Analysis of temporal and spatial distribution of CG lightning activity and its relationship with terrain features around Jiuxianshan mountain

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-05-20 DOI:10.1016/j.jastp.2025.106546

Biao Zhu , Binbin Lin , Bing Liu , Hengyi Liu

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引用次数: 0

Abstract

The study analyzes the Cloud-to-Ground (CG) lightning location data of the Lightning Monitoring System in Fujian Province from 2015 to 2021. It focuses on examining the temporal and spatial distribution of CG lightning activity within a 20 km radius surrounding the Jiuxianshan meteorological station in a mountainous area. Additionally, it investigates the influence of altitude, slope, and slope aspect on the distribution of CG flash, as well as the characteristics of the current intensity distribution of return stroke. The results indicate a notable difference in the distribution of ±CG flashes. Negative CG lightning activity in the surrounding areas of the meteorological station predominantly concentrates on the northwest and southeast directions of the station, and is most concentrated during the period from 13:00 to 20:00. The distribution of return stroke current intensity exhibits an unimodal pattern, with the intensity mostly distributed within the range of 10–40 kA, accounting for 76.5 %. Among them, the proportion of cases distributed between 10 and 20 kA is the highest, reaching 35.9 %. The analysis considering terrain information reveals a generally positive correlation between the distribution density of negative CG flashes and the slope. The negative CG density is higher on east-facing and southeast-facing slopes.

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酒仙山周边CG闪电活动时空分布及其与地形特征的关系分析

研究分析了2015 - 2021年福建省闪电监测系统的云对地（CG）闪电定位数据。重点研究了酒仙山气象站周围20 km半径范围内CG闪电活动的时空分布。此外，还研究了海拔高度、坡度和坡向对CG闪光分布的影响，以及回冲程电流强度分布的特点。结果表明，±CG闪光的分布有显著差异。气象站周边地区负CG闪电活动主要集中在气象站的西北和东南方向，在13:00 - 20:00时段最为集中。回程行程电流强度呈单峰型分布，强度主要分布在10 ~ 40 kA范围内，占76.5%。其中，分布在10 ~ 20 kA之间的病例比例最高，达到35.9%。考虑地形信息的分析表明，负CG闪光的分布密度与坡度之间普遍呈正相关。负CG密度在朝东和朝东南的斜坡上较高。

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来源期刊

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.