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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
https://doi.org/10.5194/gmd-8-3393-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Geosci. Model Dev., 8, 3393-3419, 2015
https://doi.org/10.5194/gmd-8-3393-2015
© 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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Beljaars, A. C. M. and Holtslag, A. A. M.: Flux parameterization over land surfaces for atmospheric models, J. Appl. Meteorol., 30, 327–341, 1991.
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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...
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