中国近海海面风场的时空特征分析  

Analysis of temporal and spatial feature of sea surface wind field in China offshore

作　　者：陈心一[1,2] 郝增周[1,2] 潘德炉[1,2] 黄思训[3] 龚芳[1,2] 施东升 

机构地区：[1]卫星海洋环境动力学国家重点实验室,浙江杭州310012 [2]国家海洋局第二海洋研究所,浙江杭州310012 [3]解放军理工大学气象海洋学院,江苏南京211101 [4]吕四海洋环境监测站,江苏南通226241

出　　处：《海洋学研究》2014年第1期1-10,共10页Journal of Marine Sciences

基　　金：国家重点基础研究发展计划项目资助(2012BAH32B01);中法海洋卫星项目资助(CFOSAT project)

摘　　要：本文利用1987年9月—2013年9月连续26a的多源卫星融合数据,用经验正交函数方法 (EOF)分析中国近海海面风场变化特征。分析结果指出中国近海海面风场的第一模态占总方差贡献的63.94%,呈现为冬-夏季风振荡类型,揭示了中国近海风场的季节变化特征;第二模态占总方差贡献的12.35%,呈现为春-秋振荡类型,反映了冬季风和夏季风过渡时期的变化特征;第三模态占总方差贡献的3.49%,呈现出近似半年周期的波动,体现了中国近海风场季节内变化的特征。Four seasonal average sea surface wind field of China offshore was obtained through ERA-Interim data from ECMWF（European Centre for Medium-Range Weather Forecasts）, so that the feature of seasonal wind field variation of China offshore was figured. The result shows that China offshore is a typical East Asian monsoon region where northerly monsoon is in vogue in winter and southerly monsoon is in vogue in summer. Then the feature of China offshore＇s sea surface wind field anomalies was analyzed with the method of empirical orthogonal function （EOF）. The merging data of multiple satellites utilized in this study is from NCDC（National Climatic Data Center）, which has been collected since Sept. 1987. Some results can be obtained by analyzing 313 monthly average data. The first mode of China offshore＇s sea surface wind field anomalies makes contribution to 63.94% of the total variance. This mode shows the seasonal variations of China offshore, which means that the type of feature is winter-summer monsoon oscillation. The second mode makes contribution to 12.35% of the total variance, which reflects the feature of sea surface wind field during the transition period of winter monsoon and summer monsoon, so it shows the type of spring-autumn oscillation. The third mode, contributed to 3.49% of the total variance, which shows fluctuation with an approximative period of half-year, reflects intraseasonal variation of sea surface wind field variation.

关 键 词：中国近海 多源卫星 海面风场 EOF 

分 类 号：P732.1[天文地球—海洋科学]