气象研究与应用2025，Vol.46Issue(1)：76-81,6.DOI:10.19849/j.cnki.CN45-1356/P.2025.1.10
登陆广东地区热带气旋演变与闪电活动变化的关系分析
Analysis of the relationship between the evolution of tropical cyclone making landfall in Guangdong and lightning activity changes
摘要
Abstract
Based on the Cloud-to-ground(CG)lighting location data,the tropical cyclone(TC)intensity and track data from Guangdong Typhoon Real-time Release System,the characteristics of lightning activity and its relationship with the evolution of 37 TCs that made landfall in Guangdong from 2006 to 2018 are analysed and studied.The results show that the positive lightning ratio in the TC core area is higher than that in the outer rainband.The TC lightning activity is mainly related to the lightning activity in the outer rainband,and it is not the case that the stronger the TC intensity level,the more active the lightning activity.When a TC is in the Rapid Intensity(RI)stage,the lightning density is the highest in the inner core and the lowest in the outer rainbands,while the opposite is true in the rapid weakening(RW)stage.The comparison of lightning activity intensity in different TC sectors has reference value for the change in TC intensity.The burst of lightning activity in the eyewall before TC landfall,accompanied by intensity enhancement,may herald a continuation of TC intensity deepening or an impending maximum intensity.After TC landfall,the burst of lightning activity in the eyewall indicates a sustained weakening of TC intensity.When a TC is in a stable phase,the eyewall lightning outbursts with high positive flash rates indicate that the TC may have reached its maximum intensity,while no significant change in the TC characteristics is observed when the positive flash rate is low.In addition,the burst of lightning in the eyewall may also foreshadow an impending change in the TC track,at which time the eyewall lightning tends to be distributed in the direction where the TC is about to turn.关键词
热带气旋/闪电/强度变化/路径Key words
tropical cyclone/lightning/intensity change/track分类
大气科学引用本文复制引用
李敏勋,余益君,曾莉茗,赖金毅..登陆广东地区热带气旋演变与闪电活动变化的关系分析[J].气象研究与应用,2025,46(1):76-81,6.基金项目
广东省气象局科学技术研究项目(GRMC2023Q32)、梅州市社会发展科技计划项目(2023C0301010) （GRMC2023Q32）
