干旱区地理2025，Vol.48Issue(5)：765-777,13.DOI:10.12118/j.issn.1000-6060.2024.087
基于实测数据的黑河流域多源地表温度产品误差分析
Error analysis of multi-source land surface temperature products in the Heihe River Basin based on in-situ data
摘要
Abstract
This study used in-situ land surface temperature observation data(from 2017 to 2019)from seven sta-tions in the Heihe River Basin,northern Gansu Province,China,to evaluate the errors of four land surface temper-ature products:the Fengyun-3C visible and infrared radiometer(FY-3C VIRR)land surface temperature product,the Terra moderate resolution imaging spectroradiometer(MOD11A1/MOD11C3)land surface temperature prod-uct,the European Center for medium-range weather forecasts fifth-generation land surface reanalysis dataset(ERA5-LAND),and the China Meteorological Administration land data assimilation system(CLDAS-V2.0).Bi-as(BIAS),root mean square error(RMSE),correlation coefficient(CC),and ratio of standard deviation(RSD),were employed as statistical metrics for analyzing errors across different temporal scales.The results indicated the following.(1)All four land surface temperature products exhibited a general spatial pattern of higher tempera-ture in the south and lower temperature in the north.However,the FY-3C VIRR and MOD11A1 products exhibit-ed finer spatial details.(2)The FY-3C VIRR daytime land surface temperature product demonstrated relatively lower BIAS and RMSE values,indicating higher accuracy.Further,the MOD11A1 daytime land surface tempera-ture product yielded the highest CC values,ranging across 0.957-0.987.However,it also produced larger errors.This was attributed to the tendency of the MOD11A1 daytime product to overestimate temperatures.(3)The MOD11A1 nighttime land surface temperature product outperformed the FY-3C VIRR,ERA5-LAND,and CL-DAS-V2.0 nighttime products in terms of accuracy.Among these,the CLDAS-V2.0 nighttime product exhibited the largest errors.(4)For the FY-3C VIRR,MOD11A1,and ERA5-LAND products,the nighttime land surface temperature accuracy surpassed those of their respective daytime products.Conversely,the CLDAS-V2.0 day-time land surface temperature product exhibited higher accuracy than its nighttime counterparts.关键词
地表温度/FY-3C VIRR/MODlS/ERA5-LAND/CLDAS-V2.0/黑河流域Key words
land surface temperature/FY-3C VIRR/MODIS/ERA5-LAND/CLDAS-V2.0/Heihe River Basin引用本文复制引用
李旭,江红南,许剑辉..基于实测数据的黑河流域多源地表温度产品误差分析[J].干旱区地理,2025,48(5):765-777,13.基金项目
新疆维吾尔自治区重点实验室开放课题(2023D04060)资助 （2023D04060）
