Journal of Tropical Oceanography >
Geostrophic transport of the Indonesian Throughflow estimated by using the Argo data
Received date: 2009-04-06
Revised date: 2009-08-05
Online published: 2010-02-05
Supported by
中国科学知识创新工程重要方向项目(印度洋-南海-西太平洋物理海洋学研究);国家重点基础研究规划项目(2007CB411800);国家自然科学基金面上项目(40775054)
The authors estimate the geostrophic velocities and transports between 0 and 1000 m along 114.5 ΟE section, which is located at the exit of the Indonesian Throughflow (ITF), by using the Argo data over 2003-2007. The annual-mean transport based on Argo is 4.2 Sv (1 Sv = 106m3.s-1) between 9.5 Ο-18.5 ΟS, which is 0.5 Sv larger than that based on WOA05 but close to previous estimations along the IX1 section. The seasonal variation of the ITF transport estimated by using the Argo data agrees well with that by WOA05, with the maximum transport of about 10 Sv in July; however, there is a large discrepancy between the two data sets in winter when the transport is small. The authors also investigate the effects of salinity difference and lack of observation to the south of 114.5 ΟE section on the estimation of the ITF transport. They find that better salinity observation can improve the estimation, while the lack of observation to the south of 114.5 ΟE section has little impact on the annual-mean ITF transport. Therefore, Argo data can be used as a valid measurement for estimating the ITF transport, especially its annual-mean amount.
Key words： Argo float; Indonesian Throughflow; geostrophic transport
LIU Xiang-cui , LIU Hai-long , LI Wei , LIN Peng-fei . Geostrophic transport of the Indonesian Throughflow estimated by using the Argo data[J]. Journal of Tropical Oceanography, 2009 , 28(5) : 75 -82 . DOI: 10.11978/j.issn.1009-5470.2009.05.075
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