Abstract
Abstract In the Japan/East Sea, energetic high-frequency large-scale barotropic motions are shown to lead to large aliasing errors in satellite altimetry observations. The combined aliasing from several neighboring and crossing tracks produces artificial mesoscale signals in altimeter-mapped products, significantly changing the map interpretation. The alias can be well suppressed by subtracting the large-scale barotropic motions observed by bottom pressure sensors. By using coastal tide gauge data in the Japan/East Sea, about 78% of the alias source variance can be removed, which offers an alternative way to suppress the alias for other time intervals without bottom pressure measurements.
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