Spatiotemporal changes in sunshine duration and its influential factors in Chongqing,China from 1961 to 2020

作     者：LI Jun XIA Hongxuan JIANG Jinge XU Weifeng WEN Di XU Junfeng LI Jun;XIA Hongxuan;JIANG Jinge;XU Weifeng;WEN Di;XU Junfeng

作者机构：College of Geography and TourismChongqing Normal UniversityChongqing 401331China Key Laboratory of GIS Application of ChongqingChongqing 401331China Chongqing Key Laboratory of Earth Surface Processes and Environmental Remote Sensing in Three Gorges Reservoir areaChongqing 401331China Institute of Remote Sensing and Earth SciencesSchool of Institute of Remote Sensing and Earth SciencesSchool of ScienceHangzhou Normal UniversityHangzhou 311121China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2024年第21卷第6期

页      面：2005-2024页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：the National Key R&D Program(Grant No.2019YFE0115200) Natural Science Foundation of China(Grants No.42071217) 

主　　题：Sunshine duration Spatiotemporal changes Mann-Kendall test Wavelet analysis Geodetector model 

摘      要：The surface solar radiation in most parts of the world has undergone a phenomenon known as global dimming and brightening,characterized by an initial decrease followed by an *** a result,the sunshine duration(SD)has decreased in the past 60 *** the backdrop of global dimming and brightening,SD has decreased to varying degrees in many regions of *** the observed data of SD,cloud amount(total cloud amount and low cloud amount,abbreviated as TCA and LCA),precipitation,and relative humidity(RH)from 34 meteorological stations in Chongqing during the period of 1961-2020,along with a digital elevation model(DEM)with a resolution of 90 m,this study analyzed the spatiotemporal variations and influencing factors of *** analysis employed methods such as linear regression,Mann-Kendall test,wavelet transformation,and DEM-based possible SD distributed *** results showed that the annual SD in Chongqing has significantly decreased over the last 60 years,with a decreasing interannual trend rate(ITR)of 40.4 h/*** for no obvious trend in spring,SD decreased significantly in summer,autumn and winter at the ITR of 21.1 h/10a,8.5 h/10a and 7.5 h/10a,*** abrupt decrease in the annual SD was found in *** difference before and after the abrupt decrease was 177.7 *** difference before and after the abrupt decrease was 177.7 *** annual SD possessed the oscillation period of *** spatial heterogeneity of the mean annual SD during the last 60 years was *** distribution of SD in Chongqing is high in the northeast and low in the *** addition,about 73%of the total area in Chongqing showed a significant and very significant decreasing *** regions with significant changes are mainly concentrated in the regions with altitudes of 200~1000 *** increasing LCA was the main cause of the decrease of the annual SD in the regions with 200-400 m altitude decreased the most and changed the *** LCA is the prim