气候变化领域集成服务门户(CCPortal): Soil Evaporation Stress Determines Soil Moisture-Evapotranspiration Coupling Strength in Land Surface Modeling

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DOI	10.1029/2020GL090391
	Soil Evaporation Stress Determines Soil Moisture-Evapotranspiration Coupling Strength in Land Surface Modeling
	Dong J.; Dirmeyer P.A.; Lei F.; Anderson M.C.; Holmes T.R.H.; Hain C.; Crow W.T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	Model-based estimates of soil moisture (SM)-evapotranspiration (ET) coupling strength (ρ) vary widely and are prone to bias. Here we apply numerical modeling and remote sensing to identify the process-level source of modeled ρ bias with the goal of improving the fidelity of current Earth system models. Results illustrate that modeled ρ is most strongly determined by soil evaporation (E) stress, and (generally positive) ρ modeling bias is attributable to the oversimplification of soil texture impacts on E stress. Based on new remotely sensed estimates of ρ, we demonstrate that removing ρ bias via a single optimized E stress parameter leads to improved ET accuracy and resolves a well-known modeling bias in the partitioning of ET into E and T. As such, we highlight the importance of the stress function relating E and SM and its central role in regulating land-atmosphere coupling processes impacting local climate. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Evaporation; Remote sensing; Soil moisture; Textures; Coupling strengths; Earth system model; Land surface modeling; Land-atmosphere couplings; Model-based OPC; Soil evaporations; Stress functions; Stress parameter; Evapotranspiration; accuracy assessment; environmental stress; evaporation; evapotranspiration; land surface; numerical model; optimization; parameter estimation; remote sensing; soil moisture; soil texture
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169535
作者单位	Hydrology and Remote Sensing Laboratory, USDA-ARS, Beltsville, MD, United States; Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States; Geosystems Research Institute, Mississippi State University, Starkville, MS, United States; Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth Science Office, NASA Marshall Space Flight Center, Huntsville, AL, United States
推荐引用方式 GB/T 7714	Dong J.,Dirmeyer P.A.,Lei F.,et al. Soil Evaporation Stress Determines Soil Moisture-Evapotranspiration Coupling Strength in Land Surface Modeling[J],2020,47(21).
APA	Dong J..,Dirmeyer P.A..,Lei F..,Anderson M.C..,Holmes T.R.H..,...&Crow W.T..(2020).Soil Evaporation Stress Determines Soil Moisture-Evapotranspiration Coupling Strength in Land Surface Modeling.Geophysical Research Letters,47(21).
MLA	Dong J.,et al."Soil Evaporation Stress Determines Soil Moisture-Evapotranspiration Coupling Strength in Land Surface Modeling".Geophysical Research Letters 47.21(2020).