摘要
Abstract
The following are the main characteristics of the general atmospheric circulation in July 2011. There were several polar vortex centers in the Northern Hemisphere.The West Pacific subtropical high is weaker than normal years.In middle-high latitudes of Eurasia,the zonal circulation is prevailing with activities of many short-wave troughs.The monthly mean precipitation is 105.8 mm,and is 8.7%less than normal（115.9 mm）.The monthly mean temperature is 22.1℃,and is 0.7℃higher than normal （21.4℃）.The main weather events in July include seven times of heavy rainfalls.There were 4 tropical cyclones generated but only one landing China.Extreme high temperature weather consecutively occurred in Xinjiang,western Inner Monglia,South of the Yangtze River,South China,Yangtze River,Hanshui Basin,Yangtze River-Huaihe Basin,Yellow River-Huaihe Basin,North China,etc.关键词
副热带高压/暴雨/高温/热带气旋/大气环流Key words
subtropical high/rainstorm/high temperature/tropical cyclone/atmospheric circulation分类
天文与地球科学
