2次副高西伸北抬连续暴雨过程分析  

Contrast and Analysis of Two Continuous Heavy Rains Processes when Subtropical High Extending West and North

作　　者：郄喜明 邓鹏飞 刘蔚 

机构地区：[1]抚州市气象局,江西抚州344000 [2]临川区气象局,江西抚州344500

出　　处：《江西科学》2014年第4期477-481,共5页Jiangxi Science

摘　　要：利用常规天气图资料,从副高强度及脊线位置、大陆高压强度及脊线位置、西南急流强度及位置变化3个方面,对2009年7月1-4日和2010年6月17-20日,2次发生在江西的区域性连续暴雨、局部大暴雨天气过程进行分析,结果表明:副高脊线位置的变化直接影响暴雨落区;大陆高压东扩及副高减弱东退控制暴雨过程;西南急流强度是影响暴雨强度的重要因素。Mid or late June to early July every year,when subtropical high extending west and north for the first time, high-pressure ridge near 20 degrees north latitude, if with the combination of westerlies weather system, Jiangxi province will appears a regional continuous rainstorm precipitation process with large scale and high strength. The formation mechanism of rainstorm is complex and affected by many elements. This article tried to use the actual routine meteorological data, from the subtropical high strength and ridge line position changes;continental high pressure strength and the change of its ridge line ; the intensity and position change of southwest jet, to contrast and analysis two regional heavy rain process occurred in July 1 to 4,2009 and June 17 to 20,2010 occurred in Jiangxi. Results show that the subtropical high ridge line position change, directly affect the drop zone of heavy rain, continental high atmospheric pressure extending west and weakened subtropical high back east control heavy rain process, southwest jet intensity is the important factors influencing the rainfall intensity.

关 键 词：区域性连续暴雨 副高 大陆高压 西南急流 

分 类 号：P458.121.1[天文地球—大气科学及气象学]