基于20a卫星高度计数据的黑潮变异特征

发布时间：2018-05-02 05:21

本文选题：高度计 + 黑潮　；参考：《海洋科学》2016年01期

【摘要】：黑潮作为一支典型的西边界流,其路径变化特征及其相关的物理现象对于渔业和航海有着不可忽视的影响。本文基于改进的特征线方法,利用1992~2012年的高度计绝对动力地形数据提取了整个黑潮流区逐月的黑潮主轴和边界位置,并对沿轴速度、主流宽度、表层水体输运以及路径标准差等黑潮特征量进行了分析研究。结果表明,黑潮整体的沿轴速度在夏秋季较大,最大值可达0.95 m/s,而在冬季的速度较小;黑潮主流宽度在10、11月份达到最大值;黑潮表层水体输运在夏季最大,春秋两季次之,冬季最小。沿黑潮流路分区域对黑潮特征进行分析,结果表明,越往黑潮下游,其沿轴速度、主流宽度和表层水体输运越大,同时沿轴速度和表层水体输运量最大值出现的时间也越晚,黑潮主轴位置相对于其多年平均的偏离程度越大,且随时间波动也越强烈。
[Abstract]:As a typical western boundary current, Kuroshio's path variation characteristics and its related physical phenomena can not be ignored for fishery and navigation. Based on the improved feature line method, the monthly Kuroshio principal axis and boundary position in the whole Kuroshio area are extracted by using the absolute dynamic terrain data of the altimeter from 1992 to 2012, and the axial velocities and the mainstream widths are obtained. The Kuroshio characteristic quantities such as surface water transport and path standard deviation were analyzed and studied. The results show that the axial velocity of Kuroshio is larger in summer and autumn, the maximum value is 0.95 m / s, but the velocity is smaller in winter, the width of Kuroshio reaches its maximum in October and November, and the Kuroshio surface water transport is the largest in summer, followed by spring and autumn. Winter is the smallest. The characteristics of Kuroshio are analyzed along the Kuroshio road. The results show that the axial velocity, the width of the mainstream and the surface water transport increase as the Kuroshio reaches the lower reaches of the Kuroshio, and at the same time the maximum velocity along the axis and the maximum transport volume of the surface water appear later. The deviation degree of the Kuroshio principal axis relative to its annual average is greater and the fluctuation is stronger with time.
【作者单位】：国家海洋局第一海洋研究所;
【基金】：国家863计划项目(2013AA122803) 中欧合作龙计划项目(ID.10466)~~
【分类号】：P731.27;P715.6

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