夏季多年平均及个别年份低层流场的准周期扰动分析

ANALYSIS OF QUASI-PERIODIC DISTURBANCEOF SUMMER LOW-LEVEL FLOWFIELD WITH ECMWF LONG-TERM MEAN AND 1980 DATA

利用ＥＣＭＷＦ的１９８０～１９８６年多年平均及１９８０年的低层纬、经向网格点资料对季内振荡方差进行了分析，给出了多年平均及个别年份流场中季内同期振荡强度的对比特征及其在低纬和中高纬地区的差异。为动力学诊断和理论研究夏季风的年际差异提供线索。

Investigation is performed of the variance of intraseasonal oscillation(ISO ) in theECMWF 1980～1986 averaged and 1980 gridded data of low-level zonal and meridional winds,resulting in their respective ISO vigor features and the differnece between low latitudes and extra-tropics, thus providing an approach to the interannual difference in summer winds in the frame-work of dynamic diagnosis and theoretical research.