2017年8月江西上高雷暴大风雷达回波特征分析
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摘要
利用江西WebGIS雷达拼图、自动站、强天气监测和MICAPS天气资料,对2017年8月江西上高产生的3次雷暴大风天气过程进行分析,结果表明:588 dagpm线覆盖江西或穿过江西是判断江西被副热带高压控制或处副热带高压边缘的条件,强天气分布在584～588 dagpm线之间。上高雷暴大风雷达回波特征主要有短带回波、强回波单体和超级单体回波结构。带状回波组合反射率CR在50～60 dBz,回波顶高ET在11～18 km,垂直液态水含量VIL在20～40 kg/m~2,垂直剖面RHI上50 dBz以上回波高度在5～6 km以上;超级单体回波组合反射率CR在55～65 dBz,回波顶高ET在18 km,垂直液态水含量VIL在50～60 kg/m~2,垂直剖面RHI上50 dBz强回波超过6～8 km,相对风暴速度SRM图上和垂直径向速度RHI_V图上,具有相邻的正负速度对的中气旋结构。
This study analyzed the three thunderstorms and gale weather processes in Shanggao County of Jiangxi Province l in August 2017 based on Jiangxi Web GIS radar mosaic,automatic station,strong weather monitoring and MICAPS weather data. The results show that: covering or crossing Jiangxi by 588 dagpm line is the condition for judging whether Jiangxi is controlled by subtropical high or located at the edge of subtropical high. Strong weather is distributed between 584 and 588 dagpm lines. The radar echoes of thunderstorm and gale in Shanggao County are mainly short-band echoes,strong echoes and supercell echoes. The banded echo combined reflectivity CR ranges from 50 to 60 dB,the echo top height ET is 11 to 18 km,the vertical liquid water content VIL is 20～40 kg/m~2,and the echo height above 50～60 dBz on the vertical profile RHI is above 5～6 km.Super monomer echo combined reflectivity CR range from 55 to 65 dBz,echo top height ET reach 18 km,vertical liquid water content VIL is 50～60 kg/m~2,and 50 dBz strong echo on vertical section RHI over 6 ～8 km. Relative storm speed SRM diagram and vertical radial speed RHI_V diagram have adjacent mesocyclone structures with positive and negative velocity pairs.
This study analyzed the three thunderstorms and gale weather processes in Shanggao County of Jiangxi Province l in August 2017 based on Jiangxi Web GIS radar mosaic,automatic station,strong weather monitoring and MICAPS weather data. The results show that: covering or crossing Jiangxi by 588 dagpm line is the condition for judging whether Jiangxi is controlled by subtropical high or located at the edge of subtropical high. Strong weather is distributed between 584 and 588 dagpm lines. The radar echoes of thunderstorm and gale in Shanggao County are mainly short-band echoes,strong echoes and supercell echoes. The banded echo combined reflectivity CR ranges from 50 to 60 dB,the echo top height ET is 11 to 18 km,the vertical liquid water content VIL is 20～40 kg/m~2,and the echo height above 50～60 dBz on the vertical profile RHI is above 5～6 km.Super monomer echo combined reflectivity CR range from 55 to 65 dBz,echo top height ET reach 18 km,vertical liquid water content VIL is 50～60 kg/m~2,and 50 dBz strong echo on vertical section RHI over 6 ～8 km. Relative storm speed SRM diagram and vertical radial speed RHI_V diagram have adjacent mesocyclone structures with positive and negative velocity pairs.
引文
[1]马中元,苏俐敏,谌芸,等.一次强飑线及飑前中小尺度系统特征分析[J].气象,2014,40(8):916-929.
[2]曲晓波,王建捷,杨晓霞,等.2009年6月淮河中下游二次飑线过程的对比分析[J].气象,2010,36(7):151-159.
[3]盛日锋,王俊,龚佃利,等.山东一次飑线过程的中尺度分析[J].气象,2009,35(9):91-97.
[4]于庚康,吴海英,曾明剑,等.江苏地区两次强飑线天气过程的特征分析[J].大气科学学报,2013,36(1):47-59.
[5]孙虎林,罗亚丽,张人禾,等.2009年6月3~4日黄淮地区强飑线成熟阶段特征分析[J].大气科学,2011,35(1):105-120.
[6]刘娟,周昌云,曹乃和,等.如皋一次罕见的飑线天气过程[J].气象科学,2010,30(4):564-568.
[7]曹艳华,马中元,叶小峰,等.江西外来飑线的常见卫星云图特征[J].自然灾害学报,2010,19(4):54-59.
[8]张京英,孙成武,王庆华,等.一次飑线大风的多种资料分析和临近预报[J].气象科学,2009,29(1):126-132.
[9]许爱华,马中元,叶小峰.江西种强对流天气形势与云型特征分析[J].气象,2011,37(10):1186-1195.
[10]马中元,许爱华,陈云辉,等.江西灾害性强雷电天气的雷达回波特征[J].自然灾害学报,2009,18(5):16-23.
[11]马中元,张瑛,马晓琳,等.江西对流风暴触发系统与形成机制探讨[J].自然灾害学报,2010,19(3):19-26.
[12]马中元,叶小峰,张瑛,等.江西三类致灾大风天气活动与回波特征分析[J].气象,2011,37(9):1108-1117.
[13]敖泽建.甘南高原“4.15”冰雹天气的多普勒雷达特征分析[J].沙漠与绿洲气象,2017,11(2):27-33.
[14]姚静,井宇,赵强,李萍云.黄土高原一次连续性强对流天气分析[J].沙漠与绿洲气象,2017,11(3):55-64.
[15]肉孜·阿基,阿依谢姆古丽·孜比布拉,艾克代·沙拉木.2014年冬季阿图什2次灾害性大风对比分析[J].沙漠与绿洲气象,2017,11(3):72-78.
[16]李浚河,耿建军,刘璐,等.2013年北京地区一次强对流冰雹天气过程分析[J].沙漠与绿洲气象,2016,10(2):25-30.
[17]苏俐敏,夏文梅,马中元,等.2012年江西宜春四类短时强降水特征分析[J].气象科学,2014,34(6):700-708.
[18]俞小鼎,姚秀萍,熊延南,等.多普勒天气雷达原理与业务应用[M].第一版.北京:气象出版社,2006:116-122.
[2]曲晓波,王建捷,杨晓霞,等.2009年6月淮河中下游二次飑线过程的对比分析[J].气象,2010,36(7):151-159.
[3]盛日锋,王俊,龚佃利,等.山东一次飑线过程的中尺度分析[J].气象,2009,35(9):91-97.
[4]于庚康,吴海英,曾明剑,等.江苏地区两次强飑线天气过程的特征分析[J].大气科学学报,2013,36(1):47-59.
[5]孙虎林,罗亚丽,张人禾,等.2009年6月3~4日黄淮地区强飑线成熟阶段特征分析[J].大气科学,2011,35(1):105-120.
[6]刘娟,周昌云,曹乃和,等.如皋一次罕见的飑线天气过程[J].气象科学,2010,30(4):564-568.
[7]曹艳华,马中元,叶小峰,等.江西外来飑线的常见卫星云图特征[J].自然灾害学报,2010,19(4):54-59.
[8]张京英,孙成武,王庆华,等.一次飑线大风的多种资料分析和临近预报[J].气象科学,2009,29(1):126-132.
[9]许爱华,马中元,叶小峰.江西种强对流天气形势与云型特征分析[J].气象,2011,37(10):1186-1195.
[10]马中元,许爱华,陈云辉,等.江西灾害性强雷电天气的雷达回波特征[J].自然灾害学报,2009,18(5):16-23.
[11]马中元,张瑛,马晓琳,等.江西对流风暴触发系统与形成机制探讨[J].自然灾害学报,2010,19(3):19-26.
[12]马中元,叶小峰,张瑛,等.江西三类致灾大风天气活动与回波特征分析[J].气象,2011,37(9):1108-1117.
[13]敖泽建.甘南高原“4.15”冰雹天气的多普勒雷达特征分析[J].沙漠与绿洲气象,2017,11(2):27-33.
[14]姚静,井宇,赵强,李萍云.黄土高原一次连续性强对流天气分析[J].沙漠与绿洲气象,2017,11(3):55-64.
[15]肉孜·阿基,阿依谢姆古丽·孜比布拉,艾克代·沙拉木.2014年冬季阿图什2次灾害性大风对比分析[J].沙漠与绿洲气象,2017,11(3):72-78.
[16]李浚河,耿建军,刘璐,等.2013年北京地区一次强对流冰雹天气过程分析[J].沙漠与绿洲气象,2016,10(2):25-30.
[17]苏俐敏,夏文梅,马中元,等.2012年江西宜春四类短时强降水特征分析[J].气象科学,2014,34(6):700-708.
[18]俞小鼎,姚秀萍,熊延南,等.多普勒天气雷达原理与业务应用[M].第一版.北京:气象出版社,2006:116-122.