摘要
在气候变暖背景下,全球乃至区域降水模式发生着深刻变化。以东北地区1961—2020年的207个气象站点降水资料为基础,采用线性回归、小波分析和普通Kriging方法,研究了该地降水量倾向斜率及其空间分布特征。结果表明,研究时域内东北地区多年降水量平均值为532.17 mm,倾向斜率为1.169 mm/a。研究区内分别有75%、25%的气象站点降水量呈现增加、减少的倾向趋势,其中减少的趋势主要集中于大兴安岭、内蒙古高原东部地区,并明确了东北地区降水量变化趋势在空间上的分布规律,可为气候环境研究提供一定参考。
Global and regional precipitation patterns have undergone profound changes under the background of global climate warming.Based on the precipitation data of 207 meteorological stations in Northeast China collected from 1961 to 2020,linear regression,wavelet analysis and ordinary Kriging method are adopted to study the precipitation tendency slope and its spatial distribution characteristics in the region.The results show that the average annual precipitation in Northeast China in the study time domain is 532.17 mm,and the tendency slope is 1.169 mm/a.In the study area,75%of the meteorological stations show a trend of increasing in precipitation and 25%show a trend of decreasing,and the decreasing trend is mainly concentrated in the Greater Khingan Mountains and the eastern Inner Mongolia Plateau.This paper clarifies the spatial distribution patterns of precipitation trends in Northeast China,which can provide reference for climate and environment research.
作者
刘建超
LIU Jianchao(Liaoning Runzhong Water Supply Co.,Ltd.,Shenyang 110000,China)
出处
《西北水电》
2022年第4期12-15,共4页
Northwest Hydropower
关键词
降水量
趋势分析
空间插值
小波分析
东北地区
precipitation
trend analysis
spatial interpolation
wavelet analysis
Northeast China
