东亚冬季风指数的分类和比较  

Classification and comparison of east Asian winter monsoon indices

作　　者：邵鹏程[1] 李栋梁[1] 

机构地区：[1]南京信息工程大学气象灾害省部共建教育部重点实验室,南京210044

出　　处：《气象科学》2012年第2期226-235,共10页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(40875059);公益性行业(气象)科研专项(GYHY201006038)

摘　　要：在回顾了2009年以前定义过的冬季风指数的基础上,按照定义要素的不同,进行了分类及序列延长计算,并将现有的冬季风指数分为海陆气压差类(4个)、高压特征类(3个)、风场特征类(9个)、环流特征类(4个)和综合类(2个)。研究了这些冬季风指数的年际及年代际变化趋势及其周期变化,分析了各指数之间的相关性,以及冬季风指数对中国冬季大陆气温变化的指示性。结果表明:东亚冬季风存在缓慢减弱的变化趋势,主要呈现出准6a,准11a和准17a的周期振荡特征。同类别指数之间的相关性要优于不同类别的。东亚冬季风指数与中国冬季大陆气温相关性普遍好的地区主要在河套及内蒙古中部、华南和东南沿海、四川盆地等。Winter monsoon indices defined before 2009 were counted and classified in this paper.They were classified into 5 classes,including land-sea contrast（4 cases）,characteristics of high pressure（3 cases）,characteristics of wind field（9 cases）,characteristics of circulation（4 cases）,and integrated characteristics of winter monsoon system（2 cases）.Then yearly and decadal variation and periodic variation of these indices were analyzed.We also discussed the correlation between these indices and the correlation between winter indices and winter temperature in China.The results show that the east Asian winter monsoon are weakening mainly with a quasi 6 a,11 a,and 17 a periodic oscillations,so that the weakening tends to slow down.The correlations of indices in the same class are better than that in different classes.Areas,in which good correlation between East Asian winter monsoon index and winter temperature exists,belong to the Loop and central Inner Mongolia,south China,southeast coast of China,the Sichuan Basin and so on.

关 键 词：东亚冬季风指数 变化趋势 周期 相关性 冬季气温 

分 类 号：P432[天文地球—大气科学及气象学]