一次缓慢东移的黄河气旋暴雨的诊断分析  

Diagnostic Analysis of Heavy Rain Caused by Eastward Slow-moving Yellow River Cyclone

作　　者：范学峰[1] 王新敏 胡燕平 

机构地区：[1]河南省气象局,郑州450003 [2]河南省气象台,郑州450003 [3]漯河市气象局,河南漯河462300

出　　处：《气象与环境科学》2012年第3期10-16,共7页Meteorological and Environmental Sciences

基　　金：河南省气象局重点科研项目"东亚温带气旋的变化及其对黄淮地区的天气影响"(Z200603)资助

摘　　要：利用NCEP/NCAR再分析资料和常规气象资料,对2001年6月28-29日发生在河南的一次黄河气旋暴雨过程进行了诊断分析。结果表明:黄河气旋的稳定少动是造成这次暴雨的直接原因,高层辐散与中层正涡度平流对黄河气旋形成和发展起了重要作用。这次过程的水汽主要来自副高东南侧的海上,孟加拉湾的水汽也有一定的贡献。暴雨区的中低层对称不稳定的存在,导致上升运动和水汽输送的加强,造成降水的增幅。Based on NCEP/NCAR reanalysis data and routine meteorological data, the heavy rain caused by Yellow River cyclone, which happened from June 28 to 29, 2001 in Henan province is ana- lyzed. The results show that the less moving of Yellow River cyclone is the direct reason of the heavy rain. Upper-level divergence and positive vorticity advection of middle layer play important roles in the formation and development of Yellow River cyclone. Water vapor of this process mainly comes from sea surface located on southeast of subtropical high, which comes from bay of Bengal has a certain contribution. Because of the symmetric instability of middle and low level over heavy rain area, ascending motion and water vapor transport are strengthened, which finally caused the change of precipitation.

关 键 词：黄河气旋 涡度平流 耦合 对称不稳定 

分 类 号：P458.121.1[天文地球—大气科学及气象学]