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Sea surface slope as a proxy for Agulhas Current strength.
van Sebille, Erik, Beal, Lisa M. and Biastoch, Arne (2010) Sea surface slope as a proxy for Agulhas Current strength. Geophysical Research Letters, 37 (9). L09610. DOI 10.1029/2010GL042847.
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Abstract
The linear relation between the strength of the Agulhas Current at nominal latitude 34°S and the gradient in sea level height anomaly across the current is investigated in a 1/10° resolution regional numerical ocean model. Our results show that the strength of the current can be estimated with reasonable accuracy using altimeter data, once it has been calibrated using in-situ transport measurements. Three years of transport measurements provide a calibration with worst-case correlation R = 0.78. In that case the errors in proxy transport have a standard deviation of 9.8 Sv, compared to a 20.2 Sv standard deviation of the transport time series itself. From these results we conclude that the design of the Agulhas Current Timeseries (ACT) experiment, a three-year deployment of moorings across the Agulhas Current and along a TOPEX/Jason altimeter ground track, will likely produce a good quality multi-decadal time series of Agulhas Current strength.
Document Type: | Article |
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Keywords: | Agulhas Current; oceanography; ocean circulation |
Research affiliation: | OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling |
Refereed: | Yes |
Open Access Journal?: | No |
Publisher: | AGU (American Geophysical Union) |
Expeditions/Models/Experiments: | |
Date Deposited: | 22 Nov 2010 10:57 |
Last Modified: | 20 Jun 2017 13:03 |
URI: | https://oceanrep.geomar.de/id/eprint/10053 |
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