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《Journal of Glaciology and Geocryology》 2018-02
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Characteristics analysis of the cloud-to-ground lightning in Qinghai Province during 2008-2016

TAO Shiyin;CAI Zhongzhou;WANG Min;HU Yan'an;JIN Xin;LUO Shaohui;Qinghai Meteorological Disaster Prevention Technical Center;  
To recognize the characteristics of lightning in Qinghai Province based on the cloud-to-ground lightning data collected from 2008 to 2016,the characteristics of cloud-to-ground lightning were analyzed by statistical approach in this article. It was revealed that there was an increase trend from 2008 to 2016 in Qinghai Plateau,the annual positive lightning ratio had been in between 10. 1% and 19. 8% with an average of 15%,and the percentage in spring and autumn had been higher than that in summer observably. The annual average total cloud-to-ground lightning intensity was 30. 3 kA,including the average of positive lightning intensity of 50. 1 kA and the average of negative lightning intensity of 27. 2 kA. The gradient of cloud-to-ground lightning was 7. 3 kA ·us~(-1) in average,and 7. 8 kA ·us~(-1) for positive lightning and 7. 2 kA ·us~(-1) for negative lightning. The cloud-to-ground lighting frequency during summer(June-August) had been very frequent,accounting for 81%,followed by that in autumn(September-November),accounting for 13. 5%. Daily variation of cloud-to-ground lightning had showed a single peak and single valley. The annual mean maximum cloud-to-lighting density was 10. 4 times per square kilometer per year with an annual maximum positive cloud-to-lighting density of 2. 1 times per square kilometer per year and an annual maximum negative cloud-to-lighting density of 2. 1 times per square kilometer per year. Spatially,the high-value center of total cloud-to-lightning and negative cloud-to-lightning were in Xining,Datong and Huangzhong,while the high-value center of positive cloud-to-lightning was in Maqin and Tongde.
【Fund】: 青海省气象局面上项目“青海省ADTD闪电定位资料的去重复与统计分析”资助
【CateGory Index】: P427.3
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