成都电场仪资料在雷暴天气过程中的应用分析  

A Case Study of Forewarning with Atmospheric Field Mill for Thunderstorm Weather in Chengdu

作　　者：王小亚 闫景东 纪凡华 韩雪蕾 

机构地区：[1]山东省聊城市气象局,山东聊城252000 [2]山东省冠县气象局,山东冠县252500

出　　处：《农业灾害研究》2017年第4期29-34,共6页Journal of Agricultural Catastrophology

摘　　要：利用大气电场仪资料,结合天气实况对成都地区2009年8月25日和26日的雷暴天气过程进行了综合分析。结果显示,大气电场仪能够在雷电发生前感应云内电荷变化,对雷暴天气的短时预报和预警具有重要意义。大气电场波形发生明显波动时,表明第一次闪电发生。雷暴天气过程开始之前电场几乎为0;开始时大气电场强度以正值为主,脉冲幅度小;雷暴降水过程中电场脉冲频繁,电场极性出现由正到负、由负到正的循环震荡变化,电场强度存在较大极值,电场强度极值与强降水时间一致。单站大气电场仪探测范围有限,将多台大气电场仪组网扩大雷电探测范围,并结合闪电定位系统和雷达回波资料了解闪电发生位置和移动趋势,实现更精确的雷暴预警。By using data of atmospheric electric field and the weather condi- tions, the process of thunderstorm weather in Chengdu area on August 25- 26, 2009 was analyzed. The results showed that the atmospheric electric field instrument could induce the charge change in the cloud before the lightning occurs, which was of great significance to the short-term forecast and early warning of the thunderstorm. Atmospher- ic electric field waveforms fluctuated significantly, indicating that the first lightning occurred. The electric field was almost zero before the start of the thun- derstorm process. At the beginning, the intensity of the atmospheric electric field was mainly positive and the pulse ampli- tude was small. The electric field pulse was frequent and the polarity of the electric field appeared from positive to negative. The electric field strength had a large extreme value, the electric field intensity extreme value was consistent with the strong precipitation time. Single- station atmospheric electric field instru- ment detection range was limited, more than one set of atmospheric electric field instrument to expand the scope of light- ning detection, combined with lightning positioning system and radar echo data to understand the location of lightning and mobile trends, to achieve more accurate thunderstorm warning.

关 键 词：大气电场仪 电场强度 雷暴天气 预警 

分 类 号：P427.3[天文地球—大气科学及气象学]