1992—2021年阿拉善盟气候资源时空演变特征

Spatiotemporal Evolution Characteristics of Climate Resources in Alxa League from 1992 to 2021

本文利用1992—2021年地面常规观测资料,采用一元线性回归趋势分析及显著性检验、气候突变检验、统计学方法,研究阿拉善盟气候资源的变化特征。结果表明,风资源呈逐年减少的趋势,光资源的年平均日照时数在时间上呈逐渐减少的趋势。额济纳旗太阳能资源评估等级为B级以上;热资源呈逐年增加的趋势,其中年平均气温、年平均积温和年平均无霜期日数的气候倾向率分别为0.4℃/10 a、82.2℃/10 a、3 d/10 a;降水资源在时间上总体呈逐年增加趋势,在空间上自西北部向东部和西南部逐渐增加。年平均气温在2013年发生突变。

This paper uses conventional ground observation data from 1992 to 2021,and uses univariate linear regression trend analysis,significance test,climate change test,and statistical methods to study the changing characteristics of climate resources in Alxa League.The results indicate that wind resources are decreasing year by year,while the average annual sunshine hours of light resources are gradually decreasing over time.The evaluation level of solar energy resources in Ejina Banner is B level or above;the trend of thermal resources is increasing year by year,with climate trends of annual average temperature,annual average accumulated temperature,and annual average frost free days being 0.4℃/10 a,82.2℃/10 a,and 3 d/10 a,respectively;the overall trend of precipitation resources is increasing year by year in time,gradually increasing from the northwest to the east and southwest in space.The annual average temperature experienced a sudden change in 2013.