冬季500百帕高度场的30—50天振荡的遥相关结构及其演变特征  

THE TELECONNECTION STRUCTURE AND THE EVOLUTION FEATURE OF 30-50 DAY OSCILLATION OF 500HPA HEIGHT FIELD DURING NORTHERN HEMISPHERE WINTER

作　　者：徐建军[1] 林春育[1] 

机构地区：[1]南京大学大气科学系

出　　处：《气象科学》1991年第1期11-20,共10页Journal of the Meteorological Sciences

基　　金：国家自然科学基金;国家气象局季风科研基金联合资助

摘　　要：本文利用1981年和1982年冬季的欧洲中心(ECMWF)网格点带通滤波资料,分析了北半球中高纬度和热带地区500hPa高度场的30—50天周期振荡的遥相关结构及其演变特征。发现30—50天周期振荡的分布,在中高纬度地区与主要的大气活动中心相配合,而在热带与对流活动中心相对应。振荡的相关中心呈多段大弧状的波列结构特征,中低纬振荡通过波列的能量频散联系起来。波列的纬向移动和高度场振荡的位相纬向传播的方向是一致的。With the grid data of winter of 1981-1982 from ECMWF, the teleconncction and evolution feature of 500hPa contour field with 30-50 day time scales over middle-high latitudes and tropical-regions in Northern Hemisphere winter are studied by using the method of bandpass filter. It has been found that, the distribution of 30-50 day period oscillation of the contour field is associated with the principal atmospheric activity centres over middle-high latitudes and corresponding to the convective activity centres, the wavetrain centre has latitude-longitude propagation, and at the same time the propagation direction of wavetrain has interannual change. The zonal propagation direction of height field oscillation is consistent with that of wavetrain.

关 键 词：振荡 遥相关 演变 500hPa高度场 

分 类 号：P351.5[天文地球—空间物理学]