Mindanao Current/Undercurrent measured by a subsurface mooring

Mindanao Current/Undercurrent measured by a subsurface mooring
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通过地下系泊装置测量棉兰老岛海流/暗流

DOI:
10.1002/2013jc009693
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发表时间:
2014-06
影响因子:
3.6
通讯作者:
Yuan Dongliang
Yuan Dongliang
中科院分区:
地球科学2区
文献类型:
--
作者:
Zhang Linlin;Hu Dunxin;Hu Shijian;Wang Fan;Wang Fujun;Yuan Dongliang

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通过2010年12月至2012年12月在北纬8度,东经127度3分左右的2年系泊观测,研究了棉兰老岛以东海流的平均结构和变率。在600 m以上存在较强的南向棉兰老海流(MC),在100 m处最大平均流速为73 cm/s,标准差为17 cm/s。在600 m以下至1000 m以上有向北的平均流,称为棉兰老潜流(MUC),在950 m处最大平均流速约为10 cm/s,标准差为19 cm/s。对水文资料和涡流解析模式的进一步分析也表明,这个向北的平均洋流就是MUC。从200米到900米,整个水柱都呈现出60-80天的季节内变化。这种季节内变率似乎与向西转换并在棉兰老岛海岸附近加强的亚温跃层涡旋密切相关。
The mean structure and variability of the currents east of Mindanao are investigated through 2 year mooring observations at about 8 degrees N, 127 degrees 3' E from December 2010 to December 2012. The strong southward Mindanao Current (MC) exists in the upper 600 m with a maximum mean velocity of 73 cm/s and a standard deviation of 17 cm/s at 100 m. A northward mean flow is observed below 600 m to the depth deeper than 1000 m, which has been called the Mindanao Undercurrent (MUC) with a maximum mean velocity of about 10 cm/s at 950 m and a standard deviation of 19 cm/s. Further analysis with hydrographic data and an eddy-resolving model outputs also suggests this northward mean current to be the MUC. Intraseasonal variability with a period of 60-80 days is revealed through the whole water column from 200 m down to about 900 m. This intraseasonal variability appears to be closely related to subthermocline eddies, which translate westward and intensify near the Mindanao coast.
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