地表蒸散发遥感产品在不同生态系统的评估
Evaluation of surface evapotranspiration remote sensing products across different ecosystems
廖志朗 1欧虹伶 1欧阳家萌 1柳小敏 1李芷霓1
作者信息
- 1. 贺州市气象局,广西 贺州 542899
- 折叠
摘要
利用分属三个生态系统的6个通量站实测数据,对UM-A、MOD16两种地表蒸散发遥感产品开展验证工作,分析两个遥感产品的时间变化一致性,使用相关系数、协方根误差和平均绝对误差对产品进行精度验证及评估,探讨不同地表蒸散发遥感产品所适用的生态系统.结果表明,整体上两个产品时间变化趋势均与通量站数据相似,在精度上,在森林生态系统和草地生态系统UM-A产品表现更好,在农田生态系统MOD16产品表现更好.UM-A产品适用于森林和草地生态系统,MOD16产品适用于农田生态系统.在下垫面是常绿阔叶林或高寒矮嵩草草甸植被时,UM-A产品表现更好;当下垫面是松树为主的针叶林时,则是MOD16产品表现更好.
Abstract
Based on the ground-measured data from six flux towers belonging to three distinct ecosystems a validation was carried out for two surface evapotranspiration(ET)remote sensing products:UM-A and MOD16,to analyse the temporal consistency between these remote sensing products,and to assess the accuracy of the products by using correlation coefficients,root mean square error(RMSE),and mean absolute error(MAE),as well as to explore the ecosystems where the different surface evapotranspiration remote sensing products are suitable for.Results indicate that both products have similar temporal trends to the flux station data,with UM-A exhibiting better performance in forest and grassland ecosystems,and MOD16 in farmland ecosystems.The UM-A product performs better when the vegetation cover consists of evergreen broadleaf forests or alpine Kobresia meadows.Conversely,MOD16 is preferred for ecosystems dominated by pine forests.
关键词
地表蒸散发遥感产品/生态系统/通量站/MOD16Key words
surface evapotranspiration remote sensing products/ecosystems/flux stations/MOD16引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据