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The Oceanic Eddy Heat Transport

The Oceanic Eddy Heat Transport
The Oceanic Eddy Heat Transport
The rectified eddy heat transport is calculated from a global high resolution ocean general circulation model. The eddy heat transport is found to be strong in the western boundary currents, the Antarctic Circumpolar Current, and the equatorial region. It is generally weak in the central gyres. It is also found to be largely confined to the upper 1000 meters of the ocean model. The eddy heat transport is separated into its rotational and divergent components. The rotational component of the eddy heat transport is strong in the western boundary currents, while the divergent component is strongest in the equatorial region and Antarctic Circumpolar Current. In the equatorial region, the eddy heat transport is due to tropical instability waves, while in the western boundary currents and the Antarctic Circumpolar Current the large eddy heat transports arise from the meandering of the currents. Stammer’s method for estimating the eddy heat transport from an eddy diffusivity derived from mixing length arguments, using altimetry data and the climatological temperature field, is tested and fails to reproduce the model’s directly evaluated eddy heat transport in the equatorial regions and the western boundary currents. Possible reasons for the discrepancy are explored. However, in the Antarctic Circumpolar Current region, the model’s eddy heat transport is shown to agree well with his estimate.
0022-3670
3328-3345
Jayne, S.R.
cf9d5883-3ed5-4f99-b121-e10422a39d31
Marotzke, J.
6047bfd1-68a3-4abe-95ce-e1df9a56ce76
Jayne, S.R.
cf9d5883-3ed5-4f99-b121-e10422a39d31
Marotzke, J.
6047bfd1-68a3-4abe-95ce-e1df9a56ce76

Jayne, S.R. and Marotzke, J. (2002) The Oceanic Eddy Heat Transport. Journal of Physical Oceanography, 32 (12), 3328-3345.

Record type: Article

Abstract

The rectified eddy heat transport is calculated from a global high resolution ocean general circulation model. The eddy heat transport is found to be strong in the western boundary currents, the Antarctic Circumpolar Current, and the equatorial region. It is generally weak in the central gyres. It is also found to be largely confined to the upper 1000 meters of the ocean model. The eddy heat transport is separated into its rotational and divergent components. The rotational component of the eddy heat transport is strong in the western boundary currents, while the divergent component is strongest in the equatorial region and Antarctic Circumpolar Current. In the equatorial region, the eddy heat transport is due to tropical instability waves, while in the western boundary currents and the Antarctic Circumpolar Current the large eddy heat transports arise from the meandering of the currents. Stammer’s method for estimating the eddy heat transport from an eddy diffusivity derived from mixing length arguments, using altimetry data and the climatological temperature field, is tested and fails to reproduce the model’s directly evaluated eddy heat transport in the equatorial regions and the western boundary currents. Possible reasons for the discrepancy are explored. However, in the Antarctic Circumpolar Current region, the model’s eddy heat transport is shown to agree well with his estimate.

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More information

Published date: 2002
Additional Information: Submitted version

Identifiers

Local EPrints ID: 267
URI: http://eprints.soton.ac.uk/id/eprint/267
ISSN: 0022-3670
PURE UUID: 5c767bbf-d6b5-42e1-bc8e-2e097a1c7650

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Date deposited: 22 Jan 2004
Last modified: 19 Nov 2021 16:58

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Contributors

Author: S.R. Jayne
Author: J. Marotzke

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