北印度洋海平面风场的时空特征分析  

ANALYSIS OF THE SPATIAL AND TEMPORAL CHARACTERISTICS OF SEA SURFACE WIND FIELD IN THE NORTH INDIAN OCEAN

作　　者：崔开付 孙即霖[1] 薛锋[3] 

机构地区：[1]中国海洋大学物理海洋实验室和海洋-大气相互作用与气候实验室 [2]南海舰队海洋水文气象中心 [3]92196部队

出　　处：《海洋湖沼通报》2013年第4期34-42,共9页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金重点项目(40930844)资助

摘　　要：利用美国国家海洋大气局(NOAA)发布的NCEP/NCAR再分析全球海平面风场资料,对近53a来的北印度洋海平面风场进行矢量场的EOF分析、功率谱分析、线性趋势分析和相关分析,得出北印度洋海平面风场的时空变化特征。结果表明:(1)北印度洋海平面风场存在显著的年际变化特征,振荡周期为5-6年;(2)北印度洋海平面风场存在显著的线性变化趋势,并且在20世纪80年代前后发生了位相的转变,由偏南风距平转为偏北风距平;(3)全球气候变暖与北印度洋海平面风场的变化密切相关,随着全球变暖,北印度洋海平面风场的偏南风距平减弱,偏北风距平加强。Based on the NCEP/NCAR reanalysis global wind field data released by the U. S. National Oceanic and Atmospheric Administration （NOAA）, the spatial and temporal variation characteristics of wind fields in the North Indian Ocean in recent 53 years were studied by using the methods of EOF a nalysis, power spectrum analysis, linear trend analysis and correlation analysis. The results showed that ： （1） There exists significant inter annual climate variation in the sea surface wind fields and the os cillation period is about 5-6 years. （2） There exists significant linear trend in the sea surface wind field. Around the 1980s, the sea surface wind anomaly has occured a phase change from south wind anomaly to north wind anomaly. （3） Global Warming and the sea surface wind changes in the North Indian O- cean have inseparable relationships. With the global warming, the south wind anomaly has weakened while the north wind anomaly has enhanced.

关 键 词：北印度洋 风场 时空特征 经验正交函数(EOF) 全球变暖 

分 类 号：P47[天文地球—大气科学及气象学] P724.8