呼和浩特市沙尘暴发生规律的初步研究

将呼和浩特市1955-2001年沙尘暴天气分别以月、日、时进行划分,用SPSS统计软件通过分位数图分别进行分析,发现每年沙尘暴天气出现次数符合正态分布,沙尘暴的发生主要集中每年的3~6月,平均每年发生3次以上。除19时、20时外,每天其他时刻发生沙尘暴次数也服从正态分布,每日的19时、20时发生的沙尘暴次数明显与正态分布不相符,这一现象的产生原因值得深入研究。每月沙尘暴出现次数不符合正态分布。

Occurrence Regularity of Sandstorm in Hohhot

Sandstorm occurred in Hohhot from 1955 to 2001 are divided according to month,day and hour separately,which have been analyzed with SPSS by use of Quantile Quantileplot.The results show that the occurrence of sandstorm in every year accord with normal distribution.Sandstorm mainly occurs in March,April,May and June with over three times each year.Except 19 o'clock and 20 o'clock,the frequency of sandstorm occurred in other time each day accord with normal distribution,the frequency of sandstorm occurred at ...