1991-2011年东海黑潮PN断面流结构与季节变化分析

发布时间：2018-04-22 18:04

本文选题：东海 + 黑潮　；参考：《海洋学报》2016年05期

【摘要】：基于日本海洋信息中心提供的东海黑潮PN断面CTD资料,本文采用动力高度法计算了1991-2011年间90个航次的断面流速,并对流场结构、最大流速、流幅和流量进行了统计分析。结果表明:东海黑潮PN断面流场存在单核、双核、多核3种结构;其中单核结构出现的概率为50%,双核结构为39%,多核结构为11%。东海黑潮的流结构存在显著的季节变化:秋季多核结构所占的比重为4个季节最大,平均流核数最多;冬季主要为单核结构,平均流核数最少;夏季和春季则没有明显的倾向性,单核、双核、多核3种结构出现概率相近,平均流核数介于秋季和冬季之间。其次东海黑潮的流量也存在显著的季节变化:冬季与夏季最强,秋季最小,春季居中。最后东海黑潮的最大流速和流幅也存在季节变化:夏季最大,秋季最小,春季和冬季居中。
[Abstract]:Based on the CTD data of the PN section of the Kuroshio in the East China Sea provided by the Japan Ocean Information Center, the cross-section velocity of 90 voyages from 1991 to 2011 was calculated by using the dynamic altitude method, and the flow field structure, maximum velocity, flow amplitude and flow rate were analyzed statistically. The results show that there are three structures in the PN section of the Kuroshio in the East China Sea, in which the probabilities of mononuclear structure, binuclear structure and polynuclear structure are 50, 39 and 11, respectively. The current structure of Kuroshio in the East China Sea has significant seasonal variation: the proportion of multicore structure in autumn is the largest in 4 seasons and the average number of current nuclei is the largest in winter, and the average number of flow nuclei is the least in winter. There is no obvious tendency in summer and spring. The probability of appearance of mononuclear, binuclear and multicore structures is similar, and the average number of current nuclei is between autumn and winter. Secondly, the Kuroshio discharge of the East China Sea also has significant seasonal variation: winter and summer are the strongest, autumn is the smallest, and spring is the middle. Finally, the maximum velocity and current amplitude of the Kuroshio in the East China Sea also show seasonal variations: the summer is the largest, the autumn is the smallest, and the spring and winter are the middle.
【作者单位】：山东科技大学测绘科学与工程学院;国家海洋局第一海洋研究所;
【分类号】：P731.27

【相似文献】