江淮地区夏季环流分型及其云水气候特征

用安徽17个测站2001-2004年夏季地面气象观测资料、美国NCEP/NCAR全球日平均分析场资料和历史天气图,对江淮地区夏季云系、降水、物理量和大尺度大气环流进行了分型.华北低槽型平均云量和降水量最多,该型对大别山和江南影响显著;沿海低槽型出现次数最多(37.4%),平均云量和降水量自北向南增多;副高控制型平均云量和降水量最少,主要出现在江淮地区的西部和淮北;副高外围型出现次数最少(10.5%),平均云量和降水量南少北多;南支低槽平均云量和降水量较多,其对淮河以南影响显著.

Cloud System and Precipitation in Anhui Province in Summer and Circulation Pattern of East Asia

Based on the 17 station data in Anhui Province and NCEP/NCAR reanalysis data and historical weather map from 2001 to 2004,the relationship between cloud system and precipitation in Anhui Province in Summer half year and East Asian Circulation are analyzed.The results are as follows.The most number of the mean cloud fraction and precipitation appear on north China and the effect is marked on the Dabieshan and the Jiangnan.The most number of Southeast coast Trough appear,the mean cloud fraction and the precipitation is increased from north to south.At the very least of mean cloud fraction and precipitation on Subtropical High Control,and appeared on west and north.The very least number of Subtropical High periphery,the mean cloud fraction and preciptation is more on north,is very least on south.The more of mean cloud fraction precipitation appear south China Trough and the effect is marked on south Huaihe.