海洋科学2024，Vol.48Issue(2)：58-68,11.DOI:10.11759/hykx20221225001
青岛沿海地区雷暴过程闪电始发位置的微物理参量特征分析
Characterization of the microphysical parameters associated with lightning initiation in thunderstorms over the Qingdao coastal area
摘要
Abstract
This study used the observation data of a three-dimensional lightning-pulse location system comprising seven low-frequency magnetic sensors and dual-polarization radar to analyze five lightning events in the Qingdao coastal area from 2019 to 2020 and demonstrate the relationship between microphysical parameters and the initial lightning strike position.The results show that(1)most lightning strikes initially occurred in strong echo regions with composite reflectivity greater than 45 dBz.The distance between the cloud-to-ground lightning arrester could reach approximately 10-30 km.The median of vertically integrated liquid water was 37 kg/m2.(2)At the initial lightning strike position,the radar's horizontal reflectivity was mainly 35-45 dBz.Further,the radar's differential reflectivity was mainly 1.5-2.5 dB,and the correlation coefficient ranged from 0.97 to 0.99.Most lightning strikes were initiated between a thermal layer with temperatures-10℃to 0℃comprising rain,wet graupel,and dry graupel.Some lightning strikes were initiated in the middle and upper parts of the wet graupel region,which gener-ally showed a large value of ZDR.(3)Wet graupel existed in the isothermal layer with temperatures-10℃to 0℃in a supercooled water zone,and the radar's horizontal reflectivity and correlation coefficient were higher.Large-diameter graupel particles were more likely to be produced in the supercooled water zone.With strong up-drafts,large-diameter graupel particles collided with ice crystals that were prone to lightning processes.关键词
三维闪电定位/双偏振雷达/微物理特征/相态识别Key words
lightning 3-D location/polarimetric radar/micro-physical characteristics/hydrometer dentification分类
天文与地球科学引用本文复制引用
张源源,孙豪,王鹏,孟繁辉,刘钊,栾在茂..青岛沿海地区雷暴过程闪电始发位置的微物理参量特征分析[J].海洋科学,2024,48(2):58-68,11.基金项目
2019年度山东省气象局重点项目(2019sdqxz08) （2019sdqxz08）
2021 年度山东省自然科学青年基金(ZR2021QD023) （ZR2021QD023）
国家自然科学基金青年项目(42205078)[2019 Key Research Items,Shandong Meteorological Bureau,No.2019SDQXZ08 （42205078）
2021 Shandong Natural Science Youth Fund,No.ZR2021QD023 （）
National Natural Science Foundation of China(Youth Fund Project),No.42205078] （Youth Fund Project）
