高原气象

高原气象 >

2015 , Vol. 34 >Issue 5: 1452 - 1464

DOI: https://doi.org/10.7522/j.issn.1000-0534.2014.00099

论文

一次阵风锋触发强对流过程雷达资料特征分析

  • 胡文东 ,
  • 杨侃 ,
  • 黄小玉 ,
  • 纪晓玲 ,
  • 穆建华 ,
  • 王敏 ,
  • 杨建玲 ,
  • 郑晓辉
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  • 宁夏气象防灾减灾重点实验室, 银川 750002;2. 宁夏气象台, 银川 750002;3. 宁夏气象科学研究所, 银川 750002;4. 国家气象中心, 北京 100081

收稿日期: 2014-03-11

  网络出版日期: 2015-10-28

基金资助

公益性行业(气象)科研专项(GYHY201206005,GYHY201306002);中国气象局关键技术集成(CMAGJ2013M58,CMAGJ 2014M59);宁夏自然科学基金(NZ11248)

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Analysis on a Severe Convection Triggered by Gust Front in Yinchuan with Radar Data

  • HU Wendong ,
  • YANG Kan ,
  • HUANG Xiaoyu ,
  • JI Xiaoling ,
  • MU Jianhua ,
  • WANG Min ,
  • YANG Jianling ,
  • ZHENG Xiaohui
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  • Ningxia Key Laboratory of Meteorological Disaster Prevention and Mitigation, Yinchuan 750002, China;2. Ningxia Meteorological Office, Yinchuan 750002, China;3. Ningxia Institute of Meteorological Sciences, Yinchuan 750002, China;4. National eteorological Center, Beijing 100081, China

Received date: 2014-03-11

  Online published: 2015-10-28

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摘要

为了进一步探索西北高原干旱区强对流触发机制,提高灾害性天气监测预警能力,以新一代天气雷达探测资料为核心,针对一次阵风锋触发的逆向传播强对流过程,进行了雷达气象学诊断分析。结果表明:(1)天气系统配置为有利的大气环境,CAPE、CIN与LFC均适合强对流的触发与发展,原生对流消亡后产生的3条阵风锋共同作用触发新生强对流。(2)新一代天气雷达能有效监测到阵风锋产生、发展、成熟、汇合、消失以及触发新生对流的过程,揭示了3条阵风锋及下击暴流的细节。(3) 强反射率因子区域快速下沉且强度减退及径向速度模糊,对雷暴大风灾害的预警具有指示意义。(4) 各条阵风锋的长度变化普遍经历快速增长、增幅减缓和趋于减小3个阶段,其宽度变化也具有相似的较强规律性。(5)阵风锋的运动受下垫面特别是城区较强磨擦作用影响显著,存在一定波动。阵风锋合并后,新生对流的增强需要18～30 min的成长期,为准确预警强烈天气提供了宝贵的时间提前量。(6)在天气背景分析基础上,利用雷达资料关注阵风锋初生、发展、运动情况,可望提前1 h左右发现触发新生对流征兆。通过雷达资料可准确掌握阵风锋细致变化、形成近地层急流、下击暴流,以及新生对流的发展,是监测强对流触发与预警的关键手段。

关键词： 阵风锋; 雷暴触发; 强对流; 雷达分析

本文引用格式

胡文东 , 杨侃 , 黄小玉 , 纪晓玲 , 穆建华 , 王敏 , 杨建玲 , 郑晓辉 . 一次阵风锋触发强对流过程雷达资料特征分析[J]. 高原气象, 2015 , 34(5) : 1452 -1464 . DOI: 10.7522/j.issn.1000-0534.2014.00099

Abstract

Based on the data of Yinchuan Doppler Weather Radar (CINRAD) and Automatic Weather Stations, using radar meteorological methods, diagnosis of a retro-propagating storm occurred at 19:00 July 18 2010 is conducted.The results show that: (1) The general configuration of weather systems, CAPE, CIN and LFC values are favorable for severe convection triggering and developing.Three gust fronts converged and triggered new severe convections.(2) The processes of gust fronts genesis, evolution, maturation, collision, decease and new storm-triggering are monitored by CINRAD, and the detail of 3 gust fronts and downburst is revealed.Descending of high reflectivity region and decreasing of the intensity in base reflectivity and high values in radical velocity before the downburst are of importance for disastrous gale warning.(3) All the 3 gust fronts experienced 3 stages of rapid increase, mild growth and turning decrease in length, and there is a similar trend in width.The propagations of gust fronts were affected by underlying surface especially the urban friction and result in velocity fluctuation.After gust fronts collision it took 18-30 min for the triggered convection to evolve into well mature, and so a precious leading time for accurate warning is provided.(4) Based on analysis of weather background, it can be expected to find out the clues to forecast the new convection genesis about 1 hr ahead by monitoring gust fronts changes in detail with radar data.The radar data is the key to trace the gust fronts, surface jet, downburst and triggered storms and it plays a crucial role in severe weather watching.

Key words： Gust front; Storm trigger; Severe convection; Radar analysis

参考文献

[1]王田田,高晓清,高艳红,等.酒泉地区20120604暴雨的诊断分析[J].高原气象,2014,33(2):504-514,doi:10.7522/j.issn.1000-0534.2014.00026.
[2]张之贤,张强,赵庆云,等.陇东南地区短时强降水的雷达回波特征及其降水反演[J].高原气象,2014,332):530-538, doi:10.7522/j.issn.1000-0534.2013.00001.
[3]潘留杰,张宏芳,王楠,等.陕西一次强对流天气过程的中尺度及雷达观测分析[J].高原气象,2013,32(1):278-289,doi:10.7522/j.issn.1000-0534.2013.00027.
[4]李晓霞,尚大成,谌芸,等.甘肃陇南两次不同强度暴雨天气的中尺度特征分析[J].高原气象,2013,32(5):1389-1399,doi:10.7522/j.issn.1000-0534.2012.00130.
[5]李明,高维英,侯建忠,等.一次西南涡东北移对川陕大暴雨影响的分析[J].高原气象,2013,32(1):133-144, doi:10.7522/j.issn.1000-0534.2013.00014.
[6]段海霞,李耀辉,张强,等.西北区域几次暴雨过程中的自组织现象[J].高原气象, 2011,30(4):890-900.
[7]井宇,井喜,屠妮妮,等.黄土高原低值对流有效位能区中β尺度大暴雨综合分析[J].高原气象,2010,29(1):78-89.
[8]井喜,高青云,杨静.两个不同降水量级的MCC对比分析[J].高原气象,2011,30(2):328-338.
[9]纪晓玲,胡文东,马筛艳,等.蒙古冷涡影响下宁夏两次典型冰雹天气对比分析[J].自然灾害学报,2008,17(2):103-109.
[10]胡文东,张智,赵光平.宁夏近代夏季逐时降水资料基本特征分析[J].干旱区资源与环境,2004,18(4):139-143.
[11]Laing A G,Michael Fritsch J.The global population of mesoscale convective complexes [J].Quart J Roy Meteor Soc,1997,123(538):389-405.
[12]Laing A G,Fritsch J M.The large-scale environments of the global populations of mesoscale convective complexes[J].Mon Wea Rev,2000,128(8):2756-2776.
[13]Tucker D F,Crook N A.The generation of a mesoscale convective system from mountain convection [J].Mon Wea Rev,1999,127(6):1259-1273.
[14]Tucker D F,Zentmire K S.On the forecasting of orogenic mesoscale convective complexes[J].Wea Forecasting,1999,14(6):1017-1022.
[15]胡文东,陶林科,杨侃,等.西北干旱区一次阵风锋天气过程分析[J].中国沙漠,2008,28(2):349-356.
[16]纪晓玲,桑建人,马筛艳,等.贺兰山东麓宁夏一次极值暴雨过程分析[J].气象科学,2010,30(3):332-337.
[17]胡文东,李艳春,郑广芬,等.宁夏干旱区强对流降水过程雷达图像纹理特征分析[J].中国沙漠,2007,27(2):331-336.
[18]Klingle D L,Smith D R,Wolfson M M.Gust front characteristics as detected by Doppler radar[J].Mon Wea Rev,1987, 115(5):905-918.
[19]Kingsmill D E.Convection initiation associated with a sea-breeze front,a gust front and their collision[J].Mon Wea Rev,1995,123(10):2913-2933.
[20]Purdom J F W.Some use of high-resolution GOES imaginary in the mesoscale forecasting of convection and its behavior[J].Mon Wea Rev,1976,104:1474-1483.
[21]Wilson J W,Schreiber W E.Initiation of convective storms at radar observed boundary-layer convergence lines[J].Mon Wea Rev,1986,114(12):2516-2536.
[22]Weaver J F,Nelson S P.Multiscale aspects of thunderstorm gust fronts and their effects on subsequent storm development[J].Mon Wea Rev,1982,110(7):707-718.
[23]俞小鼎,张爱民,郑媛媛,等.一次系列下击暴流事件的多普勒天气雷达分析[J].应用气象学报,2006,17(4):385-393.
[24]俞小鼎,周小刚,王秀明.雷暴与强对流临近天气预报技术进展[J].气象学报,2012,70(3):311-337.
[25]俞小鼎,郑媛媛,张爱民,等.安徽一次强烈龙卷的多普勒天气雷达分析[J].高原气象,2006,25(5):914-924.
[26]俞小鼎,王迎春,陈明轩,等.新一代天气雷达与强对流天气预警[J].高原气象,2005,24(3):456-464.
[27]朱敏华,周红根.多普勒天气雷达在阵风锋监测中的应用[J].气象科学,2006,26(1):97-102.
[28]吴芳芳,俞小鼎,王慧,等.一次强降水超级单体风暴多普勒天气雷达特征[J].大气科学学报,2010,33(3):285-298.
[29]Diao X,Zhu J,Liu Z.Analysis of three supercell storms with Doppler weather radar data[J].Acta Meteor Sini,2011,25:211-223.
[30]姚叶青,俞小鼎,张义军,等.一次典型飑线过程多普勒天气雷达资料分析[J].高原气象,2008, 27(2):373-381.
[31]夏文梅,慕熙昱,徐芬,等.南京地区初夏一次阵风锋过程的分析与识别[J].高原气象,2009,28(4):836-845.
[32]刘勇,王楠,刘黎平.陕西两次阵风锋的多普勒雷达和自动气象站资料分析[J].高原气象,2007,26(2):380-387.
[33]夏文梅,慕熙昱,徐琪,等.一次阵风锋过程的数值模拟与分析[J].高原气象,2011,30(4):1087-1095.
[34]Mahoney III W P.Gust front characteristics and the kinematics associated with interacting thunderstorm outflows[J].Mon Wea Rev,1988,116(7):1474-1492.
[35]Wakimoto R M.The life cycle of thunderstorm gust fronts as viewed with Doppler radar and rawinsonde data[J].Mon Wea Rev,1982,110:1060-1082.
[36]王伏村,付有智,李红.一次秋季沙尘暴的诊断和天气雷达观测分析[J].中国沙漠,2008,28(1):170-177.
[37]胡文东,杨侃,纪晓玲,等.一次阵风锋引发的短时暴雨的中小尺度分析[C]//中国气象局预报与网络司.天气预报技术文集.北京:气象出版社,2011:136-140.
[38]姚晨,郑媛媛,张雪晨.长生命史飑线在强、弱对流降水过程中的异同点分析[J].高原气象,2012,31(5):1366-1375.
[39]Bouttier F.The use of profiler data at ECMWF[J].Meteor Z,2001,10(6):497-510.
[40]Benjamin S G,Schwartz B E,Koch S E,et al.The value of wind profiler data in US weather forecasting[J].Bull Amer Meteor Soc,2004,85(12):1871-1886.
[41]Cohen A E,Coniglio M C,Corfidi S F,et al.Discrimination of mesoscale convective system environments using sounding observations[J].Wea Forecasting,2007,22(5):1045-1062.
[42]Johnson R H,Bresch J F.Diagnosed characteristics of precipitation systems over Taiwan during the May-June 1987 TAMEX[J].Mon Wea Rev,1991,119(11):2540-2557.
[43]Yujie P,Kun Z,Yinong P.Single-Doppler radar observations of a high precipitation supercell accompanying the 12 April 2003 severe squall line in Fujian Province[J].Meteor Res,2008,24(1):50-65.
[44]戴建华,陶岚,丁杨,等.一次罕见飑前强降雹超级单体风暴特征分析[J],气象学报,2012,70 (4):609-627.
[45]Doswell III C A.The distinction between large-scale and mesoscale contribution to severe convection:A case study example[J].Wea Forecasting,1987,2(1):3-16.
[46]朱乾根,林锦瑞,寿邵文,等.天气学原理和方法[M].北京:气象出版社,2007:453.
[47]冯建民主编.宁夏天气预报手册[M].北京:气象出版社,2012:166.
[48]Wilson J W,Weckwerth T M,Vivekanandan J,et al.Boundary layer clear-air radar echoes:Origin of echoes and accuracy of derived winds[J].J Atmos Ocean Tech,1994,11(5):1184-1206.
[49]Zrnic D S,Lee J T.Investigation of the detectability and lifetime of gust fronts and other weather hazards to aviation[R].FAA Report No.DOT/FAA/PM-83/33, 58pp.Available from NTIS,Springfield,VA 22151,NTIS No.AD-A141552, 1983.
[50]Fujita T T.Manual of downburst identification for project NIMROD[M].SMRP Research Paper 156,University of Chicago,1978:104.
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