Meridional heat transport across the Antarctic Circumpolar Current by the Antarctic Bottom Water overturning cell

Heywood, KJ and Stevens, DP (2007) Meridional heat transport across the Antarctic Circumpolar Current by the Antarctic Bottom Water overturning cell. Geophysical Research Letters, 34 (11). L11610. ISSN 0094-8276

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Abstract

The heat transported by the lower limb of the Southern Ocean meridional overturning circulation is commonly held to be negligible in comparison with that transported by eddies higher in the water column. We use output from one of the first global high resolution models to have a reasonably realistic export of Antarctic Bottom Water, the OCCAM one twelfth degree model. The heat fluxed southward by the deep overturning cell using the annual mean field for 1994 at 56S is 0.033 PW, but the 5-day mean fields give a larger heat flux (0.048 and 0.061 PW depending on calculation method). This is more than 30% of previous estimates of the total heat flux. Eddies and other transients add considerably to the heat flux. These results imply that this component of meridional heat flux may not be negligible as has been supposed.

Item Type: Article
Faculty \ School: Faculty of Science > School of Mathematics
Faculty of Science > School of Environmental Sciences
Related URLs:
Depositing User: David Stevens
Date Deposited: 01 Dec 2010 14:12
Last Modified: 26 Jul 2020 23:29
URI: https://ueaeprints.uea.ac.uk/id/eprint/15916
DOI: 10.1029/2007GL030130

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