Characteristic and Diagnostic Analysis of High Temperature and Drought in Tongren Area in 2009
Using the daily precipitation and mean temperature data at 10 stations of Tongren area in 1961-2009,the daily precipitation and maximum temperature from 10 July to 9 September 2009 and NCEP 2.5°×2.5° reanalysis data,the circulation situation and physics of high temperature and drought in Tongren area from July to September 2009 were studied and discussed.The results show that： （1） the subtropical high over the western Pacific is located westward and relatively strong.（2） The cold air activity center is northward and the subtropical high maintain in 30°N.（3） The vapor transport is weaker to cause precipitation reduce.（4） The air current downward motion was stronger to cause the local temperature rise.（5） The summer water vapor transport zones of Bay of Bengal,south of South sea,East sea and Japan sea and Guizhou,east of Tibetan plateau,Hunan and Jiangxi are obvouis positive departure ,the convection activity is weak.
Tongren areaHigh temperature and droughtSubtropical highWater vapor transportOLR fieldVertical velocity
NETL
NSTL
万方数据
维普
