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The influence of atmospheric circulation on the dynamics of the intermediate water layer in the eastern part of the St. Anna Trough

The influence of atmospheric circulation on the dynamics of the intermediate water layer in the eastern part of the St. Anna Trough
The influence of atmospheric circulation on the dynamics of the intermediate water layer in the eastern part of the St. Anna Trough
This paper discusses the results of unique direct observations over the current velocities in the eastern part of the St. Anna deep-water trough, made in the period from August 2009 until September 2010, and analyzes the physical ways how the temporal variability of currents is formed. The stable northward barotropic transport with an average annual velocity of about 20 cm/s was discovered. It was found that changes in velocity with a characteristic timescale of several weeks occurred synchronously in the entire water column and were determined by the deformation of the sea level field due to long-period disturbances of the large-scale field of ground wind above the northern parts of Barents and Kara seas. For the winds of the southwest and west directions, the sea level’s gradient is formed across the St. Anna Trough and the northward meridional water transport is intensified owing to the geostrophic adjustment. These are verified by the results of numerical simulation.
1028-334X
630-633
Kirillov, S.A.
1ebe3f33-096d-4f3b-953e-a94c779ddea4
Dmitrenko, I.A.
f4987f6e-7606-4f9e-a962-7cca1e54f111
Ivanov, V.V.
0d6e67c1-2f3b-4885-824e-33effe3486e9
Aksenov, Y.O.
1d277047-06f6-4893-8bcf-c2817a9c848e
Makhotin, M.S.
4b713249-75f1-46ff-939f-824a6f4d299b
de Cuevas, B.A.
01cc697c-2832-4de6-87bf-bf9f16c1f906
Kirillov, S.A.
1ebe3f33-096d-4f3b-953e-a94c779ddea4
Dmitrenko, I.A.
f4987f6e-7606-4f9e-a962-7cca1e54f111
Ivanov, V.V.
0d6e67c1-2f3b-4885-824e-33effe3486e9
Aksenov, Y.O.
1d277047-06f6-4893-8bcf-c2817a9c848e
Makhotin, M.S.
4b713249-75f1-46ff-939f-824a6f4d299b
de Cuevas, B.A.
01cc697c-2832-4de6-87bf-bf9f16c1f906

Kirillov, S.A., Dmitrenko, I.A., Ivanov, V.V., Aksenov, Y.O., Makhotin, M.S. and de Cuevas, B.A. (2012) The influence of atmospheric circulation on the dynamics of the intermediate water layer in the eastern part of the St. Anna Trough. Doklady Earth Sciences, 444 (1), 630-633. (doi:10.1134/S1028334X12050121).

Record type: Article

Abstract

This paper discusses the results of unique direct observations over the current velocities in the eastern part of the St. Anna deep-water trough, made in the period from August 2009 until September 2010, and analyzes the physical ways how the temporal variability of currents is formed. The stable northward barotropic transport with an average annual velocity of about 20 cm/s was discovered. It was found that changes in velocity with a characteristic timescale of several weeks occurred synchronously in the entire water column and were determined by the deformation of the sea level field due to long-period disturbances of the large-scale field of ground wind above the northern parts of Barents and Kara seas. For the winds of the southwest and west directions, the sea level’s gradient is formed across the St. Anna Trough and the northward meridional water transport is intensified owing to the geostrophic adjustment. These are verified by the results of numerical simulation.

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Published date: 2012
Organisations: Marine Systems Modelling

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Local EPrints ID: 207961
URI: https://eprints.soton.ac.uk/id/eprint/207961
ISSN: 1028-334X
PURE UUID: c5560968-b13d-49c4-a84c-9ba9164b1ffe

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Date deposited: 13 Jan 2012 10:51
Last modified: 18 Jul 2017 10:49

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Contributors

Author: S.A. Kirillov
Author: I.A. Dmitrenko
Author: V.V. Ivanov
Author: Y.O. Aksenov
Author: M.S. Makhotin
Author: B.A. de Cuevas

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