Fluctuating Atlantic inflows modulate Arctic atlantification
Enhanced warm, salty subarctic inflows drive high-latitude atlantification, which weakens oceanic stratification, amplifies heat fluxes, and reduces sea ice. In this work, we show that the atmospheric Arctic Dipole (AD) associated with anticyclonic winds over North America and cyclonic winds over Eu...
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American Association for the Advancement of Science (AAAS)
2023
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Online Access: | http://dx.doi.org/10.1126/science.adh5158 https://www.science.org/doi/pdf/10.1126/science.adh5158 |
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craaas:10.1126/science.adh5158 2024-06-23T07:49:05+00:00 Fluctuating Atlantic inflows modulate Arctic atlantification Polyakov, Igor V. Ingvaldsen, Randi B. Pnyushkov, Andrey V. Bhatt, Uma S. Francis, Jennifer A. Janout, Markus Kwok, Ronald Skagseth, Øystein 2023 http://dx.doi.org/10.1126/science.adh5158 https://www.science.org/doi/pdf/10.1126/science.adh5158 en eng American Association for the Advancement of Science (AAAS) Science volume 381, issue 6661, page 972-979 ISSN 0036-8075 1095-9203 journal-article 2023 craaas https://doi.org/10.1126/science.adh5158 2024-06-13T04:01:03Z Enhanced warm, salty subarctic inflows drive high-latitude atlantification, which weakens oceanic stratification, amplifies heat fluxes, and reduces sea ice. In this work, we show that the atmospheric Arctic Dipole (AD) associated with anticyclonic winds over North America and cyclonic winds over Eurasia modulates inflows from the North Atlantic across the Nordic Seas. The alternating AD phases create a “switchgear mechanism.” From 2007 to 2021, this switchgear mechanism weakened northward inflows and enhanced sea-ice export across Fram Strait and increased inflows throughout the Barents Sea. By favoring stronger Arctic Ocean circulation, transferring freshwater into the Amerasian Basin, boosting stratification, and lowering oceanic heat fluxes there after 2007, AD+ contributed to slowing sea-ice loss. A transition to an AD− phase may accelerate the Arctic sea-ice decline, which would further change the Arctic climate system. Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas North Atlantic Sea ice Subarctic AAAS Resource Center (American Association for the Advancement of Science) Arctic Arctic Ocean Barents Sea Science 381 6661 972 979 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
Enhanced warm, salty subarctic inflows drive high-latitude atlantification, which weakens oceanic stratification, amplifies heat fluxes, and reduces sea ice. In this work, we show that the atmospheric Arctic Dipole (AD) associated with anticyclonic winds over North America and cyclonic winds over Eurasia modulates inflows from the North Atlantic across the Nordic Seas. The alternating AD phases create a “switchgear mechanism.” From 2007 to 2021, this switchgear mechanism weakened northward inflows and enhanced sea-ice export across Fram Strait and increased inflows throughout the Barents Sea. By favoring stronger Arctic Ocean circulation, transferring freshwater into the Amerasian Basin, boosting stratification, and lowering oceanic heat fluxes there after 2007, AD+ contributed to slowing sea-ice loss. A transition to an AD− phase may accelerate the Arctic sea-ice decline, which would further change the Arctic climate system. |
format |
Article in Journal/Newspaper |
author |
Polyakov, Igor V. Ingvaldsen, Randi B. Pnyushkov, Andrey V. Bhatt, Uma S. Francis, Jennifer A. Janout, Markus Kwok, Ronald Skagseth, Øystein |
spellingShingle |
Polyakov, Igor V. Ingvaldsen, Randi B. Pnyushkov, Andrey V. Bhatt, Uma S. Francis, Jennifer A. Janout, Markus Kwok, Ronald Skagseth, Øystein Fluctuating Atlantic inflows modulate Arctic atlantification |
author_facet |
Polyakov, Igor V. Ingvaldsen, Randi B. Pnyushkov, Andrey V. Bhatt, Uma S. Francis, Jennifer A. Janout, Markus Kwok, Ronald Skagseth, Øystein |
author_sort |
Polyakov, Igor V. |
title |
Fluctuating Atlantic inflows modulate Arctic atlantification |
title_short |
Fluctuating Atlantic inflows modulate Arctic atlantification |
title_full |
Fluctuating Atlantic inflows modulate Arctic atlantification |
title_fullStr |
Fluctuating Atlantic inflows modulate Arctic atlantification |
title_full_unstemmed |
Fluctuating Atlantic inflows modulate Arctic atlantification |
title_sort |
fluctuating atlantic inflows modulate arctic atlantification |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/science.adh5158 https://www.science.org/doi/pdf/10.1126/science.adh5158 |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas North Atlantic Sea ice Subarctic |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas North Atlantic Sea ice Subarctic |
op_source |
Science volume 381, issue 6661, page 972-979 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.adh5158 |
container_title |
Science |
container_volume |
381 |
container_issue |
6661 |
container_start_page |
972 |
op_container_end_page |
979 |
_version_ |
1802639360985661440 |