The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model
The relatively warm early Holocene climate in the Nordic Seas, known as the Holocene thermal maximum (HTM), is often associated with an orbitally forced summer insolation maximum at 10 ka BP. The spatial and temporal response recorded in proxy data in the North Atlantic and the Nordic Seas reveals a...
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Online Access: | https://doi.org/10.5194/cp-9-1629-2013 https://cp.copernicus.org/articles/9/1629/2013/ |
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ftcopernicus:oai:publications.copernicus.org:cp17393 2023-05-15T16:27:11+02:00 The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model Blaschek, M. Renssen, H. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/cp-9-1629-2013 https://cp.copernicus.org/articles/9/1629/2013/ eng eng info:eu-repo/grantAgreement/EC/FP7/238111 doi:10.5194/cp-9-1629-2013 https://cp.copernicus.org/articles/9/1629/2013/ info:eu-repo/semantics/openAccess eISSN: 1814-9332 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/cp-9-1629-2013 2020-07-20T16:25:24Z The relatively warm early Holocene climate in the Nordic Seas, known as the Holocene thermal maximum (HTM), is often associated with an orbitally forced summer insolation maximum at 10 ka BP. The spatial and temporal response recorded in proxy data in the North Atlantic and the Nordic Seas reveals a complex interaction of mechanisms active in the HTM. Previous studies have investigated the impact of the Laurentide Ice Sheet (LIS), as a remnant from the previous glacial period, altering climate conditions with a continuous supply of melt water to the Labrador Sea and adjacent seas and with a downwind cooling effect from the remnant LIS. In our present work we extend this approach by investigating the impact of the Greenland Ice Sheet (GIS) on the early Holocene climate and the HTM. Reconstructions suggest melt rates of 13 mSv for 9 ka BP, which result in our model in an ocean surface cooling of up to 2 K near Greenland. Reconstructed summer SST gradients agree best with our simulation including GIS melt, confirming that the impact of the early Holocene GIS is crucial for understanding the HTM characteristics in the Nordic Seas area. This implies that modern and near-future GIS melt can be expected to play an active role in the climate system in the centuries to come. Other/Unknown Material Greenland Ice Sheet Labrador Sea Nordic Seas North Atlantic Sea ice Copernicus Publications: E-Journals Greenland Climate of the Past 9 4 1629 1643 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The relatively warm early Holocene climate in the Nordic Seas, known as the Holocene thermal maximum (HTM), is often associated with an orbitally forced summer insolation maximum at 10 ka BP. The spatial and temporal response recorded in proxy data in the North Atlantic and the Nordic Seas reveals a complex interaction of mechanisms active in the HTM. Previous studies have investigated the impact of the Laurentide Ice Sheet (LIS), as a remnant from the previous glacial period, altering climate conditions with a continuous supply of melt water to the Labrador Sea and adjacent seas and with a downwind cooling effect from the remnant LIS. In our present work we extend this approach by investigating the impact of the Greenland Ice Sheet (GIS) on the early Holocene climate and the HTM. Reconstructions suggest melt rates of 13 mSv for 9 ka BP, which result in our model in an ocean surface cooling of up to 2 K near Greenland. Reconstructed summer SST gradients agree best with our simulation including GIS melt, confirming that the impact of the early Holocene GIS is crucial for understanding the HTM characteristics in the Nordic Seas area. This implies that modern and near-future GIS melt can be expected to play an active role in the climate system in the centuries to come. |
format |
Other/Unknown Material |
author |
Blaschek, M. Renssen, H. |
spellingShingle |
Blaschek, M. Renssen, H. The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model |
author_facet |
Blaschek, M. Renssen, H. |
author_sort |
Blaschek, M. |
title |
The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model |
title_short |
The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model |
title_full |
The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model |
title_fullStr |
The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model |
title_full_unstemmed |
The Holocene thermal maximum in the Nordic Seas: the impact of Greenland Ice Sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model |
title_sort |
holocene thermal maximum in the nordic seas: the impact of greenland ice sheet melt and other forcings in a coupled atmosphere–sea-ice–ocean model |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-9-1629-2013 https://cp.copernicus.org/articles/9/1629/2013/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Labrador Sea Nordic Seas North Atlantic Sea ice |
genre_facet |
Greenland Ice Sheet Labrador Sea Nordic Seas North Atlantic Sea ice |
op_source |
eISSN: 1814-9332 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/238111 doi:10.5194/cp-9-1629-2013 https://cp.copernicus.org/articles/9/1629/2013/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-9-1629-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
4 |
container_start_page |
1629 |
op_container_end_page |
1643 |
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1766016266258087936 |