气候变化领域集成服务门户(CCPortal): Spatial and temporal variability of turbulence dissipation rate in complex terrain

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DOI	10.5194/acp-19-4367-2019
	Spatial and temporal variability of turbulence dissipation rate in complex terrain
	Bodini N.; Lundquist J.K.; Krishnamurthy R.; Pekour M.; Berg L.K.; Choukulkar A.
发表日期	2019
ISSN	16807316
起始页码	4367
结束页码	4382
卷号	19 期号:7
英文摘要	To improve parameterizations of the turbulence dissipation rate (ϵ) in numerical weather prediction models, the temporal and spatial variability of ϵ must be assessed. In this study, we explore influences on the variability of ϵ at various scales in the Columbia River Gorge during the WFIP2 field experiment between 2015 and 2017. We calculate ϵ from five sonic anemometers all deployed in a ∼ 4 km2 area as well as from two scanning Doppler lidars and four profiling Doppler lidars, whose locations span a ∼ 300 km wide region.We retrieve ϵ from the sonic anemometers using the second-order structure function method, from the scanning lidars with the azimuth structure function approach, and from the profiling lidars with a novel technique using the variance of the line-of-sight velocity. The turbulence dissipation rate shows large spatial variability, even at the microscale, especially during nighttime stable conditions. Orographic features have a strong impact on the variability of ϵ, with the correlation between ϵ at different stations being highly influenced by terrain. ϵ shows larger values in sites located downwind of complex orographic structures or in wind farm wakes. A clear diurnal cycle in ϵ is found, with daytime convective conditions determining values over an order of magnitude higher than nighttime stable conditions. ϵ also shows a distinct seasonal cycle, with differences greater than an order of magnitude between average ϵ values in summer and winter. © 2019 Author(s).
语种	英语
scopus关键词	complex terrain; convective system; Doppler lidar; orographic effect; spatiotemporal analysis; summer; turbulence; weather forecasting; winter; Columbia River Gorge; Oregon; United States
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144513
作者单位	Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; National Renewable Energy Laboratory, Golden, CO, United States; University of Notre Dame, Notre Dame, IN, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States
推荐引用方式 GB/T 7714	Bodini N.,Lundquist J.K.,Krishnamurthy R.,et al. Spatial and temporal variability of turbulence dissipation rate in complex terrain[J],2019,19(7).
APA	Bodini N.,Lundquist J.K.,Krishnamurthy R.,Pekour M.,Berg L.K.,&Choukulkar A..(2019).Spatial and temporal variability of turbulence dissipation rate in complex terrain.Atmospheric Chemistry and Physics,19(7).
MLA	Bodini N.,et al."Spatial and temporal variability of turbulence dissipation rate in complex terrain".Atmospheric Chemistry and Physics 19.7(2019).