A spectral model of the atmospheric general circulation of Mars - A numerical experiment including the effects of the suspended dust and the topography

Physics

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Atmospheric Circulation, Atmospheric Models, Dust Storms, Mars Atmosphere, Topography, Atmospheric Heating, Atmospheric Temperature, Mars Surface, Mathematical Models, Radiative Transfer, Wind Velocity, Mars, Mathematical Models, Spectrum, Atmosphere, Circulation, Data, Experiments, Dust Storms, Topography, Scattering, Wind Velocity, Parameters, Particles, Radiative Transfer, Distribution, Infrared, Wavelengths, Pressure, Energy, Temperatures, Injections, Amplitude, Oscillations, Diurnal Variations, Regions

Scientific paper

A numerical experiment of the Martian atmospheric general circulation was performed by using a spectral three-level linear-balance model. The effects of topography and of radiative scattering of dust suspended in the Martian atmosphere upon the general circulation were examined. Results indicate that in the stage of development of a dust storm, topography, when it exists in the dusty field, would have an important role for intensifying winds and suspending dust particles blown up from the surfaces in a region such as the Hellas. Also thermally forced transient waves produced by radiative effect of dust are superposed on the quasistationary disturbances induced by the topography. As a result, large coupled oscillations appear in the atmosphere having the predominant components of wave number 1 and 2.

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