摘要
Abstract
The main characteristics of the general atmospheric circulation in September 2014 are as follows:There is one polar vortex center in the Northern Hemisphere.In the middle-high latitudes,the circulation presents a six-wave pattern.The subtropical high is almost the same as its climatological mean.Mean-while,monthly mean precipitation amount is 80.7 mm,which is 23.6% more than its climatological mean (6 5 .3 mm).Monthly mean temperature is 1 7 .1℃,which is a little higher than its climatological mean (16.6℃).There were 6 heavy rainfall events in this month.Extreme continuous rainfall events have oc-curred at 113 stations in northeast part of Sichuan Basin,central and south part of Shaanxi,Henan and other places,with extreme continuous precipitation events observed at 96 stations in central and south part of Shaanxi,southwest part of Shanxi,western part of Henan and northeast part of Sichuan.Typhoon“Kalmaegl”and “Fung-wong”have landed in China successively in this month;continuous rainfall process occurred in West China,most part of Huang-Huai Area,southwest part of North China and other places;the drought of Gansu,Shaanxi and Henan in the early time is released.关键词
大气环流/副热带高压/暴雨/热带气旋/极端事件Key words
atmospheric circulation/subtropical high/rainstorm/tropical cyclone/extreme precipitation records分类
天文与地球科学
