Surface drifter pathways originating in the equatorial Atlantic cold tongue
Surface drifter pathways originating in the equatorial Atlantic cold tongue
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起源于赤道大西洋冷舌的地表漂流路径
DOI：
10.1029/2002gl015788
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发表时间：
2002
影响因子：
5.2
通讯作者：
J. Carton
中科院分区：
文献类型：
--
作者：
S. Grodsky;J. Carton
副热带环流（STC）通过温跃层中的向赤道流动将两半球东副热带的俯冲带与赤道流系统连接起来。其中一些温跃层水在东赤道冷舌中转化为温暖的近地表水，并从那里向极地输出。在这里，我们研究出口途径冷舌在大西洋的基础上最近可用的近地表漂流数据。我们发现，类似于它的太平洋对应，水涌上大西洋冷舌遵循多个途径回到亚热带，但不直接俯冲带。因此，亚热带细胞容易受到亚热带和中纬度海洋的广泛影响并与之交换。
Subtropical cells (STCs) connect subduction zones of the eastern subtropics of both hemispheres to the equatorial current systems via equatorward flow in the thermocline. Some of this thermocline water is converted back into warm near‐surface water in the eastern equatorial cold tongue from whence it is exported poleward. Here we examine the export pathways from the cold tongue in the Atlantic based on recently available near‐surface drifter data. We find that, similar to its Pacific counterpart, water upwelled in the Atlantic cold tongue follows multiple pathways back into the subtropics, but not directly to the subduction zones. Thus the subtropical cells are open to extensive influence from, and exchange with, the subtropical and midlatitude ocean.