摘要 : Ⅰ. DATA AND COMPUTATIONAL METHOD The objective of this paper is to study the characteristic features of the mean circulation at 200 mb in summer (June through August) based on the NMC (National Meteorological Center, USA) tropica... 展开 Ⅰ. DATA AND COMPUTATIONAL METHOD The objective of this paper is to study the characteristic features of the mean circulation at 200 mb in summer (June through August) based on the NMC (National Meteorological Center, USA) tropical wind data sets for the time period 1968—1980. 收起