Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways
Under previous reconstructions of late Pliocene boundary conditions, climate models have failed to reproduce the warm sea surface temperatures reconstructed in the North Atlantic. Using a reconstruction of mid-Piacenzian paleogeography that has the Bering Strait and Canadian Arctic Archipelago Strai...
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Online Access: | https://doi.org/10.1002/2016GL071805 |
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ftncar:oai:drupal-site.org:articles_19534 2023-09-05T13:16:00+02:00 Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways Otto-Bliesner, Bette L. (author) Jahn, Alexandra (author) Feng, Ran (author) Brady, Esther C. (author) Hu, Aixue (author) Löfverström, Marcus (author) 2017-01-28 https://doi.org/10.1002/2016GL071805 en eng Geophysical Research Letters--Geophys. Res. Lett.--00948276 articles:19534 ark:/85065/d7222wkk doi:10.1002/2016GL071805 Copyright 2017 American Geophysical Union. article Text 2017 ftncar https://doi.org/10.1002/2016GL071805 2023-08-14T18:46:13Z Under previous reconstructions of late Pliocene boundary conditions, climate models have failed to reproduce the warm sea surface temperatures reconstructed in the North Atlantic. Using a reconstruction of mid-Piacenzian paleogeography that has the Bering Strait and Canadian Arctic Archipelago Straits closed, however, improves the simulation of the proxy-indicated warm sea surface temperatures in the North Atlantic in the Community Climate System Model. We find that the closure of these small Arctic gateways strengthens the Atlantic Meridional Overturning Circulation, by inhibiting freshwater transport from the Pacific to the Arctic Ocean and from the Arctic Ocean to the Labrador Sea, leading to warmer sea surface temperatures in the North Atlantic. This indicates that the state of the Arctic gateways may influence the sensitivity of the North Atlantic climate in complex ways, and better understanding of the state of these Arctic gateways for past time periods is needed. PLR-1418411 DE-SC0012606 EAR1237211 Article in Journal/Newspaper Arctic Archipelago Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Labrador Sea North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Pacific Geophysical Research Letters 44 2 957 964 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Under previous reconstructions of late Pliocene boundary conditions, climate models have failed to reproduce the warm sea surface temperatures reconstructed in the North Atlantic. Using a reconstruction of mid-Piacenzian paleogeography that has the Bering Strait and Canadian Arctic Archipelago Straits closed, however, improves the simulation of the proxy-indicated warm sea surface temperatures in the North Atlantic in the Community Climate System Model. We find that the closure of these small Arctic gateways strengthens the Atlantic Meridional Overturning Circulation, by inhibiting freshwater transport from the Pacific to the Arctic Ocean and from the Arctic Ocean to the Labrador Sea, leading to warmer sea surface temperatures in the North Atlantic. This indicates that the state of the Arctic gateways may influence the sensitivity of the North Atlantic climate in complex ways, and better understanding of the state of these Arctic gateways for past time periods is needed. PLR-1418411 DE-SC0012606 EAR1237211 |
author2 |
Otto-Bliesner, Bette L. (author) Jahn, Alexandra (author) Feng, Ran (author) Brady, Esther C. (author) Hu, Aixue (author) Löfverström, Marcus (author) |
format |
Article in Journal/Newspaper |
title |
Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways |
spellingShingle |
Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways |
title_short |
Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways |
title_full |
Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways |
title_fullStr |
Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways |
title_full_unstemmed |
Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways |
title_sort |
amplified north atlantic warming in the late pliocene by changes in arctic gateways |
publishDate |
2017 |
url |
https://doi.org/10.1002/2016GL071805 |
geographic |
Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Pacific |
geographic_facet |
Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Pacific |
genre |
Arctic Archipelago Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Labrador Sea North Atlantic |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Labrador Sea North Atlantic |
op_relation |
Geophysical Research Letters--Geophys. Res. Lett.--00948276 articles:19534 ark:/85065/d7222wkk doi:10.1002/2016GL071805 |
op_rights |
Copyright 2017 American Geophysical Union. |
op_doi |
https://doi.org/10.1002/2016GL071805 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
2 |
container_start_page |
957 |
op_container_end_page |
964 |
_version_ |
1776197761735065600 |