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A geostrophic empirical mode based on altimetric sea surface height

Science China Earth Sciences 2012年第7期55卷 1193-1205页

作者： ZHANG Lin SUN Che Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

Recent discovery of low-dimensional coherent structure in oceanic currents along with a new merged altimeter product called Absolute Dynamic Topography (ADT) makes it possible to derive subsurface ocean information from satellite remote sensing *** altimetric geostrophic empirical mode (η-gem) is developed in this study by projecting hydrographic transects onto the ADT sea surface height coordinate,based on which the four-dimensional thermohaline and velocity structures of oceanic currents are reconstructed from satellite surface *** the WOCE/SR3 area,the η-gem fields capture more than 95% of the total thermal *** gem-derived flow has equivalent-barotropic structure and represents the velocity profile better than traditional dynamic *** with mooring observations also demonstrates that the η-gem provides good estimates of the deep thermohaline fields.

关键词： η-gem altimetry SSH

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A Geostrophic Empirical Mode Based on Altimetric Sea Surface Height

A Geostrophic Empirical Mode Based on Altimetric Sea Surface...

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中国海洋湖沼学会水文气象分会2011年联合会议

作者： ZHANG Lin,SUN Che Institute of Oceanology,Chinese Academy of Sciences,Qingdao, 266071

Recent discovery of low-dimensional coherent structure in oceanic currents along with a new merged altimeter product called Absolute Dynamic Topography(ADT) makes it possible to derive subsurface ocean information from satellite remote sensing *** altimetric geostrophic empirical mode(η-gem) is developed in this study by projecting hydrographic transects onto the ADT sea surface height coordinate,based on which the four-dimensional thermohaline and velocity structures of oceanic currents are reconstructed from satellite surface observations. In the W0CE/SR3 area,theη-gem fields capture more than 95%of the total thermal *** gem-derived flow has equivalent-barotropic structure and represents the velocity profile better than traditional dynamic *** with mooring observations also demonstrates that theη-gem provides good estimates of the deep thermohaline fields.

关键词： η-gem altimetry SSH

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