Impact of meltwater on high-latitude early Last Interglacial climate
Recent data compilations of the early Last Interglacial period have indicated a bipolar temperature response at 130 ka, with colder-than-present temperatures in the North Atlantic and warmer-than-present temperatures in the Southern Ocean and over Antarctica. However, climate model simulations of th...
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ftcopernicus:oai:publications.copernicus.org:cp49515 2023-05-15T13:54:27+02:00 Impact of meltwater on high-latitude early Last Interglacial climate Stone, Emma J. Capron, Emilie Lunt, Daniel J. Payne, Antony J. Singarayer, Joy S. Valdes, Paul J. Wolff, Eric W. 2018-09-27 application/pdf https://doi.org/10.5194/cp-12-1919-2016 https://cp.copernicus.org/articles/12/1919/2016/ eng eng doi:10.5194/cp-12-1919-2016 https://cp.copernicus.org/articles/12/1919/2016/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-12-1919-2016 2020-07-20T16:23:58Z Recent data compilations of the early Last Interglacial period have indicated a bipolar temperature response at 130 ka, with colder-than-present temperatures in the North Atlantic and warmer-than-present temperatures in the Southern Ocean and over Antarctica. However, climate model simulations of this period have been unable to reproduce this response, when only orbital and greenhouse gas forcings are considered in a climate model framework. Using a full-complexity general circulation model we perform climate model simulations representative of 130 ka conditions which include a magnitude of freshwater forcing derived from data at this time. We show that this meltwater from the remnant Northern Hemisphere ice sheets during the glacial–interglacial transition produces a modelled climate response similar to the observed colder-than-present temperatures in the North Atlantic at 130 ka and also results in warmer-than-present temperatures in the Southern Ocean via the bipolar seesaw mechanism. Further simulations in which the West Antarctic Ice Sheet is also removed lead to warming in East Antarctica and the Southern Ocean but do not appreciably improve the model–data comparison. This integrated model–data approach provides evidence that Northern Hemisphere freshwater forcing is an important player in the evolution of early Last Interglacial climate. Text Antarc* Antarctic Antarctica East Antarctica Ice Sheet North Atlantic Southern Ocean Copernicus Publications: E-Journals Antarctic East Antarctica Southern Ocean West Antarctic Ice Sheet Climate of the Past 12 9 1919 1932 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
Recent data compilations of the early Last Interglacial period have indicated a bipolar temperature response at 130 ka, with colder-than-present temperatures in the North Atlantic and warmer-than-present temperatures in the Southern Ocean and over Antarctica. However, climate model simulations of this period have been unable to reproduce this response, when only orbital and greenhouse gas forcings are considered in a climate model framework. Using a full-complexity general circulation model we perform climate model simulations representative of 130 ka conditions which include a magnitude of freshwater forcing derived from data at this time. We show that this meltwater from the remnant Northern Hemisphere ice sheets during the glacial–interglacial transition produces a modelled climate response similar to the observed colder-than-present temperatures in the North Atlantic at 130 ka and also results in warmer-than-present temperatures in the Southern Ocean via the bipolar seesaw mechanism. Further simulations in which the West Antarctic Ice Sheet is also removed lead to warming in East Antarctica and the Southern Ocean but do not appreciably improve the model–data comparison. This integrated model–data approach provides evidence that Northern Hemisphere freshwater forcing is an important player in the evolution of early Last Interglacial climate. |
format |
Text |
author |
Stone, Emma J. Capron, Emilie Lunt, Daniel J. Payne, Antony J. Singarayer, Joy S. Valdes, Paul J. Wolff, Eric W. |
spellingShingle |
Stone, Emma J. Capron, Emilie Lunt, Daniel J. Payne, Antony J. Singarayer, Joy S. Valdes, Paul J. Wolff, Eric W. Impact of meltwater on high-latitude early Last Interglacial climate |
author_facet |
Stone, Emma J. Capron, Emilie Lunt, Daniel J. Payne, Antony J. Singarayer, Joy S. Valdes, Paul J. Wolff, Eric W. |
author_sort |
Stone, Emma J. |
title |
Impact of meltwater on high-latitude early Last Interglacial climate |
title_short |
Impact of meltwater on high-latitude early Last Interglacial climate |
title_full |
Impact of meltwater on high-latitude early Last Interglacial climate |
title_fullStr |
Impact of meltwater on high-latitude early Last Interglacial climate |
title_full_unstemmed |
Impact of meltwater on high-latitude early Last Interglacial climate |
title_sort |
impact of meltwater on high-latitude early last interglacial climate |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-12-1919-2016 https://cp.copernicus.org/articles/12/1919/2016/ |
geographic |
Antarctic East Antarctica Southern Ocean West Antarctic Ice Sheet |
geographic_facet |
Antarctic East Antarctica Southern Ocean West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet North Atlantic Southern Ocean |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-12-1919-2016 https://cp.copernicus.org/articles/12/1919/2016/ |
op_doi |
https://doi.org/10.5194/cp-12-1919-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
9 |
container_start_page |
1919 |
op_container_end_page |
1932 |
_version_ |
1766260334431043584 |