.-B. Madeleine |
author_facet |
M. Sicard M. Kageyama S. Charbit P. Braconnot J.-B. Madeleine |
author_sort |
M. Sicard |
title |
An energy budget approach to understand the Arctic warming during the Last Interglacial |
title_short |
An energy budget approach to understand the Arctic warming during the Last Interglacial |
title_full |
An energy budget approach to understand the Arctic warming during the Last Interglacial |
title_fullStr |
An energy budget approach to understand the Arctic warming during the Last Interglacial |
title_full_unstemmed |
An energy budget approach to understand the Arctic warming during the Last Interglacial |
title_sort |
energy budget approach to understand the arctic warming during the last interglacial |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-607-2022 https://cp.copernicus.org/articles/18/607/2022/cp-18-607-2022.pdf https://doaj.org/article/3f19cccd4c6845508b839d9aa72a5872 |
long_lat |
ENVELOPE(141.467,141.467,-66.782,-66.782) |
geographic |
Arctic Arctic Ocean Laplace |
geographic_facet |
Arctic Arctic Ocean Laplace |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
Climate of the Past, Vol 18, Pp 607-629 (2022) |
op_relation |
doi:10.5194/cp-18-607-2022 1814-9324 1814-9332 https://cp.copernicus.org/articles/18/607/2022/cp-18-607-2022.pdf https://doaj.org/article/3f19cccd4c6845508b839d9aa72a5872 |
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undefined |
op_doi |
https://doi.org/10.5194/cp-18-607-2022 |
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Climate of the Past |
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18 |
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3 |
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607 |
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629 |
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