Estimation of turbulence dissipation rate and its variability from sonic anemometer and wind Doppler lidar during the XPIA field campaign [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 621.45 Wind engines

Thông tin xuất bản: Richland, Wash. : Oak Ridge, Tenn. : Pacific Northwest National Laboratory (U.S.) ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2018

Mô tả vật lý: Size: p. 4291-4308 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 257273

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 Abstract.<
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  Despite turbulence being a fundamental transport process in the boundary layer, the capability of current numerical models to represent it is undermined by the limits of the adopted assumptions, notably that of local equilibrium. Here we leverage the potential of extensive observations in determining the variability in turbulence dissipation rate (<
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 ). These observations can provide insights towards the understanding of the scales at which the major assumption of local equilibrium between generation and dissipation of turbulence is invalid. Typically, observations of <
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  require time- and labor-intensive measurements from sonic and/or hot-wire anemometers. We explore the capability of wind Doppler lidars to provide measurements of <
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 . We refine and extend an existing method to accommodate different atmospheric stability conditions. To validate our approach, we estimate <
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  from four wind Doppler lidars during the 3-month XPIA campaign at the Boulder Atmospheric Observatory (Colorado), and we assess the uncertainty of the proposed method by data intercomparison with sonic anemometer measurements of <
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 . Our analysis of this extensive dataset provides understanding of the climatology of turbulence dissipation over the course of the campaign. Further, the variability in <
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  with atmospheric stability, height, and wind speed is also assessed. Finally, we present how <
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  increases as nocturnal turbulence is generated during low-level jet events.<
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