摘要
利用临夏州国家基准气象探测站1963—2013年逐日雷暴资料,使用气候倾向率、经验频率法等分析法,揭示临夏州雷暴气候特征。结果表明:临夏州年雷暴日数总体呈逐年减少趋势,近50年来减少了约10 d;夏季雷暴出现次数最多,其次为秋季,冬季发生概率很小;雷暴初日呈上升趋势,气候倾向率为2.5 d/10年,50年来推迟了近13 d;雷暴终日呈下降趋势,气候倾向率为-1.9 d/10年,50年来提前了近10 d。4月雷暴初日发生的保证率迅速上升,雷暴终日在10月下旬至11月上旬上升较快,雷暴初、终日之间持续时间总体上呈下降趋势,气候倾向率为-4.2 d/10年,近50年减少了约21 d。
Based on thunderstorm date from 1963 to 2013 in Linxia City,the characteristics of thunderstorm were analyzed by climate trend method and empirical frequeney method. The results showed that thunderstorm day redueed about 10 days in recent 50 years. Thunderstorm day in summer was more than in spring,and less in autumn and winter. In the recent 50 years,the first thunderstorm day delayed 13 days,and the climate tendeney rate was 2.5 days per 10 years ;the last thunderstorm day was 10 days earlier ,and the climate tendency rate was 1.9 days per 10 years.The guarantee rate of the first thunderstorm day in April rapidly and that of the last thunderstorm day increased rapidly in the last ten-day period of Oetober and the first ten-day period of November. The duration of annual thunderstorm days reduced about 21 days in the recent 50 years, and the climate trend rate of-4.2 days oer 10 years.
出处
《现代农业科技》
2016年第20期193-194,共2页
Modern Agricultural Science and Technology
关键词
雷暴
气候特征
趋势
甘肃临夏
thunderstorm
climate characteristics
trend
Linxia Gansu
