Observations of flow variability through the Kerama Gap between the East China Sea and the Northwestern Pacific
Observations of flow variability through the Kerama Gap between the East China Sea and the Northwestern Pacific
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DOI：
10.1002/2013jc008899
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发表时间：
2014-02
影响因子：
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通讯作者：
H. Na;M. Wimbush;Jaehun Park;Hirohiko Nakamura;A. Nishina
中科院分区：
文献类型：
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作者：
H. Na;M. Wimbush;Jaehun Park;Hirohiko Nakamura;A. Nishina
位于琉球岛链中央附近的喀拉马峡是连接东海和西北太平洋的最深的海峡，其基深为1050米。我们从2009年6月到2011年6月测量了克拉玛峡的流量。2年平均输运量为2.0±0.7 Sv，从西北太平洋进入东太平洋；它在东太平洋PN线上贡献了大约11%的平均黑潮运输量。通过喀拉玛峡的输运潮下标准差为3.2 Sv，与pn线黑潮输运的4.0 Sv相当，表明喀拉玛峡输运对东太平洋黑潮输运的时间变异有显著影响。与卫星测量的海面高度图时间序列的比较表明，喀拉马裂口输送的时间变化与来自东部的中尺度涡旋的到来有关：高（低）输送到ECS与喀拉马裂口以南的气旋（反气旋）涡旋的存在有关。
The Kerama Gap, near the middle of the Ryukyu Island chain, is the deepest channel with a sill depth of 1050 m connecting the East China Sea (ECS) to the Northwestern Pacific. We measured the flow through the Kerama Gap from June 2009 to June 2011. The 2 year mean transport, 2.0 ± 0.7 Sv, is into the ECS from the Northwestern Pacific; it contributes about 11% of the mean Kuroshio transport in the ECS at the PN line. Subtidal standard deviation of the transport through the Kerama Gap is 3.2 Sv, comparable to that of the PN-line Kuroshio transport (4.0 Sv), suggesting a significant effect of Kerama Gap transport on temporal variability of the Kuroshio transport in the ECS. Comparison with time series of satellite-measured sea surface height maps reveals that temporal variability of the Kerama Gap transport is related to the arrival of mesoscale eddies from the east: high (low) transport into the ECS is associated with the presence of a cyclonic (anticyclonic) eddy south of the Kerama Gap.