| 2017年江西副热带高压边缘雷暴大风回波特征 |
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| 引用本文： | 吴才明,马中元,何文,罗燕,高建平.2017年江西副热带高压边缘雷暴大风回波特征[J].气象科学,2019,39(6):797-809. |
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| 作者姓名： | 吴才明 马中元 何文 罗燕 高建平 |
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| 作者单位： | 江西省上高县气象局, 江西 上高 336400,江西省气象科学研究所, 南昌 330064,江西省宜春市气象局, 江西 宜春 336000,江西省上高县气象局, 江西 上高 336400,江西省上高县气象局, 江西 上高 336400 |
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| 基金项目： | 中国气象局气象关键技术集成与应用项目（CMAGJ2013M74）；中国气象科学研究院开放课题（2012LASW B01）；南京雷达气象与强天气开放基金（BJG201205） |
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| 摘 要： | 利用MICAPS天气资料、WebGIS雷达拼图、自动站、强天气监测和雷电监测等数据,对2017年8月江西副热带高压边缘产生的4次雷暴大风天气过程,采用数据统计、形态特征对比等方法进行分析,结果表明:江西北部回波和南部回波发生辐合运动时,南面回波会发展的更为旺盛,形成飑线回波带。回波的传播方式一方面加快了回波移动速度,另一方面改变了回波的移动方向。副热带高压边缘雷达回波特征主要有两种:一是南北向短带回波,有时会发展为弓状回波;二是强回波单体,超级单体和复合单体回波。带状回波上,雷暴大风分布在回波带前沿,尤其是弓状回波带的头部,雷电分布则在回波带移动方向的后侧;强单体、超级单体和复合单体回波上,雷暴大风和雷电集中在强回波中心附近区域。超级单体回波具有55～60 dBZ块状回波结构,垂直液态水含量VIL达到60 kg·m~(-2);相对风暴速度SRM图上和垂直径向速度RHI_V图上,都具有相邻的正负速度对和达到中等以上中气旋标准。
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| 关 键 词： | 副热带高压边缘 雷暴大风 短时强降水 超级单体中气旋 回波特征 |
| 收稿时间： | 2018/6/29 0:00:00 |
| 修稿时间： | 2018/10/10 0:00:00 |
An analysis on echo characteristics of thunderstorm gale on the edge of subtropical anticyclone in Jiangxi Province in 2017 |
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| WU Caiming,MA Zhongyuan,HE Wen,LUO Yan and GAO Jianping.An analysis on echo characteristics of thunderstorm gale on the edge of subtropical anticyclone in Jiangxi Province in 2017[J].Scientia Meteorologica Sinica,2019,39(6):797-809. |
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| Authors: | WU Caiming MA Zhongyuan HE Wen LUO Yan and GAO Jianping |
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| Institution: | Shanggao Meteorological Bureau, Jiangxi Shanggao 336400, China,Institute of Meteorological Science, Nanchang 330046, China,Yichun Meteorological Bureau, Jiangxi Yichun 336000, China,Shanggao Meteorological Bureau, Jiangxi Shanggao 336400, China and Shanggao Meteorological Bureau, Jiangxi Shanggao 336400, China |
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| Abstract: | Based on the data from MICAPS weather data, Jiangxi WebGIS radar mosaic, automatic station, and strong weather monitoring and lightning monitoring, the four thunderstorm and gale weather processes on the edge of subtropical high in Jiangxi Province in August 2017 were analyzed by means of data statistics and morphological characteristics comparison. When the echo in the north and the echo in the south converge, the southern echo will develop more vigorously, forming a squall line echo band. On one hand, the propagation mode of the echo accelerates the moving speed of the echo, on the other hand, it changes the moving direction of the echo. There are two main characteristics of radar echo on the edge of subtropical high:short-band echo in north-south direction that sometimes develops into bow echo and strong echo monomer, and super monomer and composite monomer echo. On the banded echo, the thunderstorm gale is distributed in the front of the echo band, especially at the head of the bowed echo band, while lightning is distributed at the back of the moving direction of the echo band. Thunderstorm gale and lightning are concentrated in the area near the strong echo center on the echo of strong monomer, super monomer and composite monomer. The supercell echo has a 55-60 dBZ block echo structure with a vertical liquid water content of 60 kg·m-2. The relative storm speed SRM and the vertical radial velocity RHI_V have adjacent positive and negative velocity pairs and meet the medium or above the mesocyclone standard. |
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| Keywords: | Jiangxi subtropical high margin thunderstorm gale short-term heavy rainfall supercell cyclone echo characteristics |
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