Mean sea level and sea surface variability of northwest pacific ocean and eastern China seas from Geosat altimetry

Chen Ge; He Ming-xia; Masatoshi Akiyama; Yasuhiro Sugimori; Jun Suwa

doi:10.1007/BF02850514

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Mean sea level and sea surface variability of northwest pacific ocean and eastern China seas from Geosat altimetry

Updated：2023-05-16

- Mean sea level and sea surface variability of northwest pacific ocean and eastern China seas from Geosat altimetry
- Journal of Oceanology and Limnology Vol. 12, Issue 2, Pages: 154-164(1994)
- Affiliations：
  
  1. Ocean Remote Sensing Institute
  2. School of Marine Science & Technology Tokai University
- Author bio：
- Funds：
- DOI：10.1007/BF02850514
  CLC：
- Published：1994
- Accepted：
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Ge, C., Ming-xia, H., Akiyama, M. et al. Mean sea level and sea surface variability of northwest pacific ocean and eastern China seas from Geosat altimetry., Chin. J. Ocean. Limnol. 12, 154–164 (1994). https://doi.org/10.1007/BF02850514
DOI：

Ge, C., Ming-xia, H., Akiyama, M. et al. Mean sea level and sea surface variability of northwest pacific ocean and eastern China seas from Geosat altimetry., Chin. J. Ocean. Limnol. 12, 154–164 (1994). https://doi.org/10.1007/BF02850514 DOI：

摘要

Abstract

Collinear analysis technique is widely used for determining sea surface variability with Geosat altimeter data from its Exact Repeat Mission (ERM). But most of the researches have been only on global scale or 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 collinear analysis technique characterized by simultaneous separation of mean sea level and ocean tide with the least squares method

to compute sea surface variability in the Northwest Pacific Ocean and eastern China Seas. The mean sea level map obtained contains not only bathymetric but also dynamic features such as amphidromes

indicating considerable improvement over previous works. Our sea surface variability maps show clearly the main current system

the well-known Zhejiang coastal upwelling

and a northern East China Sea meso-scale eddy in good agreement with satellite sea surface temperature (SST) observation and historical in situ measurement. These all suggest that meaningful and reliable oceanographic results can still be achieved in shallow shelf waters from Geosat altimetry as long as proper data processing techniques are applied.

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references

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