Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event
The 4.2 ka BP event, spanning from ca 4200 to 3900 cal BP, has been documented in numerous archaeological data and continental archives across the Northern Hemisphere as an abrupt shift to dry and cold climate. However, data on synchronous ocean circulation changes are notably lacking, thus preventi...
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Copernicus GmbH
2019
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ftarchimer:oai:archimer.ifremer.fr:60005 2023-05-15T16:49:28+02:00 Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event Jalali, Bassem Sicre, Marie-alexandrine Azuara, Julien Pellichero, Violaine Combourieu-nebout, Nathalie 2019-04 application/pdf https://archimer.ifremer.fr/doc/00488/60005/63242.pdf https://archimer.ifremer.fr/doc/00488/60005/63243.pdf https://archimer.ifremer.fr/doc/00488/60005/63244.pdf https://doi.org/10.5194/cp-15-701-2019 https://archimer.ifremer.fr/doc/00488/60005/ eng eng Copernicus GmbH https://archimer.ifremer.fr/doc/00488/60005/63242.pdf https://archimer.ifremer.fr/doc/00488/60005/63243.pdf https://archimer.ifremer.fr/doc/00488/60005/63244.pdf doi:10.5194/cp-15-701-2019 https://archimer.ifremer.fr/doc/00488/60005/ info:eu-repo/semantics/openAccess restricted use Climate Of The Past (1814-9324) (Copernicus GmbH), 2019-04 , Vol. 15 , N. 2 , P. 701-711 text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.5194/cp-15-701-2019 2021-09-23T20:32:23Z The 4.2 ka BP event, spanning from ca 4200 to 3900 cal BP, has been documented in numerous archaeological data and continental archives across the Northern Hemisphere as an abrupt shift to dry and cold climate. However, data on synchronous ocean circulation changes are notably lacking, thus preventing us from getting a full insight into the physical mechanisms responsible for this climate deterioration. Here, we present two high-resolution (5–20 years) sea surface temperature (SST) records from the subpolar gyre and off north Iceland in the vicinity of the polar front obtained from alkenone paleo-thermometry and compare them with proxy data from the western Mediterranean Sea to gain information on regional temperature and precipitation patterns. Our results are evidence of a temperature dipole pattern which, combined with other paleo-oceanographic records of the North Atlantic, suggests a weakening of the subpolar gyre possibly associated with atmospheric blocked regimes. Article in Journal/Newspaper Iceland North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Climate of the Past 15 2 701 711 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The 4.2 ka BP event, spanning from ca 4200 to 3900 cal BP, has been documented in numerous archaeological data and continental archives across the Northern Hemisphere as an abrupt shift to dry and cold climate. However, data on synchronous ocean circulation changes are notably lacking, thus preventing us from getting a full insight into the physical mechanisms responsible for this climate deterioration. Here, we present two high-resolution (5–20 years) sea surface temperature (SST) records from the subpolar gyre and off north Iceland in the vicinity of the polar front obtained from alkenone paleo-thermometry and compare them with proxy data from the western Mediterranean Sea to gain information on regional temperature and precipitation patterns. Our results are evidence of a temperature dipole pattern which, combined with other paleo-oceanographic records of the North Atlantic, suggests a weakening of the subpolar gyre possibly associated with atmospheric blocked regimes. |
format |
Article in Journal/Newspaper |
author |
Jalali, Bassem Sicre, Marie-alexandrine Azuara, Julien Pellichero, Violaine Combourieu-nebout, Nathalie |
spellingShingle |
Jalali, Bassem Sicre, Marie-alexandrine Azuara, Julien Pellichero, Violaine Combourieu-nebout, Nathalie Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event |
author_facet |
Jalali, Bassem Sicre, Marie-alexandrine Azuara, Julien Pellichero, Violaine Combourieu-nebout, Nathalie |
author_sort |
Jalali, Bassem |
title |
Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event |
title_short |
Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event |
title_full |
Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event |
title_fullStr |
Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event |
title_full_unstemmed |
Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event |
title_sort |
influence of the north atlantic subpolar gyre circulation on the 4.2 ka bp event |
publisher |
Copernicus GmbH |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00488/60005/63242.pdf https://archimer.ifremer.fr/doc/00488/60005/63243.pdf https://archimer.ifremer.fr/doc/00488/60005/63244.pdf https://doi.org/10.5194/cp-15-701-2019 https://archimer.ifremer.fr/doc/00488/60005/ |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Climate Of The Past (1814-9324) (Copernicus GmbH), 2019-04 , Vol. 15 , N. 2 , P. 701-711 |
op_relation |
https://archimer.ifremer.fr/doc/00488/60005/63242.pdf https://archimer.ifremer.fr/doc/00488/60005/63243.pdf https://archimer.ifremer.fr/doc/00488/60005/63244.pdf doi:10.5194/cp-15-701-2019 https://archimer.ifremer.fr/doc/00488/60005/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.5194/cp-15-701-2019 |
container_title |
Climate of the Past |
container_volume |
15 |
container_issue |
2 |
container_start_page |
701 |
op_container_end_page |
711 |
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1766039605277097984 |