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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Volume 8, issue 10
Geosci. Model Dev., 8, 3393-3419, 2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Geosci. Model Dev., 8, 3393-3419, 2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Development and technical paper 28 Oct 2015

Development and technical paper | 28 Oct 2015

Influence of grid aspect ratio on planetary boundary layer turbulence in large-eddy simulations

S. Nishizawa et al.
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Cited articles  
Beljaars, A. C. M. and Holtslag, A. A. M.: Flux parameterization over land surfaces for atmospheric models, J. Appl. Meteorol., 30, 327–341, 1991.
Black, T. L.: The new NMC mesoscale Eta model: Description and forecast examples, Weather Forecast., 9, 265–278, 1994.
Brown, A. R., Derbyshire, S. H., and Mason, P. J.: Large-eddy simulation of stable atmospheric boundary layers with a revised stochastic subgrid model, Q. J. Roy. Meteor. Soc., 120, 1485–1512, 1994.
Deardorff, J. W.: On the magnitude of the subgrid scale eddy coefficient, J. Comput. Phys., 7, 120–133, 1971.
Deardorff, J. W.: Stratocumulus-capped mixed layers derived from a three-dimensional model, Bound.-Lay. Meteorol., 18, 495–527, 1980.
Publications Copernicus
Short summary
The influence of the large grid aspect ratio of horizontal to vertical grid spacing traditionally used in meteorological large-eddy simulations on simulated turbulence is investigated with a series of sensitivity tests with various grid configurations. We confirmed that the grid aspect ratio should be taken into account in the sub-grid scale model to reproduce the theoretical energy spectrum. We also found that the grid aspect ratio has an influence on the turbulent statistics.
The influence of the large grid aspect ratio of horizontal to vertical grid spacing...