Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean
A 15‐year (2004–2018) record of mooring observations from the upper 50 m of the ocean in the eastern Eurasian Basin reveals increased current speeds and vertical shear, associated with an increasing coupling between wind, ice, and the upper ocean over 2004–2018, particularly in summer. Substantial i...
Published in: | Geophysical Research Letters |
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Online Access: | https://hdl.handle.net/11250/2733427 https://doi.org/10.1029/2020GL089469 |
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ftunivbergen:oai:bora.uib.no:11250/2733427 2023-05-15T15:04:13+02:00 Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean Polyakov, Igor V. Rippeth, Tom Fer, Ilker Baumann, Till Martin Carmack, Eddy C. Ivanov, Vladimir V. Janout, Markus Padman, Laurie Pnyushkov, A.V. Rember, Robert 2020 application/pdf https://hdl.handle.net/11250/2733427 https://doi.org/10.1029/2020GL089469 eng eng Wiley Norges forskningsråd: 294396 urn:issn:0094-8276 https://hdl.handle.net/11250/2733427 https://doi.org/10.1029/2020GL089469 cristin:1825520 Geophysical Research Letters. 2020, 47 (16), e2020GL089469. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020. The Authors. e2020GL089469 Geophysical Research Letters 47 16 VDP::Oseanografi: 452 VDP::Oceanography: 452 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1029/2020GL089469 2023-03-14T17:39:06Z A 15‐year (2004–2018) record of mooring observations from the upper 50 m of the ocean in the eastern Eurasian Basin reveals increased current speeds and vertical shear, associated with an increasing coupling between wind, ice, and the upper ocean over 2004–2018, particularly in summer. Substantial increases in current speeds and shears in the upper 50 m are dominated by a two times amplification of currents in the semidiurnal band, which includes tides and wind‐forced near‐inertial oscillations. For the first time the strengthened upper ocean currents and shear are observed to coincide with weakening stratification. This coupling links the Atlantic Water heat to the sea ice, a consequence of which would be reducing regional sea ice volume. These results point to a new positive feedback mechanism in which reduced sea ice extent facilitates more energetic inertial oscillations and associated upper‐ocean shear, thus leading to enhanced ventilation of the Atlantic Water. publishedVersion Article in Journal/Newspaper Arctic Arctic Ocean Sea ice University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Arctic Ocean Geophysical Research Letters 47 16 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
VDP::Oseanografi: 452 VDP::Oceanography: 452 |
spellingShingle |
VDP::Oseanografi: 452 VDP::Oceanography: 452 Polyakov, Igor V. Rippeth, Tom Fer, Ilker Baumann, Till Martin Carmack, Eddy C. Ivanov, Vladimir V. Janout, Markus Padman, Laurie Pnyushkov, A.V. Rember, Robert Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean |
topic_facet |
VDP::Oseanografi: 452 VDP::Oceanography: 452 |
description |
A 15‐year (2004–2018) record of mooring observations from the upper 50 m of the ocean in the eastern Eurasian Basin reveals increased current speeds and vertical shear, associated with an increasing coupling between wind, ice, and the upper ocean over 2004–2018, particularly in summer. Substantial increases in current speeds and shears in the upper 50 m are dominated by a two times amplification of currents in the semidiurnal band, which includes tides and wind‐forced near‐inertial oscillations. For the first time the strengthened upper ocean currents and shear are observed to coincide with weakening stratification. This coupling links the Atlantic Water heat to the sea ice, a consequence of which would be reducing regional sea ice volume. These results point to a new positive feedback mechanism in which reduced sea ice extent facilitates more energetic inertial oscillations and associated upper‐ocean shear, thus leading to enhanced ventilation of the Atlantic Water. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Polyakov, Igor V. Rippeth, Tom Fer, Ilker Baumann, Till Martin Carmack, Eddy C. Ivanov, Vladimir V. Janout, Markus Padman, Laurie Pnyushkov, A.V. Rember, Robert |
author_facet |
Polyakov, Igor V. Rippeth, Tom Fer, Ilker Baumann, Till Martin Carmack, Eddy C. Ivanov, Vladimir V. Janout, Markus Padman, Laurie Pnyushkov, A.V. Rember, Robert |
author_sort |
Polyakov, Igor V. |
title |
Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean |
title_short |
Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean |
title_full |
Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean |
title_fullStr |
Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean |
title_full_unstemmed |
Intensification of Near‐Surface Currents and Shear in the Eastern Arctic Ocean |
title_sort |
intensification of near‐surface currents and shear in the eastern arctic ocean |
publisher |
Wiley |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2733427 https://doi.org/10.1029/2020GL089469 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
e2020GL089469 Geophysical Research Letters 47 16 |
op_relation |
Norges forskningsråd: 294396 urn:issn:0094-8276 https://hdl.handle.net/11250/2733427 https://doi.org/10.1029/2020GL089469 cristin:1825520 Geophysical Research Letters. 2020, 47 (16), e2020GL089469. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020. The Authors. |
op_doi |
https://doi.org/10.1029/2020GL089469 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
16 |
_version_ |
1766336024399577088 |