Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure
We use eighteen timescale-synchronised near-surface temperature reconstructions spanning 10–50 thousand years before present to clarify the regional expression of Dansgaard-Oeschger (D-O) and Heinrich (H) events in the North Atlantic. The North Atlantic Drift region shows D-O temperature variations...
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Language: | English |
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Elsevier BV
2022
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ftarchimer:oai:archimer.ifremer.fr:89088 2023-05-15T16:26:52+02:00 Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure Pedro, J.b. Andersson, C. Vettoretti, G. Voelker, A.h.l. Waelbroeck, C. Dokken, T.m. Jensen, M.f. Rasmussen, S.o. Sessford, E.g. Jochum, M. Nisancioglu, K.h. 2022-08 application/pdf https://archimer.ifremer.fr/doc/00779/89088/94681.pdf https://archimer.ifremer.fr/doc/00779/89088/94683.zip https://doi.org/10.1016/j.quascirev.2022.107599 https://archimer.ifremer.fr/doc/00779/89088/ eng eng Elsevier BV info:eu-repo/grantAgreement/EC/FP7/610055/EU//ICE2ICE https://archimer.ifremer.fr/doc/00779/89088/94681.pdf https://archimer.ifremer.fr/doc/00779/89088/94683.zip doi:10.1016/j.quascirev.2022.107599 https://archimer.ifremer.fr/doc/00779/89088/ info:eu-repo/semantics/openAccess restricted use Quaternary Science Reviews (0277-3791) (Elsevier BV), 2022-08 , Vol. 289 , P. 107599 (16p.) Dansgaard-Oeschger event Heinrich event abrupt climate change marine sediment core ice core sea ice text Publication info:eu-repo/semantics/article 2022 ftarchimer https://doi.org/10.1016/j.quascirev.2022.107599 2023-03-14T23:55:22Z We use eighteen timescale-synchronised near-surface temperature reconstructions spanning 10–50 thousand years before present to clarify the regional expression of Dansgaard-Oeschger (D-O) and Heinrich (H) events in the North Atlantic. The North Atlantic Drift region shows D-O temperature variations of ca. 2–5° with Greenland-like structure. The Western Iberian Margin region also shows Greenland-like structure, but with more pronounced surface cooling between interstadials and Heinrich stadials (ca. 6–9 °C) than between interstadials and non-Heinrich stadials (ca. 2–3 °C). The southern Nordic Seas show smaller D-O temperature anomalies (ca. 1–2 °C) that appear out of phase with Greenland. These spatial patterns are replicated in a new global climate model simulation that features unforced (D-O-like) and freshwater forced (H-like) abrupt climate changes. The model simulations and observations suggest consistently that the spatial expression and amplitude of D-O and H event temperature anomalies are dominated by coupled changes in the Atlantic Meridional Overturning, sea ice extent, polar front position and thermocline structure. Article in Journal/Newspaper Greenland ice core Nordic Seas North Atlantic Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Greenland Quaternary Science Reviews 289 107599 |
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 |
topic |
Dansgaard-Oeschger event Heinrich event abrupt climate change marine sediment core ice core sea ice |
spellingShingle |
Dansgaard-Oeschger event Heinrich event abrupt climate change marine sediment core ice core sea ice Pedro, J.b. Andersson, C. Vettoretti, G. Voelker, A.h.l. Waelbroeck, C. Dokken, T.m. Jensen, M.f. Rasmussen, S.o. Sessford, E.g. Jochum, M. Nisancioglu, K.h. Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure |
topic_facet |
Dansgaard-Oeschger event Heinrich event abrupt climate change marine sediment core ice core sea ice |
description |
We use eighteen timescale-synchronised near-surface temperature reconstructions spanning 10–50 thousand years before present to clarify the regional expression of Dansgaard-Oeschger (D-O) and Heinrich (H) events in the North Atlantic. The North Atlantic Drift region shows D-O temperature variations of ca. 2–5° with Greenland-like structure. The Western Iberian Margin region also shows Greenland-like structure, but with more pronounced surface cooling between interstadials and Heinrich stadials (ca. 6–9 °C) than between interstadials and non-Heinrich stadials (ca. 2–3 °C). The southern Nordic Seas show smaller D-O temperature anomalies (ca. 1–2 °C) that appear out of phase with Greenland. These spatial patterns are replicated in a new global climate model simulation that features unforced (D-O-like) and freshwater forced (H-like) abrupt climate changes. The model simulations and observations suggest consistently that the spatial expression and amplitude of D-O and H event temperature anomalies are dominated by coupled changes in the Atlantic Meridional Overturning, sea ice extent, polar front position and thermocline structure. |
format |
Article in Journal/Newspaper |
author |
Pedro, J.b. Andersson, C. Vettoretti, G. Voelker, A.h.l. Waelbroeck, C. Dokken, T.m. Jensen, M.f. Rasmussen, S.o. Sessford, E.g. Jochum, M. Nisancioglu, K.h. |
author_facet |
Pedro, J.b. Andersson, C. Vettoretti, G. Voelker, A.h.l. Waelbroeck, C. Dokken, T.m. Jensen, M.f. Rasmussen, S.o. Sessford, E.g. Jochum, M. Nisancioglu, K.h. |
author_sort |
Pedro, J.b. |
title |
Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure |
title_short |
Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure |
title_full |
Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure |
title_fullStr |
Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure |
title_full_unstemmed |
Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure |
title_sort |
dansgaard-oeschger and heinrich event temperature anomalies in the north atlantic set by sea ice, frontal position and thermocline structure |
publisher |
Elsevier BV |
publishDate |
2022 |
url |
https://archimer.ifremer.fr/doc/00779/89088/94681.pdf https://archimer.ifremer.fr/doc/00779/89088/94683.zip https://doi.org/10.1016/j.quascirev.2022.107599 https://archimer.ifremer.fr/doc/00779/89088/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Nordic Seas North Atlantic Sea ice |
genre_facet |
Greenland ice core Nordic Seas North Atlantic Sea ice |
op_source |
Quaternary Science Reviews (0277-3791) (Elsevier BV), 2022-08 , Vol. 289 , P. 107599 (16p.) |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/610055/EU//ICE2ICE https://archimer.ifremer.fr/doc/00779/89088/94681.pdf https://archimer.ifremer.fr/doc/00779/89088/94683.zip doi:10.1016/j.quascirev.2022.107599 https://archimer.ifremer.fr/doc/00779/89088/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.quascirev.2022.107599 |
container_title |
Quaternary Science Reviews |
container_volume |
289 |
container_start_page |
107599 |
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1766015861334736896 |