风云四号闪电数据和湖南地区ADTD数据对比分析

Comparative Analysis of FY-4 Lightning Data and ADTD Data in Hunan Province

摘要: 为了比较LMI和ADTD闪电资料之间的相关性和差异，文章基于湖南省2022年ADTD数据和LMI湖南地区2022年闪电数据，对卫星和地基两套探测系统的闪电数据进行对应分析。结果表明：两者数据的匹配比例在月变化曲线上呈现双峰值特征，两者监测到的高频率闪电活动月份基本一致，匹配比例较为稳定的是春季，夏季的匹配度普遍高于春季；两者数据在日变化特征上保持了较好的一致性，呈现出单峰值分布的规律；湖南省云地闪比率值随纬度的变化不明显，平均值为1.96，星地探测数据得出的云地闪比率值与ADTD实测数据计算出的云地闪比率值基本吻合。

Abstract: To compare the correlation and differences between LMI and ADTD lightning data, based on the ADTD data of Hunan Province in 2022 and the lightning data of Hunan Province, the article correspondently analyzes lightning data from satellite and ground-based detection systems. The results indicate that: the matching ratio of the two data shows a bimodal feature on the monthly variation curve, the months of high-frequency lightning activity monitored by both are basically the same, the most stable matching ratio is in spring, the matching degree in summer is generally higher than that in spring; the two data maintain good consistency in daily variation characteristics, showing a pattern of single peak distribution; the variation of cloud to ground flash ratio values with latitude in Hunan Province is not significant, the average value is 1.96, the cloud to ground lightning ratio value obtained from satellite to ground exploration data is basically consistent with the cloud to ground lightning ratio value calculated from ADTD measured data.