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中国农学通报 ›› 2016, Vol. 32 ›› Issue (25): 166-169.doi: 10.11924/j.issn.1000-6850.casb16060039

所属专题: 农业气象

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

近50年菏泽地区雷暴日数的气候分布特征

程萌   

  1. 巨野县气象局
  • 收稿日期:2016-06-07 修回日期:2016-06-22 接受日期:2016-06-24 出版日期:2016-08-29 发布日期:2016-08-29
  • 通讯作者: 程萌
  • 基金资助:

Climatic Distribution Characteristics of Thunderstorm Days in Heze in Recent 50 Years

  • Received:2016-06-07 Revised:2016-06-22 Accepted:2016-06-24 Online:2016-08-29 Published:2016-08-29

摘要: 以观测雷暴日资料为基础,采取线性倾向分析法、Mann-Kendall检验法、morlet小波分析法,对菏泽地区雷暴日数的气候分布特征进行详细分析。发现1964~2013年间,菏泽各区县雷暴日数分布均匀。从20世纪60年代中期开始,年雷暴日数以2.9 d /10a的线性趋势显著减少。雷暴日数减少是一种突变现象,开始时间是1981年。在7年层次里,菏泽市雷暴日序列存在准15年周期的振荡,在20年层次里,菏泽市雷暴日序列存在准40年周期的振荡,20世纪80年代后期是一个转折点。雷暴日空间分布均匀。

关键词: 锡林郭勒, 锡林郭勒, MODIS, 植被指数, 草地生物量, S曲线回归模型

Abstract: Based on data of thunderstorm days in Heze, linear trend analysis, Mann-Kendall methods and Morlet wavelet analysis, etc. were adopted to analyze the climatic distribution characteristics of thunderstorm days. The results showed that: from 1964 to 2013, the number of thunderstorm days distributed evenly in every county of Heze; from the mid-1960s, the annual number of thunderstorm days reduced significantly with a linear trend of 2.9 d/10 a; the reducing number of thunderstorm days was a mutation phenomenon, it began in 1981. In 7 years’level, the sequence of thunderstorm day in Heze had a 15-year’s oscillation; in 20 years’ level, the sequence of thunderstorm day in Heze had a 40-year’s oscillation. Late 1980s was a turning point. The spatial distribution of thunderstorm days was even.