| 摘要: |
| 将2003年、2004年和2005年秋、冬季在吕宋海峡投放的卫星跟踪漂流浮标(Argos)资料用于分析黑潮通过吕宋海峡时的流型。结果表明, 秋、冬季黑潮表层流存在3种类型: 北向型、西向型和流套-涡旋型, 后两种入侵南海。统计分析指出吕宋海峡表层流进入流套-涡旋型路径的概率为0.23, 黑潮流套的纬向尺度最大达210km, 仅发生在恒春海脊西侧的台湾岛西南海域。黑潮流套仅是黑潮流分离的一部分, 而非黑潮整体蛇形入侵南海, 这与墨西哥湾的蛇形流不一样。在流套内西向流速大于东向流速, 这可能是流套西向发展的原因之一, 黑潮流套常可演变成脱落涡旋, 也可能就地消亡。脱落涡旋以约10cm/s速度西移。 |
| 关键词: 漂流浮标轨迹 黑潮流套 脱落涡旋 统计分析 吕宋海峡 |
| DOI：10.11693/hyhz201303001001 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助, 41206025 号; 中央级公益性科研院所基本科研业务费, 2012 年项目“中尺度涡旋在西北太平洋与南海水交换过程中的作用及其机制” |
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| KUROSHIO LOOP CURRENT INTRUDING INTO THE SOUTH CHINA SEA AND ITS SHEDDING EDDY |
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GUO Jing-Song1,2, FENG Ying2, YUAN Ye-Li2, GUO Bing-Huo2
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1.Ocean University of China;2.First Institute of Oceanography, State Oceanic Administration
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| Abstract: |
| Observational data of the Argos satellite-tracked drifters deployed in the Luzon Strait (LS) in autumn and winter of 2003, 2004 and 2005 are used to analyze the Kuroshio current pattern passing through the LS. The result show that the surface current paths of Kuroshio in autumn and winter can be classified to three types: northward type, westward type and Loop Current-Shedding Eddy type, and the currents of the letter two are types of intrusion into the South China Sea (SCS). The statistical analysis indicates that the occurring probability of Loop Current-Shedding Eddy type is 0.23. The Kuroshio Loop Current (KLC), with the maximum latitudinal scale of 210km, occurred southwest of the Taiwan Island, and west of the Hengchun Sea Ridge only. KLC is only a part of current separated from the Kuroshio rather than the whole Kuroshio current cruised into the SCS meanderingly, which differs from the Loop Current in the Gulf of Mexico. The westward current velocity was greater than eastward current velocity in the KLC, which is one of the reasons of its developing westward. The KLC may evolve into the Shed Eddy or disappear on the spot. The Shed Eddy moved westward with a speed of about 10cm/s. |
| Key words: drifter trajectory Kuroshio Loop Current shedding eddy statistics analysis Luzon Strait |
