中文摘要：

这研究在时期上用南船座漂流数据在印度洋调查表面发行量 19792011。南船座观察表明一些新现象。climatological 年度吝啬的循环证明表面水流在在岸上交西方的印度洋以后变得强壮得多。在热带印度洋，当季风逆行向北方移动，到索马里的东方的大旋转(GW ) 在春天(4 月 5 月) 快速发展，在夏天(JuneSeptember ) 变得最强壮并且消失在秋天(10 月 11 月) 。Agulhas retroflection 的西方结束能到达 18 琠敨浲 ' 覙 H 敮 ????????????????????????????????????? 卓吗？？

英文摘要：

This study investigates the surface circulation in the Indian Ocean using Argos float data over the period 1979--2011. The Argos observations manifest some new phenomena. The climatological annual mean circulation shows that the surface current becomes much stronger after turning around in shore in the western Indian Ocean. In the tropical Indian Ocean, the Great Whirl （GW） to the east of Somalia develops quickly in spring （April-May） as the monsoon reverses to move northward, becoming strongest in summer （June-September） and disappearing in autumn （October-November）. The west end of the Agulhas retroflection can reach 18°E, and it exhibits a seasonal variation. At approximately 90°E, the Agulhas Return Current combines with the eastward South Atlantic Current and finally joins the Antarctic Circumpolar Current.