Impact of clouds on the estimation of daily evapotranspiration from MODIS-derived instantaneous evapotranspiration using the constant global shortwave radiation ratio method

doi:10.1080/01431161.2018.1482025

	Impact of clouds on the estimation of daily evapotranspiration from MODIS-derived instantaneous evapotranspiration using the constant global shortwave radiation ratio method
	Jiang, Yazhen 1,2; Tang, Ronglin 1,3; Jiang, Xiaoguang 1,4; Li, Zhao-Liang 2,5
刊名	INTERNATIONAL JOURNAL OF REMOTE SENSING
	2019
卷号	40 期号:5-6 页码:1930-1944
ISSN号	0143-1161
DOI	10.1080/01431161.2018.1482025
通讯作者	Tang, Ronglin(tangrl@lreis.ac.cn) ; Jiang, Xiaoguang(xgjiang@ucas.ac.cn)
英文摘要	Upscaling 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.
资助项目	China 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]
WOS关键词	NET-RADIATION ; SURFACE ; RECONSTRUCTION ; VARIABILITY ; SCALES ; FLUXES ; TIME
WOS研究方向	Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000464043900021
资助机构	China Scholarship Council ; International Science and Technology Cooperation Program of China ; National Natural Science Foundation of China ; National Basic Research Program of China (973 Program)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/48147]
专题	中国科学院地理科学与资源研究所
通讯作者	Tang, Ronglin; Jiang, Xiaoguang
作者单位	1.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
推荐引用方式 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.