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《Journal of Arid Meteorology》 2017-04
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Analysis on a Large-range Elevated Thunderstorm Hail Weather Process in Tongren of Guizhou

CHEN Jun;LI Xiaolan;YU Yijun;FANG Biao;TENG Lin;HU Ping;Tongren Meteorological Bureau of Guizhou Province;Yuping Meteorological Station of Guizhou Province;Yinjiang Meteorological Station of Guizhou Province;Jianhe Meteorological Station of Guizhou Province;  
Based on the conventional observation data,precipitation at automatic weather stations,composite reflectivity factor of Doppler radar in Tongren of Guizhou,sounding data in Huaihua radiosonde station of Hu'nan and NCEP reanalysis data with 1° × 1°spatial resolution,a large-range elevated thunderstorm hail weather process at night on 15 April 2016 occurring in Tongren of Guizhou Province was diagnosed and analyzed. Compared with a surface based thunderstorm hail process occurring in Tongren on 2 April 2016,the forecast indexes of hail were explored in Tongren of Guizhou. Results are as follows:(1) The instable stratification with dry air in upper layer and warm air in lower layer and stronger vertical wind shear were beneficial to occurrence of the hail weather process.(2)The intrusion of continuous surface cold and dry air compelled the climbing of warm and humid air along cold pad,and the convergence of shear line on 850 h Pa generated the ascending motion at the boundary layer top,which jointly acted on the boundary layer to trigger strong convection. The characteristics of elevated thunderstorm were obvious. The hail occurred in the north of cold pad and near shear line on 850 h Pa.(3) Multi-cell storms maintained for a long time in Tongren of Guizhou,the strong echo column was dense and deep,and it hanged in sky with high centroid at 6 km height,which was conducive to the formation and development of hail.(4) During the hailfall of the elevated thunderstorm,VIL in hail area mainly ranged from 30 to 45 kg·m-2,the top and bottom heights of strong echo with more than 50 d BZ were 8 km above and 3. 5 km below,respectively. The values of the first two quantities were smaller than those of the surface based thunderstorm hail process on the whole.
【Fund】: “对流温度Tc在铜仁夏季局地热对流降水预报中的应用”(铜气科合QN[2016]07);“基于多普勒雷达速度产品的梵净山区域短时强降水预报预警技术研究”(黔科合[2016]支撑2813);“铜仁冷式和暖式切变型暴雨环流特征及落区分析”(黔气科合QN[2016]09)及“玉屏县农业气候资源时空变化特征分析”(铜气科合[2016]08)共同资助
【CateGory Index】: P458.121.2
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