黑龙江省雷暴发生规律及区划研究

利用相对频数法、t检验分析、信息扩散理论对黑龙江省1971-2000年80个气象站的雷暴时间、空间分布特征及变化规律进行分析研究,并结合G IS技术制成不同日数的雷暴概率区划图。研究得出：①30年来,黑龙江省雷暴天气总体上在波动中呈减少趋势,1976年、1987年为两突变年;年平均雷暴日数,中部、中南部最多,东部平原地区最少;全年雷暴最多日集中在6-8月,占全年的74%;②全省雷暴发生概率最高值区位于中部和中南部,最低值区位于东部。

Law and Regionalization of Thunderstorms in Heilongjiang Province

Based on the observational data from 80 meteorological stations in the period from 1971 to 2000, the characteristics of temporal and spatial distribution and change law of thunderstorm in Heilongjiang province are analyzed by use of the relative frequency method, t test and analysis and information diffusion theory using. The zoning map of thunderstorm probability of a different number of days is worked out by use of GIS technology. The results show that, in these 30 years, thunderstorms, in general, tended to decrease in the fluctuations in Heilongjiang Province. 1976 and 1987 are the two mutation years. Average annual thunderstorm days are the most in central and south central region and the least in the eastern plain. Most of thunderstorm days of a year concentrate in June to August, accounting for 74% of the year. The regions with highest probability of thunderstorms in the province are located in the central and south-central parts and the minimum probability area is located in the eastern par.