The Climatic Character Of Vapor Transportation In East-Asia In Summer And The Relation To The Rainfall Of East China

By using of NCAR/NCEP reanalysis daily average data from 1950 to 2002 and daily rainfall of 355 stations in east China from 1957 to 2000 , whole layer vapor transportation fluxes of all globe are calculated , climatic characters of East-Asia pentadactyl vapor transportation in summer are analysed , differences of pentadactyl vapor transportation in strong vapor transportation years and short ones , and relations of vapor transportation in East-Asia and rainfall in east China. The results reveal that:a) Pentadactyl vapor transportation in East-Asia change with the appearing , strengthening , weakening , and disappearing of the South China Sea monsoon, the Indian monsoon, subtropical high etc..b) Southerly vapor transportation of each longitude areas in East-Asia have different characters in appearance time , speed to north , the place of north bound , speed to south , etc. .And the southeasterly vapor transportation of the subtropical high edge make a detour to south and withdraw to east rapidly, and can touch northwest China during vigorous period .c) Vapor transportation have being weakened gradually from 1950 , especially from the last I960' .Which maked the yearly change of vapor transportation on the earth more obviously than on the ocean , and vapor transportation are reducing in north China and northwest China , and increasing in south China . The changing periods of vapor transportation are 10 years, 16years and 26years.d) In strong vapor transportation years and short ones , it is different that vapor transportation output from the southern hemisphere , the Arabian Sea and the bay of Bengal , vapor transportation intension and extension of the subtropical high edge , the intension of westerly vapor transportation at mid-latitude (40°~45°N) , the area and the center of vapor transportation on...