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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Online Access: | https://doi.org/10.5194/cp-15-701-2019 https://cp.copernicus.org/articles/15/701/2019/ |
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fttriple:oai:gotriple.eu:W2UYmG0fDJ_dpjSgn8M1E 2023-05-15T16:49:23+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 2019-04-08 https://doi.org/10.5194/cp-15-701-2019 https://cp.copernicus.org/articles/15/701/2019/ en eng Copernicus Publications doi:10.5194/cp-15-701-2019 10670/1.hgann7 1814-9324 1814-9332 https://cp.copernicus.org/articles/15/701/2019/ undefined Geographica Helvetica - geography eISSN: 1814-9332 archeo geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/cp-15-701-2019 2023-01-22T17:52:35Z 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 Unknown Climate of the Past 15 2 701 711 |
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language |
English |
topic |
archeo geo |
spellingShingle |
archeo geo 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 |
topic_facet |
archeo geo |
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 |
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 Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-15-701-2019 https://cp.copernicus.org/articles/15/701/2019/ |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-15-701-2019 10670/1.hgann7 1814-9324 1814-9332 https://cp.copernicus.org/articles/15/701/2019/ |
op_rights |
undefined |
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 |
_version_ |
1766039533815595008 |