Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current
Salt transport in the Irminger Current and thus the coupling between eastern and western subpolar North Atlantic plays an important role for climate variability across a wide range of time scales. High-resolution ocean modeling and observations indicate that 5 salinities in the eastern subpolar Nort...
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ftunivbern:oai:boris.unibe.ch:57889 2023-08-20T04:07:50+02:00 Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current Born, Andreas Stocker, Thomas Sandø, A. B. 2013 application/pdf https://boris.unibe.ch/57889/1/osd-10-555-2013.pdf https://boris.unibe.ch/57889/ eng eng Copernicus https://boris.unibe.ch/57889/ info:eu-repo/semantics/openAccess Born, Andreas; Stocker, Thomas; Sandø, A. B. (2013). Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current. Ocean Science Discussions, 10(2), pp. 555-579. Copernicus 10.5194/osd-10-555-2013 <http://dx.doi.org/10.5194/osd-10-555-2013> 530 Physics 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion NonPeerReviewed 2013 ftunivbern https://doi.org/10.5194/osd-10-555-2013 2023-07-31T21:10:58Z Salt transport in the Irminger Current and thus the coupling between eastern and western subpolar North Atlantic plays an important role for climate variability across a wide range of time scales. High-resolution ocean modeling and observations indicate that 5 salinities in the eastern subpolar North Atlantic decrease with enhanced circulation of the North Atlantic subpolar gyre (SPG). This has led to the perception that a stronger SPG also transports less salt westward. In this study, we analyze a regional ocean model and a comprehensive global coupled climate model, and show that a stronger SPG transports more salt in the Irminger Current irrespective of lower salinities in its 10 source region. The additional salt converges in the Labrador Sea and the Irminger Basin by eddy transports, increases surface salinity in the western SPG, and favors more intense deep convection. This is part of a positive feedback mechanism with potentially large implications for climate variability and predictability. Article in Journal/Newspaper Labrador Sea North Atlantic BORIS (Bern Open Repository and Information System, University of Bern) Irminger Basin ENVELOPE(-36.000,-36.000,61.000,61.000) |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics 550 Earth sciences & geology |
spellingShingle |
530 Physics 550 Earth sciences & geology Born, Andreas Stocker, Thomas Sandø, A. B. Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current |
topic_facet |
530 Physics 550 Earth sciences & geology |
description |
Salt transport in the Irminger Current and thus the coupling between eastern and western subpolar North Atlantic plays an important role for climate variability across a wide range of time scales. High-resolution ocean modeling and observations indicate that 5 salinities in the eastern subpolar North Atlantic decrease with enhanced circulation of the North Atlantic subpolar gyre (SPG). This has led to the perception that a stronger SPG also transports less salt westward. In this study, we analyze a regional ocean model and a comprehensive global coupled climate model, and show that a stronger SPG transports more salt in the Irminger Current irrespective of lower salinities in its 10 source region. The additional salt converges in the Labrador Sea and the Irminger Basin by eddy transports, increases surface salinity in the western SPG, and favors more intense deep convection. This is part of a positive feedback mechanism with potentially large implications for climate variability and predictability. |
format |
Article in Journal/Newspaper |
author |
Born, Andreas Stocker, Thomas Sandø, A. B. |
author_facet |
Born, Andreas Stocker, Thomas Sandø, A. B. |
author_sort |
Born, Andreas |
title |
Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current |
title_short |
Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current |
title_full |
Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current |
title_fullStr |
Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current |
title_full_unstemmed |
Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current |
title_sort |
coupling of eastern and western subpolar north atlantic: salt transport in the irminger current |
publisher |
Copernicus |
publishDate |
2013 |
url |
https://boris.unibe.ch/57889/1/osd-10-555-2013.pdf https://boris.unibe.ch/57889/ |
long_lat |
ENVELOPE(-36.000,-36.000,61.000,61.000) |
geographic |
Irminger Basin |
geographic_facet |
Irminger Basin |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
Born, Andreas; Stocker, Thomas; Sandø, A. B. (2013). Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current. Ocean Science Discussions, 10(2), pp. 555-579. Copernicus 10.5194/osd-10-555-2013 <http://dx.doi.org/10.5194/osd-10-555-2013> |
op_relation |
https://boris.unibe.ch/57889/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/osd-10-555-2013 |
_version_ |
1774719729527685120 |