• 作者： 陳英;吳清吉
• 作者服務機構： 美國羅厄爾大學電機工程系;國立臺灣大學大氣科學系
• 中文摘要： 本文目的在研究臺北地區閃電發生頻率之一些統計特性。文中選用了四十九次雷雨，並根據每一次雷雨閃電發生平均次數或強度Ra，將之區分為弱度閃電雷雨、中度閃電雷雨及強度閃電雷雨等三類。其強度範圍順序為（方程式無法摘錄）。（Ra單位為次數／分鐘）。在擬合觀測頻率分配過程中，引用了對數常態、常態、伽瑪及指數分配；發現伽瑪分配在所有三類雷雨中可得最佳結果。在研究閃電頻率在一雷雨的生命期間所發生的變化，作者利用每一雷雨閃電發生頻率的變化求得合成直方圖。從直方圖研究中、可知常態分配對中度及強度閃電雷雨比較適合。但由於個別雷雨的隨機分配，弱度閃電雷雨的合成分配沒呈現出變化。每一類雷雨所得的結果與每一雷雨閃電發生總次數的權重無關。
• 英文摘要： Some statistical characteristics of the lightning flashing rates for the local thunderstorms in Taipeiare studied. Forty nine thunderstorms were selected and first divided into three classes according to theaverage flashing rate or intensity Ra of each thunderstorm. The respective ranges are (方程式無法摘錄)flashes/minute for low, medium and high intensity thunderstorms. In fitting the observedfrequency by the log-normal, normal, gamma and exponential distributions, it is found that gamma dis-tribution is the best for all three classes. On studying the variations of the flashing rate during the life timeof a thunderstorm, composite histograms are obtained. The normal distribution is adequate for the mediumand high intensity classes. Due to the random distributions of individual thunderstorms, the composite dis-tribution of the low intensity class appears to be uniform. The results in each class are independent of theweighting of the total flashes in each thunderstorm.
• 中文關鍵字： frequenCy distributton; lightning flash rate; lightning intensity; thunderstorm; variation of flashing rate
• 英文關鍵字： --