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Estimation of turbulence dissipation rate from Doppler wind lidars and in-situ instrumentation in the Perdigão 2017 campaign

Wildmann, Norman and Bodini, Nicola and Lundquist, Julie K. and Bariteau, Ludovic and Wagner, Johannes (2019) Estimation of turbulence dissipation rate from Doppler wind lidars and in-situ instrumentation in the Perdigão 2017 campaign. Atmospheric Measurement Techniques, 2019 (12), pp. 6401-6423. Copernicus Publications. DOI: 10.5194/amt-12-6401-2019 ISSN 1867-1381

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Official URL: https://www.atmos-meas-tech.net/12/6401/2019/

Abstract

The understanding of the sources, spatial distribution and temporal variability of turbulence in the atmospheric boundary layer, and improved simulation of its forcing processes require observations in a broad range of terrain types and atmospheric conditions. In this study, we estimate turbulence kinetic energy dissipation rate ε using multiple techniques, including in situ measurements of sonic anemometers on meteorological towers, a hot-wire anemometer on a tethered lifting system and remote-sensing retrievals from a vertically staring lidar and two lidars performing range–height indicator (RHI) scans. For the retrieval of ε from the lidar RHI scans, we introduce a modification of the Doppler spectral width method. This method uses spatiotemporal averages of the variance in the line-of-sight velocity and the turbulent broadening of the Doppler backscatter spectrum. We validate this method against the observations from the other instruments, also including uncertainty estimations for each method. The synthesis of the results from all instruments enables a detailed analysis of the spatial and temporal variability in ε across a valley between two parallel ridges at the Perdigão 2017 campaign. We analyze in detail how ε varies in the night from 13 to 14 June 2017. We find that the shear zones above and below a nighttime low-level jet experience turbulence enhancements. We also show that turbulence in the valley, approximately 11 rotor diameters downstream of an operating wind turbine, is still significantly enhanced by the wind turbine wake.

Item URL in elib:https://elib.dlr.de/130356/
Document Type:Article
Title:Estimation of turbulence dissipation rate from Doppler wind lidars and in-situ instrumentation in the Perdigão 2017 campaign
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wildmann, NormanDLR, IPAhttps://orcid.org/0000-0001-9475-4206
Bodini, NicolaUniversity of Colorado Boulder, Boulder, Colorado, USAhttps://orcid.org/0000-0002-2550-9853
Lundquist, Julie K.University of Colorado Boulder, Boulder, Colorado, USAhttps://orcid.org/0000-0001-5490-2702
Bariteau, LudovicCooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, Colorado, USAUNSPECIFIED
Wagner, JohannesDLR, IPAUNSPECIFIED
Date:5 December 2019
Journal or Publication Title:Atmospheric Measurement Techniques
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:2019
DOI :10.5194/amt-12-6401-2019
Page Range:pp. 6401-6423
Publisher:Copernicus Publications
ISSN:1867-1381
Status:Published
Keywords:Lidar, Turbulence, Wind Energy, Complex Terrain, Perdigão 2017
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Wildmann, Norman
Deposited On:20 Nov 2019 07:14
Last Modified:10 Dec 2019 09:03

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