Relationship between oceanic heat content and sea surface height on interannual time scale  

作　　者：张林林 孙澈 胡敦欣 

机构地区：[1]Institute of Oceanology,Chinese Academy of Sciences [2]Key Laboratory of Ocean Circulation and Waves,Chinese Academy of Sciences

出　　处：《Chinese Journal of Oceanology and Limnology》2012年第6期1026-1032,共7页中国海洋湖沼学报（英文版）

基　　金：Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-Q11-02);the National Natural Science Foundation of China (Nos. 41006114, 40890151);the National Basic Research Program of China (973 Program) (No. 2012CB417401);the SOA Key Laboratory for Polar Science (No. KP201103)

摘　　要：The relationship between heat content and the interannual time scale is examined with satellite sea surface height （SSH） in the global ocean on altimeter measurements, historical hydrography, and model assimilation outputs. Results show that correlation between altimetric SSH and heat content in the upper 700 m calculated from Ishii data is geographically nonuniform. In the tropical ocean, heat content and SSH are strongly correlated and exhibit nearly the same interannual variations. In the polar ocean, their correlation is relatively weak. Further analysis with Simple Ocean Data Assimilation outputs shows that such nonuniform distribution is not from dynamical origin but from the limited integral depth selected to calculate heat content. The integral depth of 700 m is inadequate to capture variation of the deep main thermocline in the polar region. The halosteric effect also contributes to the nonuniform pattern of correlation, because saline contraction becomes significant in the polar ocean owing to low temperature.The relationship between heat content and sea surface height (SSH) in the global ocean on the interannual time scale is examined with satellite altimeter measurements, historical hydrography, and model assimilation outputs. Results show that correlation between altimetric SSH and heat content in the upper 700 m calculated from Ishii data is geographically nonuniform. In the tropical ocean, heat content and SSH are strongly correlated and exhibit nearly the same interannual variations. In the polar ocean, their correlation is relatively weak. Further analysis with Simple Ocean Data Assimilation outputs shows that such nonuniform distribution is not from dynamical origin but from the limited integral depth selected to calculate heat content. The integral depth of 700m is inadequate to capture variation of the deep main thermocline in the polar region. The halosteric effect also contributes to the nonuniform pattern of correlation, because saline contraction becomes significant in the polar ocean owing to low temperature.

关 键 词：heat content sea surface height （SSH） interannual variation CORRELATION 

分 类 号：P731[天文地球—海洋科学]