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The North Atlantic inflow to the Arctic Ocean: high-resolution model study

The North Atlantic inflow to the Arctic Ocean: high-resolution model study
The North Atlantic inflow to the Arctic Ocean: high-resolution model study
North Atlantic Water (NAW) plays a central role in the ocean climate of the Nordic Seas and Arctic Ocean. Whereas the pathways of the NAW in the Nordic Seas are mostly known, those into the Arctic Ocean are yet to be fully understood. To elucidate these routes the results of a high-resolution global coupled ice–ocean model are used. We demonstrate that in 1989–2004 the NAW inflow was equally divided between the Fram Strait and Barents Sea. We find that salt influx within the branches is comparable but that most of the heat entered the Arctic Ocean through Fram Strait. The model shows complex NAW circulation patterns in the Barents Sea. Two mode waters in the Barents Sea branch are identified: a halocline water produced by surface cooling at shallow convective sites in the northern Barents Sea, and bottom water formed from NAW in the southeastern Barents Sea via full-depth convection and mixing. These two modes continue into the Nansen Basin along two separate routes: one through the northern Barents Sea shelf, and the other through the southeastern Barents Sea with halocline mode water dominating the outflow. Overall, less than half of the NAW coming into the Nordic Seas reaches the Arctic Ocean relatively unmodified, and the rest of it will have been modified in the Barents and Kara Seas with a large fraction re-circulating into the North Atlantic.

Arctic Ocean, Nordic Seas, North Atlantic Water, Ocean modelling, Oceanic transports, Water mass transformation
0924-7963
1-22
Aksenov, Yevgeny
1d277047-06f6-4893-8bcf-c2817a9c848e
Bacon, Sheldon
1e7aa6e3-4fb4-4230-8ba7-90837304a9a7
Coward, Andrew C.
53b78140-2e65-476a-b287-e8384a65224b
Nurser, A.J. George
2493ef9a-21e9-4d8b-9c32-08677e7e145a
Aksenov, Yevgeny
1d277047-06f6-4893-8bcf-c2817a9c848e
Bacon, Sheldon
1e7aa6e3-4fb4-4230-8ba7-90837304a9a7
Coward, Andrew C.
53b78140-2e65-476a-b287-e8384a65224b
Nurser, A.J. George
2493ef9a-21e9-4d8b-9c32-08677e7e145a

Aksenov, Yevgeny, Bacon, Sheldon, Coward, Andrew C. and Nurser, A.J. George (2010) The North Atlantic inflow to the Arctic Ocean: high-resolution model study. Journal of Marine Systems, 79 (1-2), 1-22. (doi:10.1016/j.jmarsys.2009.05.003).

Record type: Article

Abstract

North Atlantic Water (NAW) plays a central role in the ocean climate of the Nordic Seas and Arctic Ocean. Whereas the pathways of the NAW in the Nordic Seas are mostly known, those into the Arctic Ocean are yet to be fully understood. To elucidate these routes the results of a high-resolution global coupled ice–ocean model are used. We demonstrate that in 1989–2004 the NAW inflow was equally divided between the Fram Strait and Barents Sea. We find that salt influx within the branches is comparable but that most of the heat entered the Arctic Ocean through Fram Strait. The model shows complex NAW circulation patterns in the Barents Sea. Two mode waters in the Barents Sea branch are identified: a halocline water produced by surface cooling at shallow convective sites in the northern Barents Sea, and bottom water formed from NAW in the southeastern Barents Sea via full-depth convection and mixing. These two modes continue into the Nansen Basin along two separate routes: one through the northern Barents Sea shelf, and the other through the southeastern Barents Sea with halocline mode water dominating the outflow. Overall, less than half of the NAW coming into the Nordic Seas reaches the Arctic Ocean relatively unmodified, and the rest of it will have been modified in the Barents and Kara Seas with a large fraction re-circulating into the North Atlantic.

Full text not available from this repository.

More information

Published date: January 2010
Keywords: Arctic Ocean, Nordic Seas, North Atlantic Water, Ocean modelling, Oceanic transports, Water mass transformation
Organisations: Marine Systems Modelling, Marine Physics and Ocean Climate

Identifiers

Local EPrints ID: 69763
URI: http://eprints.soton.ac.uk/id/eprint/69763
ISSN: 0924-7963
PURE UUID: 9632a92c-d48c-45ee-b542-9c7d9ced8a12

Catalogue record

Date deposited: 01 Dec 2009
Last modified: 19 Jul 2019 23:47

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