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Title: Sensitivity of turbine-height wind speeds to parameters in planetary boundary-layer and surface-layer schemes in the weather research and forecasting model

We evaluate the sensitivity of simulated turbine-height wind speeds to 26 parameters within the Mellor–Yamada–Nakanishi–Niino (MYNN) planetary boundary-layer scheme and MM5 surface-layer scheme of the Weather Research and Forecasting model over an area of complex terrain. An efficient sampling algorithm and generalized linear model are used to explore the multiple-dimensional parameter space and quantify the parametric sensitivity of simulated turbine-height wind speeds. The results indicate that most of the variability in the ensemble simulations is due to parameters related to the dissipation of turbulent kinetic energy (TKE), Prandtl number, turbulent length scales, surface roughness, and the von Kármán constant. The parameter associated with the TKE dissipation rate is found to be most important, and a larger dissipation rate produces larger hub-height wind speeds. A larger Prandtl number results in smaller nighttime wind speeds. Increasing surface roughness reduces the frequencies of both extremely weak and strong airflows, implying a reduction in the variability of wind speed. All of the above parameters significantly affect the vertical profiles of wind speed and the magnitude of wind shear. Lastly, the relative contributions of individual parameters are found to be dependent on both the terrain slope and atmospheric stability.
Authors:
 [1] ;  [2] ; ORCiD logo [2] ;  [2] ;  [3] ;  [3] ;  [2] ;  [2] ;  [2]
  1. Nanjing Univ., Nanjing (China); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-675703
Journal ID: ISSN 0006-8314
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Boundary-Layer Meteorology
Additional Journal Information:
Journal Volume: 162; Journal Issue: 1; Journal ID: ISSN 0006-8314
Publisher:
Springer
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; parametrization schemes; parametric sensitivity; planetary boundary layer; surface layer; turbine-height wind speed; weather research and forecasting model
OSTI Identifier:
1342994

Yang, Ben, Qian, Yun, Berg, Larry K., Ma, Po -Lun, Wharton, Sonia, Bulaevskaya, Vera, Yan, Huiping, Hou, Zhangshuan, and Shaw, William J.. Sensitivity of turbine-height wind speeds to parameters in planetary boundary-layer and surface-layer schemes in the weather research and forecasting model. United States: N. p., Web. doi:10.1007/s10546-016-0185-2.
Yang, Ben, Qian, Yun, Berg, Larry K., Ma, Po -Lun, Wharton, Sonia, Bulaevskaya, Vera, Yan, Huiping, Hou, Zhangshuan, & Shaw, William J.. Sensitivity of turbine-height wind speeds to parameters in planetary boundary-layer and surface-layer schemes in the weather research and forecasting model. United States. doi:10.1007/s10546-016-0185-2.
Yang, Ben, Qian, Yun, Berg, Larry K., Ma, Po -Lun, Wharton, Sonia, Bulaevskaya, Vera, Yan, Huiping, Hou, Zhangshuan, and Shaw, William J.. 2016. "Sensitivity of turbine-height wind speeds to parameters in planetary boundary-layer and surface-layer schemes in the weather research and forecasting model". United States. doi:10.1007/s10546-016-0185-2. https://www.osti.gov/servlets/purl/1342994.
@article{osti_1342994,
title = {Sensitivity of turbine-height wind speeds to parameters in planetary boundary-layer and surface-layer schemes in the weather research and forecasting model},
author = {Yang, Ben and Qian, Yun and Berg, Larry K. and Ma, Po -Lun and Wharton, Sonia and Bulaevskaya, Vera and Yan, Huiping and Hou, Zhangshuan and Shaw, William J.},
abstractNote = {We evaluate the sensitivity of simulated turbine-height wind speeds to 26 parameters within the Mellor–Yamada–Nakanishi–Niino (MYNN) planetary boundary-layer scheme and MM5 surface-layer scheme of the Weather Research and Forecasting model over an area of complex terrain. An efficient sampling algorithm and generalized linear model are used to explore the multiple-dimensional parameter space and quantify the parametric sensitivity of simulated turbine-height wind speeds. The results indicate that most of the variability in the ensemble simulations is due to parameters related to the dissipation of turbulent kinetic energy (TKE), Prandtl number, turbulent length scales, surface roughness, and the von Kármán constant. The parameter associated with the TKE dissipation rate is found to be most important, and a larger dissipation rate produces larger hub-height wind speeds. A larger Prandtl number results in smaller nighttime wind speeds. Increasing surface roughness reduces the frequencies of both extremely weak and strong airflows, implying a reduction in the variability of wind speed. All of the above parameters significantly affect the vertical profiles of wind speed and the magnitude of wind shear. Lastly, the relative contributions of individual parameters are found to be dependent on both the terrain slope and atmospheric stability.},
doi = {10.1007/s10546-016-0185-2},
journal = {Boundary-Layer Meteorology},
number = 1,
volume = 162,
place = {United States},
year = {2016},
month = {7}
}