Simulations of the general circulation of the Martian atmosphere. II - Seasonal pressure variations

Details Simulations of the general circulation of the Martian atmosphere. II - Seasonal pressure variations Simulations of the general circulation of the Martian atmosphere. II - Seasonal pressure variations

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.3149p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E2, p. 3149-3181.

Physics

38

Annual Variations, Atmospheric General Circulation Models, Atmospheric Pressure, Carbon Dioxide Concentration, Mars Atmosphere, Dust Storms, Polar Caps, Mars, Simulations, Circulation, Atmosphere, Seasonal Variations, Cycles, Surface, Carbon Dioxide, Energy, Dynamics, Radiation, Ice, Boundaries, Heating, Condensation, Parameters, Landing Sites, Albedo, Emissivity, Deposits, Advection, Experiments, Numerical Methods, Conduction, Model, Weather, Storms, Polar Caps, Calculations, Optical Properties, Depth

Scientific paper

The CO2 seasonal cycle of the Martian atmosphere and surface is simulated with a hybrid energy balance model that incorporates dynamical and radiation information from a large number of general circulation model runs. This information includes: heating due to atmospheric heat advection, the seasonally varying ratio of the surface pressure at the two Viking landing sites to the globally averaged pressure, the rate of CO2 condensation in the atmosphere, and solar heating of the atmosphere and surface. The predictions of the energy balance model are compared with the seasonal pressure variations measured at the two Viking landing sites and the springtime retreat of the seasonal polar cap boundaries. The following quantities are found to have a strong influence on the seasonal pressures at the Viking landing sites: albedo of the seasonal CO2 ice deposits, emissivity of this deposit, atmospheric heat advection, and the pressure ratio.

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