东海黑潮对台风过境的响应特征

Response of Sea Level Anomaly to Typhoon Around Kuroshio Area

文中调查了"威马逊"台风过境时东海黑潮对台风的响应特征,以海面高度异常(Sea Level Anomaly,SLA)和摩擦深度作为主要研究因子,利用艾克曼风生海流理论,得出了在"威马逊"台风过程中东海黑潮附近海域尤其是宫古海峡处的SLA值和摩擦深度的响应特征,发现了东海黑潮及其周边海域表层流场与海面高度异常值(SLA)之间的对应关系存在明显的季节性变化特征,SLA正负极值区对应的表层流场一般呈现反气旋型分布和气旋型分布,利用这一对应关系可以有效地分析判断在台风过程中东海黑潮及附近海域表层流场的响应特征。其结论对于东海黑潮流域的海洋环境分析和该区域的军事活动都有一定的参考价值。

This study investigates the response characteristics of the Kuroshio in the East China Sea to the typhoon Wilson during its passing through.Sea level anomaly(SLA)is the main factor for analyzing the response characteristics.The response characteristics of the SLA and the friction depth in the Kuroshio area,especially in the Miyako Strait,are obtainecl by using the Ekman wind-induced current theory during the typhoon Wilson's passing through.Thestudy finds that there is seasonal variation in the correspondence between surface currents and sea Level Anomaly(SLA)in the Kuroshio area over the East China Sea.The surface flow corresponding to the SLA positive and negative extreme-value generally presents anti-cyclonic and cyclonic distribution,which can be used to effectively analyze the response characteristics of the surface flow of the Kuroshio in the East China Seaduring the typhoon's passing through.Theconclusions have important reference value for the analysis of the marine environment in the Kuroshio over the East China Sea and the military activities in this area.