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Intercomparison and evaluation of three global high-resolution evapotranspiration products across China
Bai, Peng; Liu, Xiaomang
2018-11-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume566Pages:743-755
Corresponding AuthorBai, Peng(baip@igsnrr.ac.cn) ; Liu, Xiaomang(liaoxfxm@163.com)
AbstractAccurate quantification of large-scale evapotranspiration (ET) has an important scientific and practical significance. In this study, three global high-resolution ET products were intercompared and evaluated across China; the evaluated ET products were the Global Land Evaporation Amsterdam Model (GLEAM) version 3.2, the Global Land Data Assimilation System (GLDAS) version 2.0 Catchment Land Surface Model (CLSM) dataset, and the Numerical Terradynamic Simulation Group (NTSG) dataset. The evaluations were performed at the site scale with eddy covariance (EC) based observations from eight flux stations, and at the basin scale with water balance-based ET estimates from 22 river basins in China. The intercomparison results indicated that the three products consistently presented an increasing trend over a large proportion of China but large differences in the trend of the annual ET and the mean annual ET estimates. The trends of the annual ET estimates derived from the GLEAM, GLDAS, and NTSG products are 0.449, 0.904 and 1.261 mm/yr(2), respectively; the countrywide mean annual ET derived from the three products are 390.2, 443.4 and 419.9 mm/yr, respectively. The site-scale evaluation results indicated that the GLEAM and NTSG products achieved comparable consistencies with the monthly gauge observations and outperformed the GLDAS product; GLEAM was more consistent with the daily gauge observations than GLDAS. At the basin scale, all three products were unable to reasonably reproduce the water balance-based annual ET time series in most basins; the three products systematically overestimated ET in the wet basins compared with the water balance-based ET estimates. The differences in the ET estimates among the ET products may be largely attributed to the discrepancies in the forcing data and model algorithms.
KeywordEvapotranspiration Assessment Uncertainty Water balance China
DOI10.1016/j.jhydrol.2018.09.065
WOS KeywordBASIN-SCALE EVAPOTRANSPIRATION ; WATER-BALANCE METHOD ; TERRESTRIAL EVAPOTRANSPIRATION ; LAND EVAPOTRANSPIRATION ; GRACE SATELLITES ; EVAPORATION ; CLIMATE ; PERFORMANCE ; MODEL ; MODIS
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of China[41330529] ; Natural Science Foundation of China[41601034] ; Natural Science Foundation of China[41571024]
Funding OrganizationNatural Science Foundation of China
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000449901100056
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52455
Collection中国科学院地理科学与资源研究所
Corresponding AuthorBai, Peng; Liu, Xiaomang
AffiliationChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Bai, Peng,Liu, Xiaomang. Intercomparison and evaluation of three global high-resolution evapotranspiration products across China[J]. JOURNAL OF HYDROLOGY,2018,566:743-755.
APA Bai, Peng,&Liu, Xiaomang.(2018).Intercomparison and evaluation of three global high-resolution evapotranspiration products across China.JOURNAL OF HYDROLOGY,566,743-755.
MLA Bai, Peng,et al."Intercomparison and evaluation of three global high-resolution evapotranspiration products across China".JOURNAL OF HYDROLOGY 566(2018):743-755.
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