Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (29): 267-262.doi: 10.11924/j.issn.1000-6850.2014-0897

Special Issue: 农业气象

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Analysis on Statistical Characteristics of Thunderstorm in Zhangjiakou

  

  • Received:2014-03-30 Revised:2014-03-30 Accepted:2014-05-27 Online:2014-10-31 Published:2014-10-31

Abstract: In order to understand the climatic characteristics of thunderstorm in Zhangjiakou region and provide scientific basis for the risk assessment and reduction of thunder and lightning disaster, the thunderstorm bservation data from the 14 ground meteorological stations in Zhangjiakou region in 54 years from 1960 to 2013 were statistically analyzed by mathematical statistics, linear fitting, climate trend rate method and so on. The results showed that: most of the counties in this region were in the moderate thunderstorm range, and Yuxian, Huai'an, and Shangyi county, thunderstorm days were more than 40 days, achieved multi-thunderstorm level. The average annual thunderstorm days in most years were between 30.0 and 40.0 days. They were up to the most of 54.4 days in 1990 and down to the least of 28.9 days in 1972. Decadal variations presented the characteristics of reducing-increasing-reducing again. There was an obvious seasonal thunderstorm, most in summer, no in winter. The monthly thunderstorm day in Zhangjiakou region presented a parabolic unimodal change, its peak value appeared in July. The monthly average thunderstorm days of Bashang area were more than that of Baxia area from June to October. Month with most thunderstorm day was July in 14 observation stations in 54 years. Thunderstorms occurred more during the day than at night, and mainly occurred from 13:00 to 16:00 in Bashang area and from 14 to 18:00 in Baxia area. Most thunderstorms maintained for more than 60 minutes in Bashang area and less than 30 minutes in Baxia area. Both the earliest and the latest day of thunderstorm of Bashang area occurred were ahead of that of Baxia, and there was little difference on the average conditions of beginning and ending of thunderstorms and their duration between the two areas.