2015—2016年超强厄尔尼诺现象下郴州地区雷暴活动特征分析

Analysis of Thunderstorm Activity in Chenzhou under the Super El Nino Phenomenon from 2015 to 2016

为了分析厄尔尼诺现象下郴州地区雷暴活动的分布特征,以近5年来的雷电定位数据位样本,统计了郴州地区地闪频次的月度变化趋势情况和前/后汛期强对流天气雷暴过程的发展趋势。对比分析了厄尔尼诺现象下2016年前/后汛期郴州地区的雷电流副值概率密度分布情况特征。研究结果表明:此次厄尔尼诺现象对该地区前汛期的雷暴产生较大影响,使前汛期的落雷数大幅增加并超过往年。

In order to analyze the distribution characteristics of thunderstorms in Chenzhou area under the El Nino phenomenon, the monthly trend of the flash frequency in Chenzhou area and the development trend of the severe convective weather thunderstorm process in the pre and post-flood season are summarized with the samples of the lightning location data in the past five years. This paper analyzes the characteristics of the probability distribution of the lightning current amplitude during the pre/post flood season in Chenzhou under the El Nino Phenomenon in 2016. The results show that the El Nino phenomenon has a great impact on the thunderstorms in the pre-flood season, and the thunderstorms in the previous flood season have increased significantly and surpassed that of previous years. The research shows that the El Nino Phenomenon has a great impact on the thunderstorms in pre-flood season and makes a significant increase of the pre-flood season thunderbolt number even and surpassed that of previous years.