云南省一次局地短时强降水中尺度特征与诊断分析
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摘要
利用常规观测、卫星云图、CINRAD-CC多普勒天气雷达观测、NCEP 1°×1°再分析资料,对2013年云南中东部"5.23"短时强降水过程进行中尺度特征和成因研究,结果表明,该次过程前期全省晴热高温,早晨近地层"干暖盖"有利于不稳定能量积累,夜间700 hPa切变线和低涡南下致使不稳定能量释放,产生强对流天气,强降水期间具有中等强度垂直风切变环境。强降水发生在对流层低层能量舌尖附近。强降水的水汽源地是700 hPa西南气流从孟加拉湾输送的丰富水汽与850 hPa层上偏东风输送的次强水汽中心。
Based on conventional observations,satellite cloud images,CINRAD-CC Doppler weather radar observations and 1 degrees ×1 degrees long NCEP reanalysis data,the mesoscale characteristics and genesis of short-term heavy rainfall in the middle and eastern part of Yunnan Province in "5.23" in 2013 are studied.The results show that:In the early stage of this process,the whole province was hot and sunny,and in the morning,the "dry and warm cap" of the surface strata was conducive to the accumulation of unstable energy,and the 700 hPa shear line and the south of the vortex at night resulted in the release of unstable energy,resulting in strong convective weather.During heavy precipitation,there is a medium intensity vertical wind shear environment.Heavy precipitation occurs near the tip of the lower tropospheric energy tongue.The water vapor source of heavy precipitation is the center of abundant water vapor transported by southwestern flow of 700 hPa from the Bay of Bengal and the secondary strong water vapor transported by easterly wind over the 850 hPa layer.
Based on conventional observations,satellite cloud images,CINRAD-CC Doppler weather radar observations and 1 degrees ×1 degrees long NCEP reanalysis data,the mesoscale characteristics and genesis of short-term heavy rainfall in the middle and eastern part of Yunnan Province in "5.23" in 2013 are studied.The results show that:In the early stage of this process,the whole province was hot and sunny,and in the morning,the "dry and warm cap" of the surface strata was conducive to the accumulation of unstable energy,and the 700 hPa shear line and the south of the vortex at night resulted in the release of unstable energy,resulting in strong convective weather.During heavy precipitation,there is a medium intensity vertical wind shear environment.Heavy precipitation occurs near the tip of the lower tropospheric energy tongue.The water vapor source of heavy precipitation is the center of abundant water vapor transported by southwestern flow of 700 hPa from the Bay of Bengal and the secondary strong water vapor transported by easterly wind over the 850 hPa layer.
引文
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[3]杨舒楠,路屹雄,于超.一次梅雨锋暴雨的中尺度对流系统及低层风场影响分析[J].气象,2017,43(1):21-33.
[4]毛冬艳,曹艳察,朱文剑,等.西南地区短时强降水的气候特征分析[J].气象,2018,44(8):1042-1050.
[5]张强,赵煜飞,范邵华.中国国家级气象台站小时降水数据集研制[J].暴雨灾害,2016,35(2):182-186.
[6]杨康权,卢萍,肖递祥,等.高原低值系统影响下一次极端强降水天气诊断分析[J].高原山地气象研究,2017,37(2):1-7.
[7]宋雯雯,唐钱奎.2006-2015年成都市区域性暴雨统计分析及其大尺度环流背景[J].高原山地气象研究,2017,37(1):19-24.
[8]杨磊,蒋大凯,王瀛,等.“8.16”辽宁特大暴雨多尺度特征分析[J].干旱气象,2017,35(2):267-274.
[9]崔丽曼.河南省雷暴大风气候特征及近年变化趋势分析[J].气象研究与应用,2016,37(3):33.
[10]尤红,肖子牛,王曼,等.2008年“7.02”滇中大暴雨的成因诊断与数值模拟[J].气象,2010,36(11):7-16.
[11]周泓,尤红,李璠,等.2012年初夏滇中首场暴雨过程诊断分析[J].应用气象学报,2013,24(6):741-752.
[12]周泓,杨若文,钟爱华,等.云南省一次切变冷锋型暴雨过程的中尺度对流系统分析[J].气象,2015,41(8):953-963.
[13]李施颖,肖天贵.近35年云贵高原暴雨特征分析[J].高原山地气象研究,2017,36(3):21-26.
[14]马红,曾厅余,刘少荣,等.滇东北2010年7月三次局地暴雨过程诊断分析[J].暴雨灾害,2011,30(1):51-56.
[15]徐八林,刘黎平,王改利,等.低纬高原上中-γ尺度微单体暴雨个例的观测分析[J].高原气象,2010,29(3):778-785.
[16]尹丽云,张腾飞,许迎杰,等.低纬高原中部一次强对流天气过程的多普勒雷达和闪电特征分析[J].高原气象,2010,29(4):1026-1035.