Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events
Dansgaard–Oeschger oscillations constitute one of the most enigmatic features of the last glacial cycle. Their cold atmospheric phases have been commonly associated with cold sea-surface temperatures and expansion of sea ice in the North Atlantic and adjacent seas. Here, based on dinocyst analyses f...
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Online Access: | https://doi.org/10.5194/cp-13-729-2017 https://cp.copernicus.org/articles/13/729/2017/ |
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ftcopernicus:oai:publications.copernicus.org:cp57255 2023-05-15T16:26:31+02:00 Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events Wary, Mélanie Eynaud, Frédérique Swingedouw, Didier Masson-Delmotte, Valérie Matthiessen, Jens Kissel, Catherine Zumaque, Jena Rossignol, Linda Jouzel, Jean 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/cp-13-729-2017 https://cp.copernicus.org/articles/13/729/2017/ eng eng info:eu-repo/grantAgreement/EC/FP7/243908 doi:10.5194/cp-13-729-2017 https://cp.copernicus.org/articles/13/729/2017/ info:eu-repo/semantics/openAccess eISSN: 1814-9332 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/cp-13-729-2017 2020-07-20T16:23:41Z Dansgaard–Oeschger oscillations constitute one of the most enigmatic features of the last glacial cycle. Their cold atmospheric phases have been commonly associated with cold sea-surface temperatures and expansion of sea ice in the North Atlantic and adjacent seas. Here, based on dinocyst analyses from the 48–30 ka interval of four sediment cores from the northern Northeast Atlantic and southern Norwegian Sea, we provide direct and quantitative evidence of a regional paradoxical seesaw pattern: cold Greenland and North Atlantic phases coincide with warmer sea-surface conditions and shorter seasonal sea-ice cover durations in the Norwegian Sea as compared to warm phases. Combined with additional palaeorecords and multi-model hosing simulations, our results suggest that during cold Greenland phases, reduced Atlantic meridional overturning circulation and cold North Atlantic sea-surface conditions were accompanied by the subsurface propagation of warm Atlantic waters that re-emerged in the Nordic Seas and provided moisture towards Greenland summit. Other/Unknown Material Greenland Nordic Seas North Atlantic Northeast Atlantic Norwegian Sea Sea ice Copernicus Publications: E-Journals Greenland Norwegian Sea Climate of the Past 13 6 729 739 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Dansgaard–Oeschger oscillations constitute one of the most enigmatic features of the last glacial cycle. Their cold atmospheric phases have been commonly associated with cold sea-surface temperatures and expansion of sea ice in the North Atlantic and adjacent seas. Here, based on dinocyst analyses from the 48–30 ka interval of four sediment cores from the northern Northeast Atlantic and southern Norwegian Sea, we provide direct and quantitative evidence of a regional paradoxical seesaw pattern: cold Greenland and North Atlantic phases coincide with warmer sea-surface conditions and shorter seasonal sea-ice cover durations in the Norwegian Sea as compared to warm phases. Combined with additional palaeorecords and multi-model hosing simulations, our results suggest that during cold Greenland phases, reduced Atlantic meridional overturning circulation and cold North Atlantic sea-surface conditions were accompanied by the subsurface propagation of warm Atlantic waters that re-emerged in the Nordic Seas and provided moisture towards Greenland summit. |
format |
Other/Unknown Material |
author |
Wary, Mélanie Eynaud, Frédérique Swingedouw, Didier Masson-Delmotte, Valérie Matthiessen, Jens Kissel, Catherine Zumaque, Jena Rossignol, Linda Jouzel, Jean |
spellingShingle |
Wary, Mélanie Eynaud, Frédérique Swingedouw, Didier Masson-Delmotte, Valérie Matthiessen, Jens Kissel, Catherine Zumaque, Jena Rossignol, Linda Jouzel, Jean Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events |
author_facet |
Wary, Mélanie Eynaud, Frédérique Swingedouw, Didier Masson-Delmotte, Valérie Matthiessen, Jens Kissel, Catherine Zumaque, Jena Rossignol, Linda Jouzel, Jean |
author_sort |
Wary, Mélanie |
title |
Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events |
title_short |
Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events |
title_full |
Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events |
title_fullStr |
Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events |
title_full_unstemmed |
Regional seesaw between the North Atlantic and Nordic Seas during the last glacial abrupt climate events |
title_sort |
regional seesaw between the north atlantic and nordic seas during the last glacial abrupt climate events |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-13-729-2017 https://cp.copernicus.org/articles/13/729/2017/ |
geographic |
Greenland Norwegian Sea |
geographic_facet |
Greenland Norwegian Sea |
genre |
Greenland Nordic Seas North Atlantic Northeast Atlantic Norwegian Sea Sea ice |
genre_facet |
Greenland Nordic Seas North Atlantic Northeast Atlantic Norwegian Sea Sea ice |
op_source |
eISSN: 1814-9332 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/243908 doi:10.5194/cp-13-729-2017 https://cp.copernicus.org/articles/13/729/2017/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-13-729-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
6 |
container_start_page |
729 |
op_container_end_page |
739 |
_version_ |
1766015442061623296 |