Abstract
Pairs of ERS-2 SAR - Envisat ASAR images taken in 2003-2005 over the same scenes with a time lag about of 30 min were used to compute the surface currents by measuring the image-to-image displacements of features such as natural filamentary slicks, current fronts, internal waves, oil spills. Most of the selected images covered the areas between Hokkaido and Sakhalin and the Northern Japan Sea. They are characterized by complicated surface circulation, sharp thermal gradients and increased biological productivity that is accompanied by appearance of zones with the increased and decreased sea surface roughness. Envisat ASAR images were obtained with VV polarization both in wide swath mode and in narrow swath mode. Computed velocities of the natural slicks, current fronts, oil spills and packets of internal waves ranged between 0 and 1.6 m/s and were in a good agreement with available hydrological information.
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