| 一次苏皖龙卷的多普勒雷达分析及其成因探讨 |
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| 引用本文： | 周后福,郭品文,张建军,贾天山.一次苏皖龙卷的多普勒雷达分析及其成因探讨[J].科技导报(北京),2009,27(7). |
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| 作者姓名： | 周后福 郭品文 张建军 贾天山 |
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| 作者单位： | 周后福,ZHOU Houfu(南京信息工程大学大气科学学院,南京210044;安徽省气象科学研究所,安徽省大气科学与卫星遥感重点实验室,合肥230031);郭品文,GUO Pinwen(南京信息工程大学大气科学学院,南京,210044);张建军,ZHANG Jianjun(安徽省气象科学研究所,安徽省大气科学与卫星遥感重点实验室,合肥230031);贾天山,JIA Tianshan(安徽省滁州市气象台,安徽滁州,239000)
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| 基金项目： | 国家自然科学基全项目，安徽省科技攻关计划，中国气象局新技术推广项目 |
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| 摘 要： | 基于多普勒天气雷达、NCEP再分析资料等资料,分析了基本反射率因子等雷达产品,从天气形势、热力动力条件、急流耦合等方面研究了本次龙卷的成因.结果表明:①最强回波强度达到55～60 dB2,而龙卷发生期间降水不大,基本速度图上出现正负速度对,表现出非常典型的龙卷特征;②龙卷涡旋特征(TVS)较为明显.其出现时间与实际龙卷时间大致相同,而且TVS所反映的龙卷路径与实际路径的方向、长度基本相当;③龙卷发生在梅雨的天气形势下.是由高空前倾槽所引发的.不稳定指标说明龙卷发生前大气处在很不稳定的状态;④在龙卷发生前后.温度平流等值线为鞍形场结构:⑤龙卷发生前低层暧平流明显,200 hPa以上层为冷平流;伴随着最大反射率因子的升高、中气旋质心高度的猛烈抬升和中气旋底高的增加;存在高低空急流的耦合现象.
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| 关 键 词： | 龙卷 多昔勒雷达 路径 |
Doppler Radar Analysis and a Discussion on a Tornado Occurring in Border of Jiangsu and Anhui Provinces |
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| ZHOU Houfu,GUO Pinwen,ZHANG Jianjun,JIA Tianshan .Atmosphere Science College,Nanjing University of Information Science , Technology,Nanjing ,China .Key Laboratory of Atmospheric Science , Satellite Remote Sensing of Anhui Province,Anhui Provincial Institute of Meteorological Science,Hefei ,China .Anhui Chuzhou Meteorological Station,Chuzhou ,Anhui Province,China.Doppler Radar Analysis and a Discussion on a Tornado Occurring in Border of Jiangsu and Anhui Provinces[J].Science & Technology Review,2009,27(7). |
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| Authors: | ZHOU Houfu GUO Pinwen ZHANG Jianjun JIA Tianshan Atmosphere Science College Nanjing University of Information Science Technology Nanjing China Key Laboratory of Atmospheric Science Satellite Remote Sensing of Anhui Province Anhui Provincial Institute of Meteorological Science Hefei China Anhui Chuzhou Meteorological Station Chuzhou Anhui Province China |
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| Institution: | ZHOU Houfu1,2,GUO Pinwen1,ZHANG Jianjun2,JIA Tianshan3 1.Atmosphere Science College,Nanjing University of Information Science , Technology,Nanjing 210044,China 2.Key Laboratory of Atmospheric Science , Satellite Remote Sensing of Anhui Province,Anhui Provincial Institute of Meteorological Science,Hefei 230031,China 3.Anhui Chuzhou Meteorological Station,Chuzhou 239000,Anhui Province,China |
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| Abstract: | Based on Doppler weather radar data and re-analyzed data from NCEP,this paper analyzes radar products for parameters such as basic reflection and a tornado from aspects of weather situation,dynamic and thermal conditions,jet stream coupling.The results include(1)the strongest echo intensity reaches 55~60 dBz without too large amount of rainfall,a pair of positive and negative velocities appears on the map of basic velocity,with very typical features of tornado;(2)Tornadic Vortex Signature(TVS)is relatively ... |
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| Keywords: | TVS |
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