The results of some experiments on convection by surface heating in a simple numerical model for small-scale processes in the dry atmosphere
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Author list: Sornkaew P., Exell R.H.B., Humphries U.W.
Publisher: Hikari
Publication year: 2010
Journal: Applied Mathematical Sciences (1312-885X)
Volume number: 4
Issue number: 49-52
Start page: 2521
End page: 2534
Number of pages: 14
ISSN: 1312-885X
Languages: English-Great Britain (EN-GB)
Abstract
The model described in this paper represents the flow of dry air in one horizontal dimension of domain length 64 km and the vertical dimension of height 16 km (the height of the tropopause in tropical latitudes). The model equations are forecast equations for the density, the wind, the vertical velocity and the temperature. The horizontal and vertical resolutions are 2 km and 500 m respectively. Predictions through time are by the leapfrog method over two time steps. Four experiments tested the convective circulations and temperature perturbations produced by a heat-island in the middle of the domain with and without cooling each side of the heated interval and the effects of using Euler and Matsuno starting steps. All four experiments gave similar results.
Keywords
Euler starting step, Matsuno starting step, Numerical Atmospheric Model
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