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Biophysical constraints on evapotranspiration partitioning for a conductance-based two source energy balance model

文献类型：期刊论文

作者Bu, Jingyi1,2,3; Gan, Guojing4; Chen, Jiahao2,3; Su, Yanxin2,3; Garcia, Monica1; Gao, Yanchun2
刊名JOURNAL OF HYDROLOGY
出版日期2021-12-01
卷号603页码:22
关键词Evapotranspiration Gc-TSEB Optimal stomatal model Complementary concept MODIS LST
ISSN号0022-1694
DOI10.1016/j.jhydrol.2021.127179
通讯作者Gan, Guojing(gjgan@niglas.ac.cn) ; Gao, Yanchun(gaoyanc@igsnrr.ac.cn)
英文摘要Evapotranspiration (ET) plays an indispensable role in water-carbon-energy exchange between the land surface and atmosphere. Biophysical constraints like the canopy conductance lie the key to accurate prediction of plant transpiration (T) and soil evaporation (E) in ET models. Given the lack of comprehensive evaluation for resistances network in conductance-based two source energy balance model (TSEB), three scenarios (Gc-TSEBO, GcTSEBOSM, and Gc-TSEBSWC) were assessed on the frame of Gc-TSEB: one relying on Jarvis canopy conductance, other on optimal stomatal behavior, and other on soil moisture content, with forcing data from MODIS datasets and in-situ FLUXNET sites over six biome types. The ET simulated by the model combined with the optimal stomatal behavior and the complementary concept had higher values of R2 and Taylor skill scores, lower values of RMSE and BIAS, than the other two scenarios, particularly over cropland sites and arid/semi-arid sites where the other two failed. The sensitivity analysis for Gc-TSEB resistances elucidated that the effect of canopy conductance is more noticeable on ET simulation than the other resistances. When effective biophysical constraints on the canopy are lacking, a large deviation exists in ET partitioning mainly due to the systematic error of soil evaporation through the partitioning algorithm for soil and plant fluxes. We assessed the performance of calibration from MODIS land surface temperature (LST) instead of flux data. The LST-calibrated model performed better in croplands and grasslands compared to forest sites, which opens a good perspective to advance the model for operational applications in agriculture and herbaceous vegetation.
WOS关键词RADIOMETRIC SURFACE-TEMPERATURE ; CARBON-DIOXIDE EXCHANGE ; CANOPY CONDUCTANCE ; EDDY-COVARIANCE ; MEDITERRANEAN DRYLANDS ; FLUX ESTIMATION ; 2-SOURCE MODEL ; TIME-SERIES ; TERRESTRIAL EVAPOTRANSPIRATION ; GLOBAL EVAPOTRANSPIRATION
资助项目National Key Project for Research and Development of China[2016YFC0501605] ; Na-tional Natural Science Foundation of China[41430861]
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:000731712000001
出版者ELSEVIER
资助机构National Key Project for Research and Development of China ; Na-tional Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/168844]  
专题中国科学院地理科学与资源研究所
通讯作者Gan, Guojing; Gao, Yanchun
作者单位1.Tech Univ Denmark, Dept Environm Engn, DK-2800 Lyngby, Denmark
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714		 Bu, Jingyi,Gan, Guojing,Chen, Jiahao,et al. Biophysical constraints on evapotranspiration partitioning for a conductance-based two source energy balance model[J]. JOURNAL OF HYDROLOGY,2021,603:22.
APA Bu, Jingyi,Gan, Guojing,Chen, Jiahao,Su, Yanxin,Garcia, Monica,&Gao, Yanchun.(2021).Biophysical constraints on evapotranspiration partitioning for a conductance-based two source energy balance model.JOURNAL OF HYDROLOGY,603,22.
MLA Bu, Jingyi,et al."Biophysical constraints on evapotranspiration partitioning for a conductance-based two source energy balance model".JOURNAL OF HYDROLOGY 603(2021):22.

入库方式： OAI收割

来源：地理科学与资源研究所

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