摘要
用EOF分解、聚类分析和相关分析法,对116a长江中下游5站逐年梅雨资料进行了检验。结果表明,用这5站的梅雨参数确实可以代表长江中下游梅雨的典型特征。根据梅雨量与候雨量的相关程度,分析了116a梅雨量集中的时段,对不同的梅雨参数用Morlet小波法分析了周期,找出了年际及年代际变化规律和趋势变化特征,并用滑动t检验法检验了是否发生突变。
Using EOF decomposition,cluster analysis and correlation analysis,116-year annual mei-yu data of five stations in the mid-lower reaches of the Changjiang river are examined.Results show that the five stations data can represent typical mei-yu characteristics in this region.According to the relation between mei-yu rainfall and pentad rainfall,the 116-year mei-yu rainfall-concentrated periods are analyzed.The four different mei-yu parameters' periods are analyzed by Morlet wavelet analysis.Laws of interannual and interdecadal variations and characteristics of trends are found.Climatic jumps are tested by the moving t-test.
出处
《南京气象学院学报》
CSCD
北大核心
2004年第1期65-72,共8页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金重点资助项目(40175021)
国家自然科学基金重点资助项目(40233037)
