###
DOI:
本文二维码信息
四川盆地雷暴大风雷达回波特征统计分析
龙柯吉1,2, 康岚1, 罗辉1, 郭旭3, 周秋雪1, 费海燕4, 吴薇3, 张琪1
(1.四川省气象台;2.高原与盆地暴雨旱涝灾害四川省重点实验室;3.四川省气象探测数据中心;4.中国气象局气象干部培训学院)
Statistical Analysis of Radar Echo Characteristics of Thunderstorm Gales in Sichuan Basin
LONG Keji1, KANG Lan2, LUO Hui2, GUO Xu3, ZHOU Qiuxue2, FEI Haiyan4, WU Wei3, ZHANG Qi2
(1.The Observatory of Sichuan Province,Chengdu;2.Sichuan Province Meteorological Observatory;3.Sichuan Provincial Meteorological Observation and Data Centre;4.CMA Training Centre (CMATC))
摘要
相似文献
本文已被:浏览 84次   下载 11
投稿时间:2019-02-01    修订日期:2019-12-11
中文摘要: 运用2009~2018年地面、高空、闪电定位、多普勒雷达资料统计出四川盆地的34次雷暴大风过程,并根据冷空气参与情况及500 hPa影响系统将其分为五种类型:混合性大风类(Ⅰ类)、深厚低槽(低涡)后部类雷暴大风(Ⅱ-1)、低槽(切变)东移类雷暴大风(Ⅱ-2)、副高西侧切变类雷暴大风(Ⅱ-3)和东风扰动类雷暴大风(Ⅱ-4)。统计分析了五类过程中发生雷暴大风站点对应的雷达回波特征,包括:对流组织类型、雷达回波强度、回波顶高、垂直液态水含量、中层径向辐合、风暴移动速度、回波质心下降、低仰角风速大值区和辐散。结果表明,82 %的雷暴大风站点具有风速大值区,不同类型的雷暴大风过程还有其他不同的雷达回波特征,这些特征大多可提前10 min以上。另外,当站点出现中层径向辐合、辐散、回波强度大且伴有强梯度或回波类型为飑线时,也要考虑大风是否出现。
Abstract:By using data of surface, upper air, lightning location and Doppler weather radar from 2009 to 2018 in Sichuan Basin,34 cases of thunderstorm gale processes are counted out,on the basis of cold air participation and 500 hPa influence system, these thunderstorm gale processes can be divided to five types: mixed gale (Ⅰ), thunderstorm gale behind deep trough(vortex)(Ⅱ-1),trough (shear)moving eastward thunderstorm gale(Ⅱ-2), shear thunderstorm gale on west side of subtropical high pressure belt(Ⅱ-3),east wind disturbance thunderstorm gale(Ⅱ-4). Radar echo characteristics of thunderstorm gale stations in five kinds of processes are statistical analyzed, include convective organization type, radar echo intensity, echo tops, vertical integrated liquid, mid-altitude radial convergence, storm moving speed, echo centroid decline, high value area of wind speed at low elevation and divergence. The results show that 82 % thunderstorm gale stations have high value area of wind speed, different types of thunderstorm gale have other different warning indicators, all these warning indicators can be advanced by more than 10 minutes. Furthermore, when there are mid-altitude radial convergence, divergence, high echo intensity with strong gradient and the echo type is squall line at station, the strong wind should be considered.
文章编号:201902010056     中图分类号:    文献标志码:
基金项目:国家自然科学基金面上项目(41875058)、中国气象局项目“全国强对流预报专家团队建设”、高原与盆地暴雨旱涝灾害四川省重点实验室青年专项项目(SCQXKJQN2019018)、中国气象局预报员专项项目(CMAYBY2018-064)、中国气象局预报员专项项目(CMAYBY2019-097)、四川强对流预报创新团队(川气函(2017)313号)、国家重点研发计划(2018YFC1506104),四川省科技厅应用基础研究项目(2019YJ0316)
引用文本:
龙柯吉,康岚,罗辉,郭旭,周秋雪,费海燕,吴薇,张琪,0.[en_title][J].Meteor Mon,():-.
LONG Keji,KANG Lan,LUO Hui,GUO Xu,ZHOU Qiuxue,FEI Haiyan,WU Wei,ZHANG Qi,0.Statistical Analysis of Radar Echo Characteristics of Thunderstorm Gales in Sichuan Basin[J].Meteor Mon,():-.