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Tasman leakage in a fine-resolution ocean model

Tasman leakage in a fine-resolution ocean model
Tasman leakage in a fine-resolution ocean model
Tasman leakage, the westward flow of thermocline waters south of Australia from the Pacific to the Indian Ocean, is one of the lesser-studied of the inter-ocean exchanges. Here, some of the properties of the Tasman leakage are inferred from Lagrangian particles integrated using the three-dimensional velocity fields of the 1/10 degree resolution OFES model. The mean Tasman leakage in this model is 4.2 Sv, with a standard deviation of 4.3 Sv. The heat flux associated with this leakage lies in the range 0.08–0.18 PW. There is large variability in the Tasman leakage on both sub-weekly and inter-annual scales, but no trend over the 1983–1997 period. Despite the large weekly variability, with peaks of more than 20 Sv, it appears that less than half of the Tasman leakage is carried within eddies.
0094-8276
L06601
van Sebille, Erik
4aec956c-2a78-4f85-8ead-4c943ac31662
England, Matthew H.
420875c0-8efb-4d92-9dca-249cfe5927b9
Zika, Jan D.
1843cce7-77ce-4ef6-9f79-bcf4f9db30e5
Sloyan, Bernadette M.
76a5a33f-4e74-4bfa-a330-688351a53717
van Sebille, Erik
4aec956c-2a78-4f85-8ead-4c943ac31662
England, Matthew H.
420875c0-8efb-4d92-9dca-249cfe5927b9
Zika, Jan D.
1843cce7-77ce-4ef6-9f79-bcf4f9db30e5
Sloyan, Bernadette M.
76a5a33f-4e74-4bfa-a330-688351a53717

van Sebille, Erik, England, Matthew H., Zika, Jan D. and Sloyan, Bernadette M. (2012) Tasman leakage in a fine-resolution ocean model. Geophysical Research Letters, 39 (6), L06601. (doi:10.1029/2012GL051004).

Record type: Article

Abstract

Tasman leakage, the westward flow of thermocline waters south of Australia from the Pacific to the Indian Ocean, is one of the lesser-studied of the inter-ocean exchanges. Here, some of the properties of the Tasman leakage are inferred from Lagrangian particles integrated using the three-dimensional velocity fields of the 1/10 degree resolution OFES model. The mean Tasman leakage in this model is 4.2 Sv, with a standard deviation of 4.3 Sv. The heat flux associated with this leakage lies in the range 0.08–0.18 PW. There is large variability in the Tasman leakage on both sub-weekly and inter-annual scales, but no trend over the 1983–1997 period. Despite the large weekly variability, with peaks of more than 20 Sv, it appears that less than half of the Tasman leakage is carried within eddies.

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Published date: 2012
Organisations: Physical Oceanography

Identifiers

Local EPrints ID: 337469
URI: https://eprints.soton.ac.uk/id/eprint/337469
ISSN: 0094-8276
PURE UUID: 8f2d9542-8171-499a-b03b-13d569f3d3d3

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Date deposited: 25 Apr 2012 13:08
Last modified: 18 Jul 2017 06:03

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Contributors

Author: Erik van Sebille
Author: Matthew H. England
Author: Jan D. Zika
Author: Bernadette M. Sloyan

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