Physics
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3709610v&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 9, CiteID L09610
Physics
Oceanography: General: Ocean Observing Systems, Oceanography: Physical: Currents, Oceanography: General: Time Series Experiments (1872, 1988, 3270, 4475), Oceanography: Physical: Western Boundary Currents
Scientific paper
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.
Beal Lisa M.
Biastoch Arne
van Sebille Erik
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