摘要
根据1960-2005年锦州地区降水资料，对年际、春季和夏季降水序列通过线性趋势估计法和谱分析法分析了锦州自20世纪60年代以来降水的演变趋势及周期变化，并且根据降水量和降水量距平百分比统计了锦州近50年旱涝变化特征。结果表明，锦州地区年降水量和夏季降水量呈波动减少的趋势，而春季降水却呈上升的趋势。年、春季和夏季降水序列都存在3-5年的高频震荡。通过旱涝统计，锦州地区平均近2年就出现一次干旱。
Based on precipitation data in Jinzhou from 1960 to 2004, the characteristics of year spring and summer precipitation were analyzed with liner trend estimation and spectnun analysis methods . And statistic characteristics of drought and flood change were analyzed.The result showed that annual precipitation and summer precipitation in Jinzhou presented an upward trend, and spring precipitation presented a downward trend, there were periodical changes with 3 -5 years in precipitation variation. According to the analysis of drought and flood, there was a drought every two years in Jinzhou.
出处
《安徽农业科学》
CAS
北大核心
2009年第12期5572-5573,5595,共3页
Journal of Anhui Agricultural Sciences
关键词
降水
旱涝
线性趋势估计
谱分析
Precipitation
Drought and flood
Liner trend estimation
Spectaum analysis
