| 江西强雷电天气形势场及雷达回波特征分析 |
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| 引用本文： | 何文,夏文梅,马中元,钟思奕,段和平.江西强雷电天气形势场及雷达回波特征分析[J].气象科学,2018,38(5):699-706. |
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| 作者姓名： | 何文 夏文梅 马中元 钟思奕 段和平 |
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| 作者单位： | 江西省宜春市气象局, 江西 宜春 336000,江苏省气象科学研究所, 南京 210009,江西省气象科学研究所, 南昌 330000,江西省宜春市气象局, 江西 宜春 336000,江西省气象灾害防御技术中心, 南昌 330000 |
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| 基金项目： | 国家自然科学基金资助项目（41575036）；宜春市气象局自筹资金项目（宜春市气象灾害发生规律技术研究）；宜春市气象局创新团队科研项目（市县级短临预警预报业务平台） |
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| 摘 要： | 利用常规天气资料、地面观测资料、江西WebGIS雷达拼图和雷电监测资料,对2014—2016年江西出现的22次强雷电天气过程进行统计和对比分析。结果表明:江西强雷电天气易出现在赣北北部、南昌附近、上饶地区和吉安西部等区域;强雷电天气出现的环境背景场可分为副热带高压边缘型、副热带高压控制型、低涡切变型和台风外围型,最显著的特征是中高空经常伴有干冷舌侵入低层暖湿区;多项对流指数可以预测出现强雷电天气的可能性;雷达回波和雷电强度关系密切,回波类型以带状和块状为主;雷电强度和雷达回波强度有很好的对应关系,但产生强雷电的回波要具备强度大于50 dBz、强回波中心密实、强回波边缘梯度大等条件。
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| 关 键 词： | 江西 强雷电 天气形势 对流指数 雷达回波 |
| 收稿时间： | 2017/8/17 0:00:00 |
| 修稿时间： | 2017/9/9 0:00:00 |
Characteristics of strong lightning weather situation and radar echo in Jiangxi |
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| HE Wen,XIA Wengmei,MA Zhongyuan,ZHONG Siyi and DUAN Heping.Characteristics of strong lightning weather situation and radar echo in Jiangxi[J].Scientia Meteorologica Sinica,2018,38(5):699-706. |
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| Authors: | HE Wen XIA Wengmei MA Zhongyuan ZHONG Siyi and DUAN Heping |
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| Institution: | Yichun Meteorological Bureau, Jiangxi Yichun 336000, China,Meteorological Science Institute of Jiangsu, Nanjing 210009, China,Jiangxi Meteorological Science Institute, Nanchang 330000, China,Yichun Meteorological Bureau, Jiangxi Yichun 336000, China and JiangxiMeteorological Disaster Defense Technology Center, Nanchang 330000, China |
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| Abstract: | Using the conventional weather data, the conventional ground observation data, Jiangxi WebGis radar composite image and the lighting data, we analyzed 22 strong lighting processes happened in Jiangxi during 2014-2016. The results indicate that strong lighting processes always start in the area of northern Jiangxi, or near Nanchang, or in Shangrao, or western Ji''an. The synoptic background of strong lighting weather presents as near the edge of subtropical high, or under the control of subtropical high, or along with vortex and variant or by typhoon periphery. The most striking feature is that there is dry and cold air at the middle or high level intruding into the wet and warm air at the bottom. Multinomial convection indexes can predict the possibility of strong lighting weather. Radar echo is closely related to lighting intensity, and the echo type is mainly zonal and blocky. The lighting intensity is well corresponding with the radar echo intensity, but conversely not. The radar echo of strong lighting is often over 50dBz, with certain area of central densification, and distribute in the edge of radar echo with big gradient. |
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| Keywords: | Jiangxi Strong lightning Synoptic system Convection index Radar echo |
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