气候变化领域集成服务门户(CCPortal): Pairing FLUXNET sites to validate model representations of land-use/land-cover change

CCPortal

DOI	10.5194/hess-22-111-2018
	Pairing FLUXNET sites to validate model representations of land-use/land-cover change
	Chen L.; Dirmeyer P.A.; Guo Z.; Schultz N.M.
发表日期	2018
ISSN	1027-5606
起始页码	111
结束页码	125
卷号	22 期号:1
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.
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
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160160
作者单位	Chen, L., Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States; Dirmeyer, P.A., Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States; Guo, Z., Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States; Schultz, N.M., School of Forestry and Environmental Studies, Yale University, New Haven, CT, United States
推荐引用方式 GB/T 7714	Chen L.,Dirmeyer P.A.,Guo Z.,et al. Pairing FLUXNET sites to validate model representations of land-use/land-cover change[J],2018,22(1).
APA	Chen L.,Dirmeyer P.A.,Guo Z.,&Schultz N.M..(2018).Pairing FLUXNET sites to validate model representations of land-use/land-cover change.Hydrology and Earth System Sciences,22(1).
MLA	Chen L.,et al."Pairing FLUXNET sites to validate model representations of land-use/land-cover change".Hydrology and Earth System Sciences 22.1(2018).