Absolute geostrophic currents in global tropical oceans  

作　　者：杨丽娜 袁东亮 

机构地区：[1]Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Ocean Circulation and Waves,Chinese Academy of Sciences,Qingdao 266071,China [4]Qingdao Collaborative Innovation Center of Marine Science and Technology,Qingdao 266003,China

出　　处：《Chinese Journal of Oceanology and Limnology》2016年第6期1383-1393,共11页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Basic Research Program of China(973 Program)(No.2012CB956001);the CMA(No.GYHY201306018);the Chinese Academy of Sciences(CAS)(No.XDA11010301);the National Natural Science Foundation of China(Nos.41176019,41421005,U1406401);the State Oceanic Administration(SOA)(No.GASI-03-01-01-05)

摘　　要：A set of absolute geostrophic current(AGC) data for the period January 2004 to December 2012 are calculated using the P-vector method based on monthly gridded Argo profi les in the world tropical oceans. The AGCs agree well with altimeter geostrophic currents, Ocean Surface Current Analysis-Real time currents, and moored current-meter measurements at 10-m depth, based on which the classical Sverdrup circulation theory is evaluated. Calculations have shown that errors of wind stress calculation, AGC transport, and depth ranges of vertical integration cannot explain non-Sverdrup transport, which is mainly in the subtropical western ocean basins and equatorial currents near the Equator in each ocean basin(except the North Indian Ocean, where the circulation is dominated by monsoons). The identifi ed nonSverdrup transport is thereby robust and attributed to the joint effect of baroclinicity and relief of the bottom(JEBAR) and mesoscale eddy nonlinearity.A set of absolute geostrophic current（AGC） data for the period January 2004 to December 2012 are calculated using the P-vector method based on monthly gridded Argo profi les in the world tropical oceans. The AGCs agree well with altimeter geostrophic currents, Ocean Surface Current Analysis-Real time currents, and moored current-meter measurements at 10-m depth, based on which the classical Sverdrup circulation theory is evaluated. Calculations have shown that errors of wind stress calculation, AGC transport, and depth ranges of vertical integration cannot explain non-Sverdrup transport, which is mainly in the subtropical western ocean basins and equatorial currents near the Equator in each ocean basin（except the North Indian Ocean, where the circulation is dominated by monsoons）. The identifi ed nonSverdrup transport is thereby robust and attributed to the joint effect of baroclinicity and relief of the bottom（JEBAR） and mesoscale eddy nonlinearity.

关 键 词：P-vector absolute geostrophic currents world tropical oceans Sverdrup balance 

分 类 号：P731.2[天文地球—海洋科学]