摘要
[目的]研究枣庄地区春旱降雨特征。[方法]基于相对湿润度指数的干旱分析方法,应用枣庄地区35°N南北2个气象站1961-2010年逐日气象资料分析枣庄地区近50a春旱气候特征。[结果]1961-2010年间枣庄地区春季相对湿润度指数平均值在-0.64^-0.59之间,呈不显著变湿趋势。枣庄地区35°N以北春旱频率高达88%,35°N以南春旱频率为76%。20世纪60、90年代及2000年代枣庄地区北部春旱比南部严重,70年代南北春旱等级分布基本接近,80年代南部地区春旱比北部严重。60、90年代春季中旱高发,70年代、2000年代轻旱高发,80年代重旱高发。[结论]枣庄地区南北部春季暴雨日数的显著差异是导致春旱频率明显差异的主要原因。春季干旱最明显的振荡周期是6a左右。
[Objective]In order to study the characteristics of sprirg drought.[Methods]Drought analysis method which was based on relative moisture index,used daily meteorological data from 1961 to 2010of the two stations on both sides of 35°N in Zaozhuang,climate characteristics of spring drought was analysis for recent 50 years in Zaozhuang.[Results]The results showed that average of spring relative moisture index in Zaozhuang was between 0.64~0.59from1961 to 2010,present not significant wet trends.Spring drought frequency as high as 88% in northern of 35°N in Zaozhuang,spring drought frequency was 76%in southern of 35°N.Northern spring drought degree was more serious than southern for 60 s,90s,2000 sin Zaozhuang.Drought degree was closed of northern and southern for 70 s,southern drought degree was more serious than northern for 80 s.Moderate drought occurred frequently in 60 sand 90s,light drought occurred frequently in 70 sand 2000s,heavy drought occurred frequently in 80 s.[Conclusion]Significant differences of Spring heavy rainy days was the main reason of obvious differences of spring drought frequency in northern and southern of Zaozhuang.The main oscillation period of spring drought was around 6a.
出处
《山西农业大学学报（自然科学版）》
CAS
2016年第8期580-585,共6页
Journal of Shanxi Agricultural University(Natural Science Edition)
关键词
相对湿润度指数
春旱
频率
周期
Relative moisture index
Spring drought
Frequency
Period
