摘要
利用常规观测资料,NCAR/GFS的6 h再分析资料、自动站资料和石河子CINRAD/CC多普勒天气雷达观测资料,对2012年6月21日傍晚发生在新疆石河子地区沙漠边缘地带的一次强对流天气进行了综合分析。结果表明:新疆北部至蒙古西部的高空冷涡是此次强对流天气直接影响系统;降雹区上空的辐合上升运动,低层充沛的水汽输送和汇合、大气不稳定层结的出现为冰雹天气出现提供有利条件。弱回波区、超过8 km的50d Bz强回波墙、"逆风区"、垂直液态含水量(VIL)大值区,都对冰雹天气预警有较好的指示意义。
Using data from conventional observation, NCAR/GFS 6h 0.5×0.5 reanalysis,regionalautomatic station and Shihezi Doppler weather radar, a strong convective weather occurred in theevening of June 21 st, 2012 in the Shihezi area at desert edge in Xinjiang was analyzed. The uppercold vortex was from northern Xinjiang to western Mongolia were the direct influence system. Theincreasing convergence and ascending movement, plentiful water vapor concentrating at the lowerlevels of the atmosphere and accumulating in the upper provided advantaged condition for forminghails. The radar echo displayed some typical features such as boundary weak echo region, the radarreflectivity of echo wall was 50 d Bz and its height was higher than 8km,rebellious wind area and thebig value of VIL had a better indicator for warning the hail weather.
出处
《沙漠与绿洲气象》
2015年第6期27-33,共7页
Desert and Oasis Meteorology
基金
新疆气象局气象科技研究项目(MS201524)和(MS201418)共同资助
关键词
沙漠边缘
冰雹
环境场
雷达回波分析
the edge of desert
hail
environment field
radar echo
