摘要
为评估风云四号A卫星地表温度(FY-4A LST)产品在青藏高原区域的精度和适用性,本文针对2023年青藏高原区域,分别以同期的地面站点观测数据和MODIS LST产品(MOD11_L2)为参考,使用准确度、不确定性、精密度评估指标分析了FY-4A LST精度的空间分布和时间变化。结果表明:(1)FY-4A LST与地面站点观测和MODIS LST观测结果均具有较高一致性,准确度A值分别为-5.31和-0.77,但FY-4A LST存在低估的倾向;(2)FY-4A LST精度在空间分布上具有从东南向西北递减的趋势;(3)与地面站点观测数据对比在裸地区域精度最高,与MODIS LST对比在草地区域精度最高;(4)FY-4A LST在夏季偏离程度更大,低估程度更显著。
To evaluate the accuracy and applicability of the Fengyun-4A satellite land surface temperature(FY-4A LST)product over the Tibetan Plateau,focusing on the Tibetan Plateau region in 2023,using concurrent ground-based station observations and MODIS LST products(MOD11_L2)as references,the spatial distribution and temporal variations of FY-4A LST accuracy were analyzed based on assessment metrics including accuracy,uncertainty,and precision.The results show that:(1)FY-4A LST exhibits high consistency with both ground-based station observations and MODIS LST observations,with A values of-5.31 and-0.77,respectively.However,FY-4A LST exhibits a tendency toward underestimation.(2)The accuracy of FY-4A LST tends to decrease from southeast to northwest in spatial distribution.(3)Compared with ground-based station observations,the accuracy is highest in bare land areas,while compared with MODIS LST products,the accuracy is highest in grassland areas.(4)FY-4A LST exhibits a greater deviation and more significant underestimation in summer.
作者
吴丹芹
龙争
宋云帆
陈楠
刘佳
WU Danqin;LONG Zheng;SONG Yunfan;CHEN Nan;LIU Jia(Institute of Plateau Meteorology,China Meteorological Administration,Chengdu/Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072,China;Key Laboratory of Land Satellite Remote Sensing Application,Ministry of Natural Resources of the People's Republic of China,Beijing 100048,China;Wenjiang National Climate Observatory,Chengdu 610072,China;Sichuan Provincial Climate Centre,Chengdu 610072,China)
出处
《高原山地气象研究》
2026年第1期132-140,共9页
Plateau and Mountain Meteorology Research
基金
四川省自然科学基金项目青年基金项目(2025ZNSFSC1138)
自然资源部国土卫星遥感应用重点实验室开放课题(KLSMNR-202309)
川西南(雅安)暴雨实验室科技发展基金项目(CXNBYSYSMS202407)
高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目(SCQXKJYJXZD202409)。
