基于地理探测器分析青藏高原降水δ^(18)O空间分异特征  

Spatial heterogeneity of annual precipitation δ^(18)O over the Tibetan Plateau based on the use of a geographical detector

作　　者：席文涛 高晶[1,3] XI Wentao;GAO Jing(Key laboratory of Tibetan Environment Changes and Land Surface Process,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;Center for Excellence in Tibetan Plateau Earth Sciences,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]中国科学院青藏高原研究所,中国科学院青藏高原环境变化与地表过程重点实验室,北京100101 [2]中国科学院大学,北京100049 [3]中国科学院青藏高原地球科学卓越创新中心,北京100101

出　　处：《干旱区研究》2021年第5期1199-1206,共8页Arid Zone Research

基　　金：国家自然科学基金面上项目(41871068);国家自然科学基金优秀青年科学基金项目(41922002)。

摘　　要：地理探测器是研究地理现象的空间分异性,并且定量分析其驱动因子的一种统计方法。利用地理探测器方法对青藏高原24个站点的降水δ^(18)O年均值进行了分析,该方法可在一定程度上反映青藏高原降水δ^(18)O年均值的空间分异性,得出纬度、海拔、经度和降水量对青藏高原降水δ^(18)O年均值空间分异的解释力分别为0.82、0.71、0.57和0.49,温度对青藏高原降水δ^(18)O年均值空间分异的解释力不显著;因子之间的共同作用增强了降水δ^(18)O年均值在空间上的分异性。讨论了青藏高原站点降水δ^(18)O年均值与纬度、经度、海拔、年降水量和年均温之间的关系,并对降水δ^(18)O主控因子的季节变化进行分析,得出纬度对青藏高原降水δ^(18)O年均值、夏季均值和冬季均值空间分异的解释力均为最强。The annual precipitationδ^(18)O from 24 stations over the Tibetan Plateau was analyzed based on the use of a geographical detector,which was applied to probe the spatial heterogeneity of precipitationδ^(18)O and to quantitatively understand the drivers.This method was used to successfully reflect the spatial heterogeneity of the annual precipitationδ^(18)O over the Tibetan Plateau.The latitude,altitude,longitude,and precipitation amounts respectively explained 0.82,0.71,0.57,and 0.49 of the spatial variation in annual precipitationδ^(18)O.Additionally,the combined effects of different factors enhanced the explanation of spatial variation.The possible influences of latitude,precipitation amount,altitude,and temperature on annual precipitationδ^(18)O and seasonal variations in influential factors that cause the spatial heterogeneity of precipitationδ^(18)O were discussed.We conclude that latitude has the strongest explanatory power in relation to the spatial heterogeneity of annual,summer,and winter mean precipitationδ^(18)O over the Tibetan Plateau.

关 键 词：青藏高原 降水δ18O 空间分异性 地理探测器 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P426.6[天文地球—测绘科学与技术]