冬季南海表层黑潮的入侵形式以及相关风场的影响-海洋预报

冬季南海表层黑潮的入侵形式以及相关风场的影响

单位：中国海洋大学海洋与大气学院, 山东青岛 266100

分类号：P731.27

出版年·卷·期（页码）：2019·36·第四期（60-67）

摘要：

利用业务化海表面温度和海冰分析系统的海表面温度（SST）数据，分析了十年间（2008—2017年）冬季南海的表层黑潮入侵，可将南海表层黑潮的入侵可分为西向入侵型和西北向入侵型两种方式。利用经验正交函数对SST场和海表面风场进行分解，发现可用SST场第二模态时间系数来表征黑潮入侵形式的年际变化趋势，用风场的第二模态时间系数表征风向的变化。通过Ekman流场分析发现吕宋海峡南部海域风向的年际变化与冬季表层黑潮入侵形式的年际变化存在着密切联系，但这个风向的改变并非是影响表层黑潮入侵形式的唯一因素。

The surface Kuroshio intrusion pattern into the South China Sea in winter from 2008 to 2017 is analyzed using the Sea Surface Temperature (SST) data of the Operational Sea Surface Temperature and Sea Ice Analysis System.. The intrusion of the surface Kuroshio into the South China Sea can be divided into the westward intrusion type and the northwestward intrusion type. The empirical orthogonal function is used to decompose the SST field and surface wind field. It is found that the time coefficient of the second mode of the SST field can be used to characterize the inter-annual variation trend of the Kuroshio intrusion pattern, while the time coefficient of the second mode of the sea surface wind field can be used to characterize the change of the wind direction. The Ekman flow field analysis shows that the inter-annual variation of the surface Kuroshio intrusion pattern in winter is closely related to the inter-annual variation of the wind direction in the southern part of the Luzon Strait, which is not the only factor affecting the pattern of surface Kuroshio intrusion.

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