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江西灾害性强雷电天气的雷达回波特征

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使用常规地面报表A0资料、多普勒天气雷达资料,以及雷电数据和卫星云图等资料,进行了雷电和雷暴日的分布特征统计分析,重点对灾害性强雷电天气的雷达回波特征进行个例分析,以了解雷电和雷暴天气的活动规律和强雷电的雷达回波特征,提高预警预报的能力.结果表明:(1)雷电和雷暴天气具有明显的季节变化与日变化特征,每年2-5月集中在8-20时,6-9月集中在11-20时;(2)强雷电天气在雷达回波上表现为南北走向的回波带结构,当回波强度≥50dBZ、回波出现不断合并现象、强回波水平尺度较大、具有"指状"或"弓状"回波结构,以及出现陡直"零值线"和VIL超过50 kg/m2时,最易发生强雷电天气;(3)有时局部强单体凭着自身的发展,当强度≥50dBZ和VIL超过50 kg/m2时,也有可能出现局地强雷电天气.
Radar echo characteristics of disastrous strong thunder and lightning weather in Jiangxi
Based on surface report data, Doppler weather radar data, thunder and lightning data and satellite cloud chart, statistical analysis of distributive characters of lightning and thunderstom days was conducted. The emphasis is doing the example analysis of radar echo of disastrous strong lightning weather to understand the activity of lightning and thunderstorm weather and the radar echo characters of strong lightning, improve the capacity of early warning and forecast. The result shows that the lightning and thunderstorm weather possess obvious seasonal and daily variable characters; the strong lightning weather indicates an echo band structure with north-south trend on radar echo; sometimes, local strong echo monomer maybe also implies local strong lighlning weather.

strong thunder and lightningweatherradar echoecho strengthJiangxi Province

马中元、许爱华、陈云辉、辜晓青

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江西省气象科学研究所,江西,南昌,330046

江西省气象台,江西,南昌,330046

强雷电 天气 雷达回波 回波强度 江西省

国家自然科学基金江西省气象局重点科研项目

40865004JXQX2008Z04

2009

自然灾害学报
中国地震局工程力学所 中国灾害防御协会

自然灾害学报

CSTPCDCSCD北大核心
影响因子:0.862
ISSN:1004-4574
年,卷(期):2009.18(5)
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