Drifter-Observed Reversal of the South China Sea Western Boundary Current From Summer to Autumn
Drifter-Observed Reversal of the South China Sea Western Boundary Current From Summer to Autumn
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DOI：
10.4031/mtsj.57.4.6
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发表时间：
2023-12
影响因子：
0.8
通讯作者：
Zhiyuan Hu;Longqi Yang;Zhaozhang Chen;Jia Zhu;Zhenyu Sun;Jianyu Hu
中科院分区：
文献类型：
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作者：
Zhiyuan Hu;Longqi Yang;Zhaozhang Chen;Jia Zhu;Zhenyu Sun;Jianyu Hu
摘要利用北斗卫星跟踪的9条漂移轨迹，结合再分析海流资料和卫星遥感风资料，分析了南海西部边界流的形成、逆转和变化。结果表明：(1)1490016、1490026、1488526、862259、927745号漂流船的最大流速均超过1.5 m/s，其中862259号漂流船在南海西南岸强流区最大流速达到2.3 m/s；(2)夏季南海中部的东北流和9月南海东北部的西流都是秋季南海西南流的主要来源；(3)夏季至秋季南海西南高压的形成、消失和反转主要由季风转变引起；(4)季风的过渡时间是南海南海平均温度年际变化的主要因素。
Abstract This study analyzes the formation, reversal, and variation of the South China Sea Western Boundary Current (SCSWBC) by nine trajectories of Beidousatellite-tracked drifters, combined with reanalysis current data and satellite remote sensing wind data. It is indicated that: (1) the maximum current speeds of Drifters 1490016, 1490026, 1488526, 862259, and 927745 exceed 1.5 m/s, with the speed of Drifter 862259 even reaching 2.3 m/s in the strong current region of the SCSWBC; (2) the SCSWBC in autumn can be sourced from either the northeastward current in the central South China Sea in summer or the westward current in the northeastern South China Sea in September; (3) the monsoon wind transition is attributed for the formation, disappearance, and reversal of the SCSWBC from summer to autumn; and (4) the interannual variation of the SCSWBC mainly depends on the transition time of the monsoon wind.