Meridional temperature fluxes in the subtropical eastern North Atlantic.

Stramma, Lothar and Isemer, Hans-Jörg (1986) Meridional temperature fluxes in the subtropical eastern North Atlantic. Deep Sea Research Part A. Oceanographic Research Papers, 33 (2). pp. 209-223. DOI 10.1016/0198-0149(86)90119-6.

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Abstract

In a regional study of the eastern North Atlantic Ocean east of 35°W between 41°N and 8°N the mean meridional ocean temperature flux was computed from oceanographic and meteorological measurements using the direct method. In the area of the permanent subtropical gyre between 36°N and 22°N, a southward geostrophic temperature flux dominates. The Ekman temperature flux is weak and changes from a southward flux north of 32°N to a northward flux south of 32°N. In the area of the North Equatorial Current and in the tropics the Ekman temperature flux is comparable in magnitude to the geostrophic temperature flux. Therefore, the total temperature flux changes to a northward direction at 20°N, where the geostrophic transport is still to the south, and becomes large in the tropics, where both components show northward temperature fluxes. The heat flux divergence for the area investigated leads to an ocean heat gain of 0.19 PW.
A comparison of annual mean temperature fluxes with temperature fluxes of east-west CTD sections from the winter half-year shows a small seasonal signal in the geostrophic temperature flux in the subtropical gyre but large differences in the tropics. The seasonal changes for the Ekman temperature fluxes are weak.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/0198-0149(86)90119-6
ISSN: 0198-0149
Date Deposited: 19 Apr 2016 10:34
Last Modified: 22 Sep 2016 12:40
URI: http://oceanrep.geomar.de/id/eprint/32108

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