摘要
利用2014年闪电定位资料,采用数学统计方法对比分析了青藏高原与云贵高原的闪电频次、闪电强度的逐月变化特征,以及闪电活动的空间分布特征。结果表明:(1)青藏高原与云贵高原闪电频次呈单峰型变化,峰值出现在6月,早于低海拔地区,云贵高原月平均闪电频次比青藏高原多。(2)青藏高原和云贵高原平均正闪强度均大于负闪;闪电强度0~100kA的频次最多。(3)青藏高原与云贵高原闪电活动空间分布均有明显的季节变化,青藏高原闪电多发生在高原的东南部和中部,西北部较少,西南区域发生闪电极少;云贵高原全部区域均有闪电发生。
Based on the lightning location data in 2014,the monthly variation characteristics of lightning frequency,lightning intens-ity and spatial distribution characteristics of lightning activities in Qinghai-Tibet Plateau and Yunnan-Guizhou Plateau were analyzed by mathematical statistics method.The results show that:(1)The lightning frequency of the Qinghai-Tibet Plateau and the Yunnan-Guizhou Plateau shows a unimodal change,and the peak appears in June,earlier than that in the low altitude area.The monthly average lightning frequency in the Yunnan-Guizhou Plateau is more than that in the Qinghai-Tibet Plateau.(2)The average positive flash intensity of Qing-hai-Tibet Plateau and Yunnan-Guizhou Plateau is greater than negative flash.The frequency of the lightning intensity 0~100kA is the most.(3)The spatial distribution of lightning activity in the Qinghai-Tibet Plateau and Yunnan-Guizhou Plateau has obvious seasonal changes.Lightning in the Qinghai-Tibet Plateau occurs mostly in the southeast and central parts of the plateau,less in the northwest and very little in the southwest,while lightning occurred in all areas of Yunnan-Guizhou Plateau.
作者
谢冬
王霄
李平兰
蔡自勇
梁建辉
陈什格
XIE Dong;WANG Xiao;LI Pinglan;CAI Ziyong;LIANG Jianghui;CHEN Shige(Huidong Meteorological Bureau,Huidong 615200,China;Liangshan Meteorological Observation Center,Xichang 615000,China)
出处
《高原山地气象研究》
2022年第S01期82-87,共6页
Plateau and Mountain Meteorology Research
关键词
青藏高原
云贵高原
时间分布
闪电
Yunnan-Guizhou Plateau
Qinghai-Tibet Plateau
Temporal distribution
Lightning
