气候变化领域集成服务门户(CCPortal): Improving Representation of Deforestation Effects on Evapotranspiration in the E3SM Land Model

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DOI	10.1029/2018MS001551
	Improving Representation of Deforestation Effects on Evapotranspiration in the E3SM Land Model
	Cai X.; Riley W.J.; Zhu Q.; Tang J.; Zeng Z.; Bisht G.; Randerson J.T.
发表日期	2019
ISSN	19422466
起始页码	2412
结束页码	2427
卷号	11 期号:8
英文摘要	Evapotranspiration (ET) plays an important role in land-atmosphere coupling of energy, water, and carbon cycles. Following deforestation, ET is typically observed to decrease substantially as a consequence of decreases in leaf area and roots and increases in runoff. Changes in ET (latent heat flux) revise the surface energy and water budgets, which further affects large-scale atmospheric dynamics and feeds back positively or negatively to long-term forest sustainability. In this study, we used observations from a recent synthesis of 29 pairs of adjacent intact and deforested FLUXNET sites to improve model parameterization of stomatal characteristics, photosynthesis, and soil water dynamics in version 1 of the Energy Exascale Earth System Model (E3SM) Land Model (ELMv1). We found that default ELMv1 predicts an increase in ET after deforestation, likely leading to incorrect estimates of the effects of deforestation on land-atmosphere coupling. The calibrated model accurately represented the FLUXNET observed deforestation effects on ET. Importantly, the search for global optimal parameters converged at values consistent with recent observational syntheses, confirming the reliability of the calibrated physical parameters. Applying this improved model parameterization to the globe scale reduced the bias of annual ET simulation by up to ~600 mm/year. Analysis on the roles of parameters suggested that future model development to improve ET simulation should focus on stomatal resistance and soil water-related parameterizations. Finally, our predicted differences in seasonal ET changes from deforestation are large enough to substantially affect land-atmosphere coupling and should be considered in such studies. © 2019. The Authors.
英文关键词	climate effects; deforestation; E3SM; Earth system model; evapotranspiration; land use and land cover
语种	英语
scopus关键词	Budget control; Deforestation; Earth (planet); Evapotranspiration; Heat flux; Land use; Parameterization; Soil moisture; Atmospheric dynamics; Climate effects; E3SM; Earth system model; Forest sustainability; Land use and land cover; Land-atmosphere couplings; Model parameterization; Climate models; atmospheric dynamics; calibration; climate effect; deforestation; evapotranspiration; flux measurement; land cover; land use; land-atmosphere interaction; latent heat flux; numerical model; parameter estimation; parameterization; soil water; surface energy
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156881
作者单位	Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; School of Environment Science and Engineering, Southern University of Science and Technology, Shenzhen, China; Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, United States; Department of Earth System Science, University of California, Irvine, CA, United States
推荐引用方式 GB/T 7714	Cai X.,Riley W.J.,Zhu Q.,et al. Improving Representation of Deforestation Effects on Evapotranspiration in the E3SM Land Model[J],2019,11(8).
APA	Cai X..,Riley W.J..,Zhu Q..,Tang J..,Zeng Z..,...&Randerson J.T..(2019).Improving Representation of Deforestation Effects on Evapotranspiration in the E3SM Land Model.Journal of Advances in Modeling Earth Systems,11(8).
MLA	Cai X.,et al."Improving Representation of Deforestation Effects on Evapotranspiration in the E3SM Land Model".Journal of Advances in Modeling Earth Systems 11.8(2019).