Abstract
Abstract An attempt is made to determine the three-dimensional ocean circulation from satellite altimeter measurements by assimilating Geosat sea surface height data into an eddy-resolving quasigeostrophic (QG) model of the eastern North Atlantic Ocean. Results are tested against independent information from hydrographic field observations and moored current meter data collected during the Geosat ERM. The comparison supports the concept of inferring aspects of the three-dimensional flow field from sea surface height observations by combining altimetric measurements with the dynamics of ocean circulation models. A Holland-type QG model with open boundaries is set up on a 2000 km × 2000 km domain of the eastern North Atlantic between 25° and 45°N, 32° and 8°W. By using a simple nudging technique, about two years of Geosat altimeter data are assimilated into the model every five days as space–time objective analyses on the model grid. The error information resulting from the analysis is used during the assim...
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