气象学报Issue(2)：306-317,12.DOI:10.11676/qxxb2014.016
江淮地区龙卷超级单体风暴及其环境参数分析
Analysis of the tornado supercell storm and its environmental parameters in the Yangtze-Huaihe region
摘要
Abstract
Based on the Doppler radar detection data and the NCEP reanalysis data,6 tornado supercell storms in the Yangtze-Huaihe region from 2003 to 2010 and their environmental parameters were analyzed.The results show that:(1)H BASE average of the tornado supercell storms was 1.7 km,H TOP average was 9.1 km.The height of maximum reflectance factor was mostly in the lower part of the storm,close to somewhere quarter to its base.H BASE average was much lower than the mean averaged over all the supercell storms of the Yangtze-Huaihe region,but H TOP average was slightly lower.(2 )I VIL average was 25.6 kg/m2 ,and Z MX average was 54.8 dBz.I VIL average was much smaller than the mean averaged over all supercell storms of the Yangtze-Huaihe region,but Z MX average was slightly lower.(3 )MBASE average of the tornado supercell storms was 1.2 km,MTOP average was 3.9 km,and MSHR average was 14.4×10 -3 s-1 .Compared to the average for the Yangtze-Huaihe region,tornado MBASE and MTOP were obviously lower,but MSHR was slightly lower.(4)When TVS (Tornado Vortex Signa-ture)parameters got the maximum value,V AD was between 12 and 45 m/s,theV LLD was greater than 30 m/s,V MXD was larger than 30 m/s,the hight ofV MXD was not lower than 0.8 km,T DPT was between 2.4 and 6.4 km,the T BASE was between 0.7 and 1.5 km,TTOP was between 2.3 and 6.4 km,and T MXSHR exceeded 22×10 -3 s-1 .The maximum parameter occurrence time of TVS agreed with the actual time.On average,tornado appeared within 6 min after TVS appeared.And,(5)0-6 km vertical wind shear of the tornado supercell storm as detected by the radar was 15.2 percent higher than the averaged value over the Yangtze-Huaihe region.I CAPE average was 1752 J/kg,K index was 38℃,wind shear average from 850 hPa to the ground ex-ceeded 12 m/s,and,the temperature difference from 850 to 500 hPa was 23.7℃ before tornado happened.The energy was on a moderate to strong condition,the instability of the atmosphere was higher,and vertical wind shear became larger.关键词
龙卷/超级单体风暴/中气旋/TVS/环境参数Key words
Tornado/Supercell storm/Mesocyclone/TVS/Environmental parameter分类
天文与地球科学引用本文复制引用
周后福,刁秀广,夏文梅,王德育,项阳..江淮地区龙卷超级单体风暴及其环境参数分析[J].气象学报,2014,(2):306-317,12.基金项目
国家自然科学基金项目（41140036、40475017）。 （）
