近50年锦州地区降水及旱涝变化特征分析

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。

Change Characteristics Analysis on Precipitation and Drought and Flood in Jinzhou in Recent 50 Years

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 spectrum 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 anal...