气候变化领域集成服务门户(CCPortal): Impact of Lateral Flow on Surface Water and Energy Budgets Over the Southern Great Plains

CCPortal

DOI	10.1029/2020JD033659
	Impact of Lateral Flow on Surface Water and Energy Budgets Over the Southern Great Plains—A Modeling Study
	Yang Z.; Huang M.; Berg L.K.; Qian Y.; Gustafson W.I.; Fang Y.; Liu Y.; Fast J.D.; Sakaguchi K.; Tai S.-L.
发表日期	2021
ISSN	2169897X
卷号	126 期号:12
英文摘要	As the horizontal grid spacing decreases, treatment of hydrologic processes in land surface models (LSMs), such as the lateral flow of surface and subsurface flow, need to be explicitly represented. Unlike previous studies that mainly focused on the mountainous regions, in this study, the offline Weather Research and Forecasting (WRF)-Hydro model is employed to study the impact of lateral flow on soil moisture and energy fluxes over the relatively flat southern Great Plains (SGP). The vast amount of measurements over the SGP provide a unique opportunity to assess the model behavior. In addition, newly developed land surface properties and input forcing are ingested into the model, in an attempt to reduce uncertainties associated with the initial and boundary forcing and help to identify model deficiencies. Our results show that the more realistic inputs (parameters, soil types, forcing) lead to larger underestimation of latent heat flux and dry bias, indicating the existence of model structural uncertainty (embedded errors) in WRF-Hydro that need to be characterized to inform future model development efforts. Including lateral flow processes partly mitigates the model deficiencies in representing hydrologic processes and alleviates the dry bias. In particular, both surface and subsurface lateral flow increase soil moisture mainly over the lower elevations, except that subsurface flow also affects soil moisture over steeper terrains. Additional simulations are performed to assess the effect of routing resolution on model results. When LSM resolution is high, noticeable differences in soil moisture are produced between different routing resolutions especially over steep terrain. Whereas when LSM resolution is coarse, differences between routing resolutions become negligible, especially over flat terrain. © 2021. American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	land-atmosphere interaction; lateral flow; subsurface runoff; surface runoff; WRF-Hydro
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185130
作者单位	Pacific Northwest National Laboratory, Richland, WA, United States; Office of Science and Technology Integration, National Weather Service, National Oceanic and Atmospheric Administration, Silver Spring, MD, United States; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States
推荐引用方式 GB/T 7714	Yang Z.,Huang M.,Berg L.K.,等. Impact of Lateral Flow on Surface Water and Energy Budgets Over the Southern Great Plains—A Modeling Study[J],2021,126(12).
APA	Yang Z..,Huang M..,Berg L.K..,Qian Y..,Gustafson W.I..,...&Tai S.-L..(2021).Impact of Lateral Flow on Surface Water and Energy Budgets Over the Southern Great Plains—A Modeling Study.Journal of Geophysical Research: Atmospheres,126(12).
MLA	Yang Z.,et al."Impact of Lateral Flow on Surface Water and Energy Budgets Over the Southern Great Plains—A Modeling Study".Journal of Geophysical Research: Atmospheres 126.12(2021).