南半球500hPa月平均场谱物理量的气候特征  

THE CLIMATE FEATURES OF SPECTRAL ELEMENTS OF 500hPa HEIGHT IN THE SOUTHERN HEMISPHERE

作　　者：王梅华[1] 周琴芳 

机构地区：[1]北京气象学院 [2]国家气象局国家气象中心

出　　处：《应用气象学报》1990年第4期443-448,共6页Journal of Applied Meteorological Science

摘　　要：本文利用南半球500hPa 多年(1972年5月至1987年12月)逐月高度场资料,在地转近似条件下,计算了500hPa 高度场的各谱物理量,包括月平均环流场、纬向动能谱、经向动能谱、扰动角动量输送以及扰动动能向平均动能转换率。分析了它们的气候特征,发现谱物理量前3波的分布基本上决定了其总体分布,优势域的位置和强度随季节的变化较显著。In this paper,the various spectral elements of 500 hPa height in the Southern Hemisphere arecalculated using the 500 hPa grid point height from May 1972 to December 1987,including themonthly mean circulation,zonal kinetic spectrum,meridional kinetic spectrum,transport of thedisturbance angular momentum,and the conversion rate from eddy kinetic energy to mean kineticenergy,under the condition of geostrophic approximation.The climate features of the spectral ele-ment are analysed,and it is found that the distribution of the first three waves(n=1,2,3) givesthe fundamental feature of the generaldistribution,and the location and intensity of the extremespots are related to the season.

关 键 词：Pa 地转近似 扰动动能 高度场 特征图 月平均 纬向风 平均场 环流场 大值区 

分 类 号：P4[天文地球—大气科学及气象学]