Annually resolved Atlantic sea surface temperature variability over the past 2,900 y
Global warming due to anthropogenic factors can be amplified or dampened by natural climate oscillations, especially those involving sea surface temperatures (SSTs) in the North Atlantic which vary on a multidecadal scale (Atlantic multidecadal variability, AMV). Because the instrumental record of A...
Published in: | Proceedings of the National Academy of Sciences |
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Online Access: | https://semaphore.uqar.ca/id/eprint/1695/ https://semaphore.uqar.ca/id/eprint/1695/1/Francois_Lapointe_et_al_octobre2020.pdf https://doi.org/10.1073/pnas.2014166117 |
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ftunivquebecar:oai:semaphore.uqar.ca:1695 2023-10-29T02:34:03+01:00 Annually resolved Atlantic sea surface temperature variability over the past 2,900 y Lapointe, Francois Bradley, Raymond S. Francus, Pierre Balascio, Nicholas L. Abbott, Mark B. Stoner, Joseph S. St-Onge, Guillaume De Coninck, Arnaud S. Labarre, Thibault 2020 application/pdf https://semaphore.uqar.ca/id/eprint/1695/ https://semaphore.uqar.ca/id/eprint/1695/1/Francois_Lapointe_et_al_octobre2020.pdf https://doi.org/10.1073/pnas.2014166117 fr fre https://semaphore.uqar.ca/id/eprint/1695/1/Francois_Lapointe_et_al_octobre2020.pdf Lapointe, Francois, Bradley, Raymond S., Francus, Pierre, Balascio, Nicholas L., Abbott, Mark B., Stoner, Joseph S., St-Onge, Guillaume orcid:0000-0001-6958-4217 , De Coninck, Arnaud S. et Labarre, Thibault (2020). Annually resolved Atlantic sea surface temperature variability over the past 2,900 y. Proceedings of the National Academy of Sciences of the United States of America . Article Évalué par les pairs 2020 ftunivquebecar https://doi.org/10.1073/pnas.2014166117 2023-09-30T23:10:37Z Global warming due to anthropogenic factors can be amplified or dampened by natural climate oscillations, especially those involving sea surface temperatures (SSTs) in the North Atlantic which vary on a multidecadal scale (Atlantic multidecadal variability, AMV). Because the instrumental record of AMV is short, long-term behavior of AMV is unknown, but climatic teleconnections to regions beyond the North Atlantic offer the prospect of reconstructing AMV from high-resolution records elsewhere. Annually resolved titanium from an annually laminated sedimentary record from Ellesmere Island, Canada, shows that the record is strongly influenced by AMV via atmospheric circulation anomalies. Significant correlations between this High-Arctic proxy and other highly resolved Atlantic SST proxies demonstrate that it shares the multidecadal variability seen in the Atlantic. Our record provides a reconstruction of AMV for the past ∼3 millennia at an unprecedented time resolution, indicating North Atlantic SSTs were coldest from ∼1400–1800 CE, while current SSTs are the warmest in the past ∼2,900 y. -- Keywords : Atlantic multidecadal variability Arctic climate global warming. Article in Journal/Newspaper Arctic Ellesmere Island Global warming North Atlantic Université du Québec à Rimouski (UQAR): Sémaphore Proceedings of the National Academy of Sciences 117 44 27171 27178 |
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Open Polar |
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Université du Québec à Rimouski (UQAR): Sémaphore |
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ftunivquebecar |
language |
French |
description |
Global warming due to anthropogenic factors can be amplified or dampened by natural climate oscillations, especially those involving sea surface temperatures (SSTs) in the North Atlantic which vary on a multidecadal scale (Atlantic multidecadal variability, AMV). Because the instrumental record of AMV is short, long-term behavior of AMV is unknown, but climatic teleconnections to regions beyond the North Atlantic offer the prospect of reconstructing AMV from high-resolution records elsewhere. Annually resolved titanium from an annually laminated sedimentary record from Ellesmere Island, Canada, shows that the record is strongly influenced by AMV via atmospheric circulation anomalies. Significant correlations between this High-Arctic proxy and other highly resolved Atlantic SST proxies demonstrate that it shares the multidecadal variability seen in the Atlantic. Our record provides a reconstruction of AMV for the past ∼3 millennia at an unprecedented time resolution, indicating North Atlantic SSTs were coldest from ∼1400–1800 CE, while current SSTs are the warmest in the past ∼2,900 y. -- Keywords : Atlantic multidecadal variability Arctic climate global warming. |
format |
Article in Journal/Newspaper |
author |
Lapointe, Francois Bradley, Raymond S. Francus, Pierre Balascio, Nicholas L. Abbott, Mark B. Stoner, Joseph S. St-Onge, Guillaume De Coninck, Arnaud S. Labarre, Thibault |
spellingShingle |
Lapointe, Francois Bradley, Raymond S. Francus, Pierre Balascio, Nicholas L. Abbott, Mark B. Stoner, Joseph S. St-Onge, Guillaume De Coninck, Arnaud S. Labarre, Thibault Annually resolved Atlantic sea surface temperature variability over the past 2,900 y |
author_facet |
Lapointe, Francois Bradley, Raymond S. Francus, Pierre Balascio, Nicholas L. Abbott, Mark B. Stoner, Joseph S. St-Onge, Guillaume De Coninck, Arnaud S. Labarre, Thibault |
author_sort |
Lapointe, Francois |
title |
Annually resolved Atlantic sea surface temperature variability over the past 2,900 y |
title_short |
Annually resolved Atlantic sea surface temperature variability over the past 2,900 y |
title_full |
Annually resolved Atlantic sea surface temperature variability over the past 2,900 y |
title_fullStr |
Annually resolved Atlantic sea surface temperature variability over the past 2,900 y |
title_full_unstemmed |
Annually resolved Atlantic sea surface temperature variability over the past 2,900 y |
title_sort |
annually resolved atlantic sea surface temperature variability over the past 2,900 y |
publishDate |
2020 |
url |
https://semaphore.uqar.ca/id/eprint/1695/ https://semaphore.uqar.ca/id/eprint/1695/1/Francois_Lapointe_et_al_octobre2020.pdf https://doi.org/10.1073/pnas.2014166117 |
genre |
Arctic Ellesmere Island Global warming North Atlantic |
genre_facet |
Arctic Ellesmere Island Global warming North Atlantic |
op_relation |
https://semaphore.uqar.ca/id/eprint/1695/1/Francois_Lapointe_et_al_octobre2020.pdf Lapointe, Francois, Bradley, Raymond S., Francus, Pierre, Balascio, Nicholas L., Abbott, Mark B., Stoner, Joseph S., St-Onge, Guillaume orcid:0000-0001-6958-4217 , De Coninck, Arnaud S. et Labarre, Thibault (2020). Annually resolved Atlantic sea surface temperature variability over the past 2,900 y. Proceedings of the National Academy of Sciences of the United States of America . |
op_doi |
https://doi.org/10.1073/pnas.2014166117 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
117 |
container_issue |
44 |
container_start_page |
27171 |
op_container_end_page |
27178 |
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1781056444695576576 |