河南省黄淮气旋暴雨的天气特征及个例诊断  

Weather Characteristics of Huang-huai Cyclone Rainstorm in Henan and Diagnosis of Case

作　　者：梁钰 王新敏 邵宇翔 代佩玲 徐泉丽 

机构地区：[1]河南省气象台,郑州450003 [2]河南省专业气象台,郑州450003 [3]新密市气象局,河南新密452370

出　　处：《气象与环境科学》2010年第1期24-29,共6页Meteorological and Environmental Sciences

摘　　要：通过对1990-2001年6-8月影响河南省的18个黄淮气旋暴雨个例进行统计得知:影响河南省的黄淮气旋暴雨6月最多,7月次之,8月最少。黄淮气旋暴雨产生有两个源地,一个在河南省三花间略偏南一带,另一个在河南省南部和湖北的交界处,气旋的形成与两地向东开口的喇叭口地形有关。黄淮气旋暴雨发生前24-12 h,地面图上影响系统可分为西路冷空气影响型和倒槽顶部发展型两种;高空图上,河南多受高压脊控制,700 hPa影响系统有"人"字型切变和低槽型两种,但与地面影响系统没有直接对应关系。为了进一步揭示黄淮气旋暴雨的发生机理,利用NCEP再分析资料,对2007年7月12-15日黄淮气旋引发的暴雨天气过程进行了诊断分析,结果表明:黄淮气旋暴雨的发生、发展是大气斜压性强烈发展的结果,500 hPa高空急流和700 hPa低涡的移动方向对地面气旋的移动有引导作用。According to the statistics of the eighteen Huang-huai cyclones from June to August between 1990 and 2001, the number of the rainstorm caused by Huang-huai cyclone was the most in June, lower in July, and the lowest in August. There are two source regions of the Huang-huai cyclone; one is located at the south of Sanhuajian of Henan province, and the other located at the border of Hubei and south of Henan. The cyclone formation is related with the trumpet terrain on the east. Making use of routine weather chart and the NCEP reanalysis data, the synoptic model of 24-12 h before Huang-huai cyclone rainstorm was obtained. The impact system in the surface map can be divided into cold air impacttype and inverted trough at the top of the development-type; in the upper-level chart, Henan was controlled by the pressure ridge, impact system in 700 hPa can be divided ＂ people＂ type shear and low trough type, but which are not directly correspond to the ground system. In order to further reveal the mechanism of Huang-huai cyclone rainstorm, the diagnostic analysis was carried out for the Huang-huai cyclone rainstorm from 12th to 15th July in 2007. It was found that the occurrence and development of Huang-huai cyclone were the results of intense development of atmospheric baroelinicity, the upper level jet at 500 hPa and moving direction of low vortex at 700 hPa lead the cyclone to move.

关 键 词：黄淮气旋 产生源地 移动路径 500 hPa急流 700 hPa低涡 暴雨落区 

分 类 号：P458.121.1[天文地球—大气科学及气象学] P447