常州地区1978 年- 2012 年降水量时空分布特征

利用1978 年- 2012 年26 个雨量站资料, 基于线性回归、小波分析、滑动平均曲线等方法分析了常州地区降 水量时空分布特征, 结果表明: 35 年来常州地区降水量总体呈增加趋势, 降水变化存在5 a、10 a 两个主周期; 降水量 空间分布不均, 总体呈西南向东北递减的趋势, 全区多年降水存在两个上升中心; 城区降水多于郊区, 20 世纪80- 90 年代前期尤为明显。 Based o n t he precipitat ion dat a at 26 stat ions from 1978 t o 2012 in Chang zhou Area, the spat ial and temporal charac2 ter istics of precipitat ion w ere ana lyzed using t he liner r egr essio n, w avelet ana lysis, and moving aver age curv e methods. T he re2 sults show ed that annual precipitat ion has an increasing tr end, and t her e a re two main per iods of precipitatio n v ariation: 5 year s and 10 y ears. Precipitat ion has signif icantly spat ial va riations w ith higher v alues in southw est and low er values in no rtheast, and ther e are two precipitat ion r ising center s based on aver age annual pr ecipitatio n dat a. Precipitatio n is higher in t he ur ban and low2 er in the subur bs, especially fr om 1980s to ear ly 1990s.