中文摘要：

南船座漂流观察被用来在这份报纸在南方太平洋调查南极中间的水(AAIW ) 的 mesoscale 特征。表面下的 mesoscale 现象被南船座漂流可能在漂流上升降下周期期间摸并且被在垂直温度咸度侧面之间的水平咸度坡度识别，这被显示出。这证明 AAIW 的交通可以伴有富有的 mesoscale 特征。导出 AAIW 的 mesoscale 可变性的空间长度，时间，和繁殖特征， gridded 温度咸度数据集 ENACT/ENSEMBLE 版本 3 构造了在上在原处，在自从 2005 和平的南方的观察被使用。实验模式分解方法被使用从 AAIW 主要住的 26.8 27.4 , 分解平均 isopycnal 的咸度异例，进盆规模和二个 mesoscale 模式。有大概 1 000 km 的长度规模的第一个 mesoscale 模式向将近 50% 解释 AAIW 的 mesoscale 特征的可变性，这被发现。它的向西繁殖速度是更慢的在中间纬度(约 1 cm/s ) 并且更快在低纬度(约 6 cm/s ) ，但是与一在 25 上在纬度乐队增加吗？？

英文摘要：

The Argo float observations are used to investigate the mesoscale characteristics of the Antarctic Intermediate Water （AAIW） in the South Pacific in this paper. It is shown that a subsurface mesoscale phenomenon is probably touched by an Argo float during the float＇s ascent-descent cycles and is identified by the horizontal salinity gradient between the vertical temperature-salinity profiles. This shows that the transportation of the AAIW may be accompanied with the rich mesoscale characteristics. To derive the spatial length, time, and propagation characteristics of the mesoscale variability of the AAIW, the gridded temperature-salinity dataset ENACT/ENSEMBLE Version 3 constructed on the in-situ observations in the South Pacific since 2005 is used. The Empirical Mode Decomposition method is applied to decompose the isopycnal-averaged salinity anomaly from 26.8 cr0-27.4 ao, where the AAIW mainly resides, into the basin scale and two mesoscale modes. It is found that the first mesoscale mode with the length scale on the order of 1 000 km explains nearly 50% variability of the mesoscale characteristics of the AAIW. Its westward-propagation speeds are slower in the mid-latitude （around 1 cm/s） and faster in the low latitude （around 6 cm/s）, but with an increasing in the latitude band on 25~-30~S. The second mesoscale mode is of the length scale on the order of 500 km, explaining about 30% variability of the mesoscale characteristics of the AAIW. Its westward-propagation speed keeps nearly unchanged （around 0.5 cm/s）. These results presented the stronger turbulent motion of the subsurface ocean on the spatial scale, and also described the significant role of Argo program for the better understanding of the deep ocean.