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Impact of clouds on the estimation of daily evapotranspiration from MODIS-derived instantaneous evapotranspiration using the constant global shortwave radiation ratio method
Jiang, Yazhen1,2; Tang, Ronglin1,3; Jiang, Xiaoguang1,4; Li, Zhao-Liang2,5
2019
Source PublicationINTERNATIONAL JOURNAL OF REMOTE SENSING
ISSN0143-1161
Volume40Issue:5-6Pages:1930-1944
Corresponding AuthorTang, Ronglin(tangrl@lreis.ac.cn) ; Jiang, Xiaoguang(xgjiang@ucas.ac.cn)
AbstractUpscaling instantaneous evapotranspiration (ET), retrieved at a specific satellite overpass time, to a daily scale is a key issue in drought monitoring, water resource management, and climate change study. The constant global shortwave radiation ratio method, which maintains a constant ratio of incoming global shortwave radiation to ET during the diurnal cycle, is reported to be robust when temporally upscaling instantaneous ET. However, this temporal upscaling method is typically used on clear-sky days. This study aims to evaluate cloud effects on the constant global shortwave radiation ratio method for extrapolating instantaneous ET from Moderate Resolution Imaging Spectroradiometer and ancillary data to daily scale at the Yucheng station in China. Partly cloudy-sky (clear during satellite transit) and clear-sky days were selected using measured downward global shortwave irradiances; each partly cloudy-sky had a hypothetical clear-sky counterpart. Then, daily ET was estimated by extrapolating the instantaneous ET using the constant global shortwave radiation ratio method under clear-sky, partly cloudy-sky, and hypothetical clear-sky conditions. The results showed that (a) upscaled ET for clear-sky days had a bias of -4.3 W m(-2) and a root mean square error (RMSE) of 14.5 W m(-2), and upscaled ET on partly cloudy-sky days had a bias of -7.8 W m(-2) and an RMSE of 18.9 W m(-2), with more serious underestimations under partly cloudy-sky conditions and (b) daily ET obtained under partly cloudy-sky conditions were reduced due to cloud effects comparing with that under hypothetical clear-sky conditions.
DOI10.1080/01431161.2018.1482025
WOS KeywordNET-RADIATION ; SURFACE ; RECONSTRUCTION ; VARIABILITY ; SCALES ; FLUXES ; TIME
Indexed BySCI
Language英语
Funding ProjectChina Scholarship Council ; International Science and Technology Cooperation Program of China[2014DFE10220] ; National Natural Science Foundation of China[41231170] ; National Natural Science Foundation of China[41571351] ; National Natural Science Foundation of China[41571352] ; National Natural Science Foundation of China[41571367] ; National Basic Research Program of China (973 Program)[2013CB733402]
Funding OrganizationChina Scholarship Council ; International Science and Technology Cooperation Program of China ; National Natural Science Foundation of China ; National Basic Research Program of China (973 Program)
WOS Research AreaRemote Sensing ; Imaging Science & Photographic Technology
WOS SubjectRemote Sensing ; Imaging Science & Photographic Technology
WOS IDWOS:000464043900021
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/48148
Collection中国科学院地理科学与资源研究所
Corresponding AuthorTang, Ronglin; Jiang, Xiaoguang
Affiliation1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
2.CNRS, UdS, BIcube UMR7357, Illkirch Graffenstaden, France
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China
4.Chinese Acad Sci, Acad Optoelect, Key Lab Quantitat Remote Sensing Informat Technol, Beijing, Peoples R China
5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Agri Informat, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Yazhen,Tang, Ronglin,Jiang, Xiaoguang,et al. Impact of clouds on the estimation of daily evapotranspiration from MODIS-derived instantaneous evapotranspiration using the constant global shortwave radiation ratio method[J]. INTERNATIONAL JOURNAL OF REMOTE SENSING,2019,40(5-6):1930-1944.
APA Jiang, Yazhen,Tang, Ronglin,Jiang, Xiaoguang,&Li, Zhao-Liang.(2019).Impact of clouds on the estimation of daily evapotranspiration from MODIS-derived instantaneous evapotranspiration using the constant global shortwave radiation ratio method.INTERNATIONAL JOURNAL OF REMOTE SENSING,40(5-6),1930-1944.
MLA Jiang, Yazhen,et al."Impact of clouds on the estimation of daily evapotranspiration from MODIS-derived instantaneous evapotranspiration using the constant global shortwave radiation ratio method".INTERNATIONAL JOURNAL OF REMOTE SENSING 40.5-6(2019):1930-1944.
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