用Argo温盐资料估计印度尼西亚贯穿流多年平均地转输送

利用Argo浮标资料，估计了2003—2007年期间印度尼西亚贯穿流（ITF）出口处114.5^οE断面上层(0—1000m)的地转流，并与WOA05资料进行对比。在114.5^οE断面上9.5^ο—18.5^οS之间，依据Argo资料计算的上层(0—1000m)地转流年平均输送为4.2Sv(1 Sv = 106m^3.s^-1)，比依据WOA05资料计算的流量大0.5Sv左右，与前人对IX1断面的估算接近。依据Argo资料计算的ITF的季节变化也与WOA05比较一致，最大输送都出现在7月份，可以达到10Sv，而冬季二者差异较大。比较了盐度资料的差异以及114.5^οE断面南侧缺测对估计ITF地转流输送的影响，发现盐度资料的改善可以改进对ITF地转输送量的估计，而断面南侧的缺测对ITF年平均输送的影响较小。因此，Argo资料可以作为监测ITF输送量的一种有效手段，特别是用于年平均流量的研究。

Geostrophic transport of the Indonesian Throughflow estimated by using the Argo data

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.