Validation studies of turbulence closure schemes for high resolutions in mesoscale meteorological models

Mesoscale models are often used to reproduce the atmospheric processes at relatively high resolutions, both for meteorological and pollutant dispersion studies and applications. Particularly in non-homogeneous conditions, a proper description of turbulent transport is a fundamental aspect. In this w...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2006-05, Vol.40 (14), p.2510-2523
Main Authors: Trini Castelli, S., Hara, T., Ohba, R., Tremback, C.J.
Format: Article
Language:English
Subjects:
Earth, ocean, space
Exact sciences and technology
Experimental campaign
External geophysics
Mesoscale models
Meteorology
Non-homogenous conditions
RAMS
Turbulence closures
Weather analysis and prediction
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Summary:Mesoscale models are often used to reproduce the atmospheric processes at relatively high resolutions, both for meteorological and pollutant dispersion studies and applications. Particularly in non-homogeneous conditions, a proper description of turbulent transport is a fundamental aspect. In this work, we compare two analogous 1.5-order turbulence schemes implemented in RAMS, mainly differing in the form of the turbulent kinetic energy dynamical equation (1D or 3D) and in the relationships linking the closure quantities, such as diffusion coefficients and dissipation terms. We present results from simulations performed in a simple, idealized case, along with results related to two field campaigns carried on in the Tsukuba region (Japan) in 1989 and 1990. Both turbulence schemes are able to well reproduce the mean flow, but different performances are related to the turbulence field.
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2005.12.028