干旱区生态环境知识资源中心(Arid): Assessing Satellite, Land Surface Model and Reanalysis Evapotranspiration Products in the Absence of In-Situ in Central Asia

Arid

DOI	10.3390/rs13245148
	Assessing Satellite, Land Surface Model and Reanalysis Evapotranspiration Products in the Absence of In-Situ in Central Asia
	Ochege, Friday Uchenna; Shi, Haiyang; Li, Chaofan; Ma, Xiaofei; Igboeli, Emeka Edwin; Luo, Geping
通讯作者	Luo, GP (corresponding author)，Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, 818 South Beijing Rd, Urumqi 830011, Peoples R China. ; Luo, GP (corresponding author)，Chinese Acad Sci, Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China. ; Luo, GP (corresponding author)，Univ Chinese Acad Sci, Beijing 100039, Peoples R China.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2021
卷号	13 期号:24
英文摘要	Shortfalls in regular evapotranspiration (ET) monitoring and evaluation pose a huge challenge to agricultural water resource distribution in arid Central Asia (CA). In this study, a first detailed regional assessment of GLEAM, ERA5, MERRA2, CLSM and NOAH ET products in CA was performed by systematically implementing the triple collocation (TC) method, in which about 36,936 grid cells for each ET data (within a six-triplet design) were collocated, at 0.25 degrees and with monthly resolutions during 2003-2020. The reliability of the strategy adopted was confirmed in four arid biomes using standard evaluation metrics (R, RMSE and BIAS), and by spatiotemporal cross-validation of the six ET triplets across CA. Results show that the systematic TC method produced more robust ET product assessment metrics with reduced RMSEs compared to the initial ET product validation using in-situ, which showed weak-positive correlation and high negative bias-range (i.e., -21.02 <= BIAS < 16 mm) in the four arid biomes of CA. The spatial cross-validation by TC showed that the magnitude of ET random errors significantly varies, and confirms the systematic biases with site-scale measurements. The highest ET uncertainties by CLSM (27.43%), NOAH (29.16%), MERRA2 (38.28%), ERA5 (36.75), and GLEAM (41%) were more evident in the shrubland, cropland, grassland, cropland again, and desert biomes, respectively. Moreover, error magnitudes in high altitudes (Tianshan Mountain range) are generally lower than in plain-desert areas. All ET products spatially captured ET dynamics over CA, but none simultaneously outperformed the other. These findings are invaluable in the utilization of the assessed ET products in supporting regional water resource management, particularly in CA.
英文关键词	evapotranspiration triple collocation arid ecosystem biomes satellite land surface model reanalysis
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000737411700001
WOS关键词	TRIPLE COLLOCATION ; SOIL-MOISTURE ; UNCERTAINTY ; FLUXNET ; GLEAM ; VARIABILITY ; EVAPORATION ; LANDSCAPES ; EUROPE ; ASCAT
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375790
作者单位	[Ochege, Friday Uchenna; Shi, Haiyang; Ma, Xiaofei; Igboeli, Emeka Edwin; Luo, Geping] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, 818 South Beijing Rd, Urumqi 830011, Peoples R China; [Ochege, Friday Uchenna; Shi, Haiyang; Ma, Xiaofei; Luo, Geping] Chinese Acad Sci, Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China; [Ochege, Friday Uchenna] Univ Port Harcourt, Dept Geog & Environm Management, PMB 5323 Choba, Port Harcourt 500004, Nigeria; [Shi, Haiyang; Igboeli, Emeka Edwin; Luo, Geping] Univ Chinese Acad Sci, Beijing 100039, Peoples R China; [Shi, Haiyang] Univ Ghent, Dept Geog, B-9000 Ghent, Belgium; [Li, Chaofan] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Peoples R China; [Igboeli, Emeka Edwin] Univ Nigeria, Dept Geog, Nsukka 410001, Nigeria
推荐引用方式 GB/T 7714	Ochege, Friday Uchenna,Shi, Haiyang,Li, Chaofan,et al. Assessing Satellite, Land Surface Model and Reanalysis Evapotranspiration Products in the Absence of In-Situ in Central Asia[J],2021,13(24).
APA	Ochege, Friday Uchenna,Shi, Haiyang,Li, Chaofan,Ma, Xiaofei,Igboeli, Emeka Edwin,&Luo, Geping.(2021).Assessing Satellite, Land Surface Model and Reanalysis Evapotranspiration Products in the Absence of In-Situ in Central Asia.REMOTE SENSING,13(24).
MLA	Ochege, Friday Uchenna,et al."Assessing Satellite, Land Surface Model and Reanalysis Evapotranspiration Products in the Absence of In-Situ in Central Asia".REMOTE SENSING 13.24(2021).