东中国海及毗邻海域海面风场季节及年际变化特征分析-海洋预报

东中国海及毗邻海域海面风场季节及年际变化特征分析

单位：1. 总参气象水文局北京 100081;
2. 中国海洋大学山东青岛 266100;
3. 北海舰队海洋水文气象中心山东青岛 266003;
4. 91439部队辽宁大连 116041

分类号：研究与分析

出版年·卷·期（页码）：2010·2010·第二期（30-37）

摘要：

本文基于美国Remote Sensing Systems公司提供的QuickScat海面风场产品,空间分辨率为0.25°×0.25°的月平均资料,进行了两种经验正交函数分解(EOF),以此分析研究中国近海(渤海、黄海、东海)以及台湾以东、以南洋面海面风场的季节变化和年际变化特征。研究发现:(1)季节变化是东中国海海表面风速变化的最主要特征,其变化占总变化方差的70.9%,黑潮的季节变化,通过海气交换影响其流经海域局地风场;(2)东中国海及毗邻海域海表面风速变化与太平洋年际变化以及热带风暴爆发有关,东中国海海表面风速年际变化显著的周期为1.5年和3.1年;(3)东中国海海域近年来整体上海表风速处于增大的趋势中,风速增大最大的区域出现在台湾东侧海域黑潮流经区域,最大增速在0.025m/s/a以上。

Based on QuickScat sea surface wind which is provided from Remote Sensing Systems of the United States,with a spatial resolution of 0.25°× 0.25° on the monthly average,two kinds of EOFs(EOF) analysis were conducted in order to analyze the main characteristics of the seasonal and interannual variability of sea surface wind in the East China Seas(the Bohai Sea,Yellow Sea and East China Sea) and the east of Taiwan.The results show that(1) seasonal changes of the East China Sea surface wind speed is the most important feature,which takes 70.9 percent in the total variance of variability;the seasonal variability in the Kuroshio impact the local sea surface wind by air-sea exchange;(2) the sea surface wind speed changes of East China Sea and it adjacent waters have relationship with the Pacific decadal change,as well as the outbreak of the tropical storm,the East China Sea surface wind speed inter-annual change is in a significant period of 1.5 years and 3.1 years;(3) the trend of sea surface wind speed in the East China Sea area is increasing as a whole in recent years,maximum wind speed increasing area happens in the Kuroshio area where is eastern to Taiwan Island,and the largest increasing is about 0.025m/s/a and even more.

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