热带西太平洋海域上层海洋热含量的 CSEOF 分析

doi:10.11978/j.issn.1009-5470.2011.06.037

Abstract

Abstract: The spatial and temporal distribution of the upper (0 - 700 m) ocean heat content (UOHC) over the tropical western Pacific and the probable causes for the variation are studied, using gridded monthly mean Argo profiling dataset from the JMESTC (Japan Marine-Earth Science and Technology Center), zonal wind data, SST data and SSH (Sea Surface Height) data. The research tools include cyclostationary empirical orthogonal function (CSEOF) analysis, Maximum Entropy Method (MEM) and correlation analysis. The main results indicate that the UOHC anomaly of the tropical western Pacific has an east-west anti-phase oscillation and remarkable seasonal and bi-annual variation. Moreover, the UOHC anomaly displayed a sharper “negative-positive-negative” undulation , which had obvious seasonal and inter-annual (~4a) changes. With further analysis, we find that the bi-annual oscillation was highly related to the ENSO (El Nino-Southern Oscillation) events and displayed a lagged response of about 1 - 2 months to the local zonal wind anomaly.

Key words: heat content;spatial and temporal distribution , cyclostationary empirical orthogonal function (CSEOF) , ENSO event;Argo profiling data;tropical western Pacific

CLC Number:

P731

WU Xiao-fen,XU Jian-ping,ZHANG Qi-long,LIU Zeng-hong,. CSEOF analysis of the upper ocean heat content over tropical western Pacific [J].Journal of Tropical Oceanography, 2011, 30(6): 37-46.

References

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CSEOF analysis of the upper ocean heat content over tropical western Pacific

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