Subduction of North Pacific Tropical Water and its equatorward pathways as shown by a simulated passive tracer
Subduction of North Pacific Tropical Water and its equatorward pathways as shown by a simulated passive tracer
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模拟被动示踪剂显示的北太平洋热带水的俯冲及其赤道方向的路径
DOI：
10.1002/2016jc012305
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发表时间：
2016
影响因子：
3.6
通讯作者：
Qu Tangdong
中科院分区：
文献类型：
--
作者：
Nie Xunwei;Gao Shan;Wang Fan;Qu Tangdong
本文用模拟被动示踪剂研究了北太平洋热带水（NPTW）的俯冲和向赤道的路径。结果表明，北太平洋俯冲带在20°N ~ 30°N之间的150°E ~ 130°W范围内发生俯冲，但主要俯冲区在其东部。俯冲后，NPTW主体首先在北赤道流中向西传播。然后它分成两个分支。一股在黑潮中到达西边界后向北流动，另一股通过西边界通道（WBP）或内部通道（IP）进入热带太平洋。只有不到一半的输送通过西太平洋边界层最终可以通过赤道潜流到达中太平洋和东太平洋，而其余的则被认为是通过印度尼西亚的洋流流入印度洋。IP被发现在赤道输送的NPTW中发挥了重要作用。到达赤道太平洋的NPTW中约有30%通过IP传输。
The subduction and equatorward pathways of North Pacific Tropical Water (NPTW) are investigated using a simulated passive tracer of the consortium Estimating the Circulation and Climate of the Ocean (ECCO). The results demonstrate that the subduction of NPTW occurs in a large area that extends from about 150°E to 130°W between 20°N and 30°N, but the main subduction region lies in its eastern part. After subduction, the main body of NPTW first spreads westward in the North Equatorial Current. Then it splits into two branches. One flows northward in the Kuroshio upon reaching the western boundary, and the other enters the tropical Pacific either via its western boundary pathway (WBP) or interior pathway (IP). Less than half of the transport through the WBP can eventually reach the central and eastern Pacific by the Equatorial Undercurrent, while the rest is seen to flow into the Indian Ocean by the Indonesian Throughflow. The IP is found to play a significant role in equatorward transport of the NPTW. About 30% of the NPTW that reached the equatorial Pacific is transported through the IP.