冬季高度场主分量与正压能量转换的关系  

THE RELATIONSHIP BETWEEN PRINCIPAL COMPONENTS OF GEOPOTENTIAL HEIGHT AND BAROTROPIC ENERGY CONVERSION IN WINTER

作　　者：王国民[1] 徐建军[2] 

机构地区：[1]南京大学大气科学系,南京210008 [2]南京气象学院气象系,南京210044

出　　处：《应用气象学报》1993年第4期434-439,共6页Journal of Applied Meteorological Science

基　　金：国家自然科学基金

摘　　要：对观测的34年北半球冬季500hPa 月平均位势高度场作了经验正交函数分析,对前5个主分量与正压能量转换过程之间的关系作了统计分析.结果表明基本气流向低频扰动的正压能量转换,有利于主分量结构类型的低频环流异常的产生和维持,这一关系是明确的和显著的.An empirical orthogonal function analysis is performed by using the observed500hPa monthly mean geopotential height field in the northern winter for 34 years,andthen a statistical analysis is made for the relationship between the first five principalcomponents and the barotropic energy conversion process.The results show that it ishelpful to the generation and maintenance of low-frequency circulation anomaliesthroughout the barotropic energy transfer from basic flow into low-frequency distur-bances.

关 键 词：主分量 位势高度 动能转换 气流 

分 类 号：P433.1[天文地球—大气科学及气象学]