Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas
Ocean state estimates from SODA assimilation are analyzed to understand how major shifts in the North Atlantic Current path relate to AMOC, and how these shifts are related to large scale ocean circulation and surface forcing. These complement surface-drifter and altimetry data showing the same even...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20110015164 2023-05-15T17:24:22+02:00 Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas Rhines, P. B. Hakkinen, Sirpa M. Unclassified, Unlimited, Publicly available February 22, 2010 application/pdf http://hdl.handle.net/2060/20110015164 unknown Document ID: 20110015164 http://hdl.handle.net/2060/20110015164 Copyright, Distribution as joint owner in the copyright CASI Oceanography GSFC.ABS.4747.2011 2010 Ocean Sciences Meeting; 22-26 Feb. 2010; Portland, OR; United States 2010 ftnasantrs 2019-07-21T01:00:06Z Ocean state estimates from SODA assimilation are analyzed to understand how major shifts in the North Atlantic Current path relate to AMOC, and how these shifts are related to large scale ocean circulation and surface forcing. These complement surface-drifter and altimetry data showing the same events. SODA data indicate that the warm water limb of AMOC, reaching to at least 600m depth, expanded in density/salinity space greatly after 1995, and that Similar events occurred in the late 1960s and around 1980. While there were large changes in the upper limb, there was no immediate response in the dense return flow, at least not in SODA, however one would expect a delayed response of increasing AMOC due to the positive feedback from increased salt transport. These upper limb changes are winddriven, involving changes in the eastern subpolar gyre, visible in the subduction of low potential vorticity waters. The subtropical gyre has been weak during the times of the northward intrusions of the highly saline subtropical waters, while the NAO index has been neutral or in a negative phase. The image of subtropical/subpolar gyre exchange through teleconnections within the AMOC overturning cell will be described. Other/Unknown Material Nordic Seas north atlantic current North Atlantic NASA Technical Reports Server (NTRS) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
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unknown |
topic |
Oceanography |
spellingShingle |
Oceanography Rhines, P. B. Hakkinen, Sirpa M. Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas |
topic_facet |
Oceanography |
description |
Ocean state estimates from SODA assimilation are analyzed to understand how major shifts in the North Atlantic Current path relate to AMOC, and how these shifts are related to large scale ocean circulation and surface forcing. These complement surface-drifter and altimetry data showing the same events. SODA data indicate that the warm water limb of AMOC, reaching to at least 600m depth, expanded in density/salinity space greatly after 1995, and that Similar events occurred in the late 1960s and around 1980. While there were large changes in the upper limb, there was no immediate response in the dense return flow, at least not in SODA, however one would expect a delayed response of increasing AMOC due to the positive feedback from increased salt transport. These upper limb changes are winddriven, involving changes in the eastern subpolar gyre, visible in the subduction of low potential vorticity waters. The subtropical gyre has been weak during the times of the northward intrusions of the highly saline subtropical waters, while the NAO index has been neutral or in a negative phase. The image of subtropical/subpolar gyre exchange through teleconnections within the AMOC overturning cell will be described. |
format |
Other/Unknown Material |
author |
Rhines, P. B. Hakkinen, Sirpa M. |
author_facet |
Rhines, P. B. Hakkinen, Sirpa M. |
author_sort |
Rhines, P. B. |
title |
Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas |
title_short |
Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas |
title_full |
Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas |
title_fullStr |
Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas |
title_full_unstemmed |
Linking The Atlantic Gyres: Warm, Saline Intrusions From Subtropical Atlantic to the Nordic Seas |
title_sort |
linking the atlantic gyres: warm, saline intrusions from subtropical atlantic to the nordic seas |
publishDate |
2010 |
url |
http://hdl.handle.net/2060/20110015164 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Nordic Seas north atlantic current North Atlantic |
genre_facet |
Nordic Seas north atlantic current North Atlantic |
op_source |
CASI |
op_relation |
Document ID: 20110015164 http://hdl.handle.net/2060/20110015164 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766115329914699776 |