摘要
利用石河子气象局地面观测站1954—2009年的雷暴观测资料,对该地区雷暴的气候变化特征进行了统计分析。结果表明:石河子地区属于少雷区,年雷暴日数年际变化呈下降趋势,月雷暴日数最高值在7月,占全年雷暴日数的34.6%,石河子4月开始有雷暴天气,10月后雷暴结束。雷暴日的日变化中,高值出现在14-17时,以10分钟内雷暴发生频数最高,56年来石河子年雷暴日变化具有一定的周期性,W方位雷暴出现的概率最高。
Using annual thunderstorms data of Shihezi meteorological bureau during 1954-2009, analysis varia- tion of thunderstorm days. The results showed that： Shihezi is a rare thunder area, the annual number of thun- derstorm days are decreased, monthly thunderstorm days are maximum in July, Accounted for 34.6% of the year thunderstorm days, thunderstorms began in April in Shihezi , and end after October, the thunderstorm The di- urnal peak variation of thunderstorm occurred at 14h--17h, 10 minutes, the occurred highest frequency thun- derstorms are within 10 minutes, thunderstorms change has a certain periodicity during 56 years in Shihezi, the highest probability of thunderstorms occur in W postion.
出处
《青海气象》
2013年第1期42-45,共4页
Journal of Qinghai Meteorology
关键词
雷暴
统计
MORLET小波
分析
石河子
thunderstorm, statistical analysis, Morlet wavelet analysis, Shihezi
