季风区环流季节变化及其在El　Nino年的异常  

SEASONAL VAEIATION OF CIRCULATION IN THE MONSOON AREA AND ITS ANOMALIES IN EL NINO YEARS

作　　者：王盘兴[1] 徐建军[1] 许应龙 

机构地区：[1]南京气象学院

出　　处：《应用气象学报》1995年第4期407-413,共7页Journal of Applied Meteorological Science

基　　金：国家自然科学基金

摘　　要：该文用ＥＯＦ分析方法研究了１９８１～１９８３年５～９月印度洋、西太平洋季风区环流的季节变化及其年际异常。所得第１特征向量是季风分量。其１９８３年的时间系数曲线与１９８１、１９８２年的差异表明，ＥｌＮｉｎｏ年夏季风环流弱，且其向北半球夏季型的转变期较正常年推迟。在西太平洋地区它表现为副高北进的滞后，用ＩＡＰＧＣＭ作的一个相应的数值试验证实了上述结果的正确。By using the EOF analysis method,the seasonal variation and its anomalies of circulation over the Indian Ocean、West Pacific monsoon area during the period fromMay to Septen1ber,1981～1983 are studied. The first eigenvector field represents themonsoon component.The comparisons of the corresponding time coefficient curve for1983 with those for 1981 and 1982 indicate that the summer monsoon circulation in ElNino years is weak,and the circulation transition from winter monsoon pattern tosummer monsoon pattern is later than the normal, which is reflected by the time lag ofthe seasonal northward shift of the subtropical high over West Pacific.Thecorresponding numerical experiments in terms of the IAP GCM confirm to the aboveresults.

关 键 词：季风区 环流 季节变化 厄尔尼诺 

分 类 号：P434[天文地球—大气科学及气象学] P732.6