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Collinear analysis technique is widely used for determining sea surface variability with Geosat altimeterdata from its Exact Repeat Mission(ERM).But most of the researches have been only on global scaleor in oceans deeper than 2000 m.In shallow shelf waters this method is hampered by the inaccuracy ofocean tide data supplied with Geosat Geophysical Data Records(GDRs).This work uses a modified collinearanalysis technique characterized by simultaneous separation of mean sea level and ocean tide with theleast squares method,to compute sea surface variability in the Northwest Pacific Ocean and eastern ChinaSeas.The mean sea level map obtained contains not ouly bathymetric but also dynamic features such asamphidromes,indicating considerable improvement over previous works.Our sea surface variability mapsshow clearly the main current system,the well-known Zhejiang coastal upwelling,and a northern East Chi-na Sea meso-scale eddy in good agreement with satellite sea surface temperature(SST)observation and his-to
Collinear analysis technique is widely used for determining sea surface variability with Geosynt altimeter data from its Exact Repeat Mission (ERM). But most of the researches have been only on global scale scale in oceans deeper than 2000 m. In shallow shelf waters this method is hampered by the inaccuracy of ocean tide data supplied with Geosat Geophysical Data Records (GDRs). This work uses a modified collinearanalysis method characterized by simultaneous separation of mean sea level and ocean tide with theleast squares method, to compute sea surface variability in the Northwest Pacific Ocean and eastern ChinaSeas.The mean sea level map obtained contains not ouly bathymetric but also dynamic features such asamphidromes, indicating considerable improvement over previous works. Our sea surface variability mapsshow clearly the main current system, the well-known Zhejiang coastal upwelling, and a northern East Chi -na Sea meso-scale eddy in good agreement with satellite sea surface temperature (SST) obs ervation and his-to