Dry and moist idealized experiments with a two-dimensional spectral element model
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Authors
Gaberšek, Saša
Giraldo, Francis X.
Doyle, James D.
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NUMA2D
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Date of Issue
2011
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Abstract
Two dimensional idealized dry and moist numerical simulations are performed and analyzed with a nonhydrostatic, fully compressible spectral element model. The dry numerical tests 4 consist of a linear hydrostatic mountain wave and a squall line is the basis for the moist simulations. A desired spatial accuracy with a spectral element model is determined by two 6 parameters, a number of elements (h) and a polynomial order (p) of the basis functions. In this paper, the range of average horizontal resolution varies from 0.2 km to 10 km. 8 Dry experiments are compared to an analytic solution for accuracy. It is found that the nominal resolution ( x) of less than 2 km is su cient to minimize the error, while resolutions 10 of 500 m or less show no additional error reduction and are computationally expensive. When compared at a similar spatial resolution, the computational cost of the spectral element model 12 compared to a
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Article
Description
Non-hydrostatic Unified Model of the Atmosphere (NUMA)
The first NUMA papers appeared in 2008. From 2008 through 2010, all the NUMA papers appearing involved the 2D (x-z slice) Euler equations. All the theory and numerical implementations were first developed in 2D.
The first NUMA papers appeared in 2008. From 2008 through 2010, all the NUMA papers appearing involved the 2D (x-z slice) Euler equations. All the theory and numerical implementations were first developed in 2D.
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Applied Mathematics
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.