Sea Surface Height and its Variation from ERS-1 Altimeter Data

概要

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ERS-1 altimeter data taken from April 1992 to February 1993 have been processed to study mean sea surface height and its variation. The global mean sea surface height (MSSH) was obtained by averaging altimeter data of ocean products (OPR-02) of nine repeat cycles. The sea level variability was estimated from the 10-month MSSH data. It clearly shows the regions of large variability which correspond well to the strong ocean currents such as the Kuroshio, its extension, the Gulf Stream and the Agulhas current etc. Sea level anomalies derived from ERS-1 altimeter data in the Kuroshio region are compared with the sea truth data obtained by the Hydrographic Department of Japan. Warm and cold eddies are well expressed by sea level anomalies. Ocean current of the Kuroshio extension can also be estimated. Mean altimeter profiles in the Northwest Pacific region were fitted based on crossover differences, resulting in a 7.9 cm RMS crossover difference.
海洋調査技術学会の論文