DOI: 10.5194/hess-22-111-2018
Scopus记录号: 2-s2.0-85040338662
论文题名: Pairing FLUXNET sites to validate model representations of land-use/land-cover change
作者: Chen L ; , Dirmeyer P ; A ; , Guo Z ; , Schultz N ; M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 1 起始页码: 111
结束页码: 125
语种: 英语
Scopus关键词: Deforestation
; Forestry
; Land use
; Surface measurement
; Community land models
; Energy partitioning
; Land atmosphere interaction
; Land surface models
; Land use/land cover change
; Meteorological condition
; Model representation
; Surface heat fluxes
; Heat flux
; albedo
; climate feedback
; deforestation
; heat flux
; hydrological change
; land cover
; land surface
; land use change
; land-atmosphere interaction
; model validation
; net radiation
; parameterization
; performance assessment
; surface energy
; uncertainty analysis
英文摘要: Land surface energy and water fluxes play an important role in land-atmosphere interactions, especially for the climatic feedback effects driven by land-use/landcover change (LULCC). These have long been documented in model-based studies, but the performance of land surface models in representing LULCC-induced responses has not been investigated well. In this study, measurements from proximate paired (open versus forest) flux tower sites are used to represent observed deforestation-induced changes in surface fluxes, which are compared with simulations from the Community Land Model (CLM) and the Noah Multi-Parameterization (Noah-MP) land model. Point-scale simulations suggest the CLM can represent the observed diurnal and seasonal changes in net radiation (Rnet) and ground heat flux (G), but difficulties remain in the energy partitioning between latent (LE) and sensible (H) heat flux. The CLM does not capture the observed decreased daytime LE, and overestimates the increased H during summer. These deficiencies are mainly associated with models' greater biases over forest land-cover types and the parameterization of soil evaporation. Global gridded simulations with the CLM show uncertainties in the estimation of LE and H at the grid level for regional and global simulations. Noah-MP exhibits a similar ability to simulate the surface flux changes, but with larger biases in H, G, and Rnet change during late winter and early spring, which are related to a deficiency in estimating albedo. Differences in meteorological conditions between paired sites is not a factor in these results. Attention needs to be devoted to improving the representation of surface heat flux processes in land models to increase confidence in LULCC simulations. © 2017 Author. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79436
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States; School of Forestry and Environmental Studies, Yale University, New Haven, CT, United States
Recommended Citation:
Chen L,, Dirmeyer P,A,et al. Pairing FLUXNET sites to validate model representations of land-use/land-cover change[J]. Hydrology and Earth System Sciences,2018-01-01,22(1)