气候变化领域集成服务门户(CCPortal): Improving a Multilevel Turbulence Closure Model for a Shallow Lake in Comparison With Other 1-D Models

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DOI	10.1029/2019MS001971
	Improving a Multilevel Turbulence Closure Model for a Shallow Lake in Comparison With Other 1-D Models
	Sun L.; Liang X.-Z.; Ling T.; Xu M.; Lee X.
发表日期	2020
ISSN	19422466
卷号	12 期号:7
英文摘要	Lakes differ from lands in water availability, heat capacity, albedo, and roughness, which affect local surface-atmospheric interactions. This study modified a multilevel upper ocean model (UOM) for lake applications and evaluated its performance in Lake Taihu (China) with comprehensive measurements against three popular one-dimensional (1-D) lake models. These models were based on different concepts, including the self-similarity (FLake), the wind-driven eddy diffusion (LISSS), the k-ε turbulence closure (SIMSTRAT), and a simplified turbulence closure (UOM). The surface flux scheme in these models was unified to exclude the discrepancies in representing air-lake exchanges. All models in their default formulations presented obvious cold water temperature biases and largely underestimated the lake surface temperature (LST) diurnal range. For each model, these deficiencies were significantly reduced by incorporating new physics schemes or calibrated tunable parameters based on systematic sensitivity tests. The primary modifications for UOM included (1) a new scheme of decreased surface roughness lengths to better characterize the shallow lake, (2) a solar radiation penetration scheme with increased light extinction coefficient and surface absorption fraction to account for the high water turbidity, and (3) turbulent Prandtl number increased by a factor of 20 to reduce the turbulent vertical mixing. All other models were improved in these three aspects (roughness, extinction, and mixing) within their original formulations. Given these improvements, UOM showed superior performance to other models in capturing LST diurnal cycle and daily to seasonal variations, as well as summer-autumn vertical stratification changes. The new UOM is well suited for application in shallow lakes. ©2020. The Authors.
语种	英语
scopus关键词	Light extinction; Mixing; Prandtl number; Solar radiation; Specific heat; Surface roughness; Turbulence; Water absorption; Cold water temperatures; Comprehensive measurement; Lake surface temperature; Light extinction coefficients; Surface roughness length; Turbulence closure models; Turbulent Prandtl number; Vertical stratification; Lakes; air-water interaction; cold water; lacustrine environment; model; seasonal variation; stratification; surface flux; surface temperature; water temperature; China; Taihu Lake
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/156698
作者单位	Climate, Environment and Sustainability Center, School of Atmosphere Science, Nanjing University of Information Science and Technology, Nanjing, China; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States; Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Center, Beijing, China; Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, United States; School of Forestry and Environmental Studies, Yale University, New Haven, CT, United States
推荐引用方式 GB/T 7714	Sun L.,Liang X.-Z.,Ling T.,et al. Improving a Multilevel Turbulence Closure Model for a Shallow Lake in Comparison With Other 1-D Models[J],2020,12(7).
APA	Sun L.,Liang X.-Z.,Ling T.,Xu M.,&Lee X..(2020).Improving a Multilevel Turbulence Closure Model for a Shallow Lake in Comparison With Other 1-D Models.Journal of Advances in Modeling Earth Systems,12(7).
MLA	Sun L.,et al."Improving a Multilevel Turbulence Closure Model for a Shallow Lake in Comparison With Other 1-D Models".Journal of Advances in Modeling Earth Systems 12.7(2020).