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Complementary-Relationship-Based Modeling of Terrestrial Evapotranspiration Across China During 1982-2012: Validations and Spatiotemporal Analyses
Ma, N (Ma, Ning)1; Szilagyi, J (Szilagyi, Jozsef)2,3; Zhang, YS (Zhang, Yinsheng)1,4; Liu, WB (Liu, Wenbin)5
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
2019
Volume124Issue:8Pages:4326-4351
DOI10.1029/2018JD029850 
Abstract

Having recognized the limitations in spatial representativeness and/or temporal coverage of (i) current ground ETa observations and (ii) land surface model-and remote sensing-based ETa estimates due to uncertainties in soil and vegetation parameters, a calibration-free nonlinear complementary relationship (CR) model is employed with inputs of air and dew-point temperature, wind speed, and net radiation to estimate 0.1 degrees, monthly ETa over China during 1982-2012. The modeled ETa rates were first validated against 13 eddy-covariance measurements, producing Nash-Sutcliffe efficiency values in the range of 0.72-0.94. On the basin scale, the modeled ETa values yielded a relative bias of 6%, and a Nash-Sutcliffe efficiency value of 0.80 in comparison with water-balance-derived evapotranspiration rates across 10 major river basins in China, indicating the CR-simulated ETa rates reliable over China. Further evaluations suggest that the CR-based ETa product is more accurate than seven other mainstream ETa products. The 31-year mean annual ETa value decreases from the southeast to the northwest in China, resulting in a country average of 406 +/- 15 mm/year. The country-representative annual ETa rates slightly decreased with a rate of -0.5 mm/year (p = 0.86) during 1982-2012. Annual ETa increased significantly over most parts of western and northeastern China but decreased significantly in many regions of the North China Plain as well as in the eastern and southern coastal regions. The present CR-based method, with its calibration-free nature and minimal data requirement, could help future calibrations/verifications of the more complex and more data-intensive land surface model-and remote sensing-based models.

Subject AreaAtmospheric Sciences
WOS IDWOS:000469071400004
Language英语
Indexed BySCI
KeywordEnergy-balance Closure Ecosystem Co2 Exchange Water-balance Tibetan Plateau Regional Evapotranspiration Evapo-transpiration Inner-mongolia Climate-change Heat-flux Evaporation
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
Cooperation Status国际
ISSN2169-897X
Department环境变化与地表过程
URL查看原文
PublisherAMER GEOPHYSICAL UNION
SubtypeArticle
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9327
Collection图书馆
Corresponding AuthorMa, N (Ma, Ning)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China;
2.Budapest Univ Technol & Econ, Dept Hydraul & Water Resources Engn, Budapest, Hungary;
3.Univ Nebraska, Conservat & Survey Div, Sch Nat Resources, Lincoln, NE USA;
4.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
5.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Ma, N ,Szilagyi, J ,Zhang, YS ,et al. Complementary-Relationship-Based Modeling of Terrestrial Evapotranspiration Across China During 1982-2012: Validations and Spatiotemporal Analyses[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(8):4326-4351.
APA Ma, N ,Szilagyi, J ,Zhang, YS ,&Liu, WB .(2019).Complementary-Relationship-Based Modeling of Terrestrial Evapotranspiration Across China During 1982-2012: Validations and Spatiotemporal Analyses.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(8),4326-4351.
MLA Ma, N ,et al."Complementary-Relationship-Based Modeling of Terrestrial Evapotranspiration Across China During 1982-2012: Validations and Spatiotemporal Analyses".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.8(2019):4326-4351.
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