摘要
为揭示天津市及其周围地区(±3°)旱涝变化的时间演变特征和变化趋势,采用相关分析、累积距平、滑动t检验、小波分析等统计分析方法,对该地区5个站1470-2000年的旱涝资料进行了分析。结果表明,该地区旱涝变化基本一致,旱年、涝年呈正态分布;在这段时期里,有4个比较显著的干旱、洪涝阶段;旱涝变化有大约10,20和36 a的周期性,和太阳活动周期密切相关。
To reveal the temporal variation characteristics of drought/flood in Tianjin city and its surrounding region （ ± 3°）, the drought or flood data of 5 stations there from 1470 to 2000 were analyzed by using statistical analysis methods, such as correlation analysis, accumulative anomaly, moving t - test, wavelet method and so on. The results show that the flood or drought variance was almost the same; the years occurring flood or drought presented normal distribution; there were four evident flood/drought periods during 1470 -2000; the periodicity of flood/drought variance was about 10, 20 and 36 years.
出处
《干旱气象》
2007年第1期21-24,共4页
Journal of Arid Meteorology
基金
西部之光项目"太阳活动的地球物理效应(034201101)"资助
关键词
天津
旱涝变化
累积距平
小波分析
Tianjin
flood/drought variance
accumulative anomaly
wavelet analysis
