Computer Science
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29...21s&link_type=abstract
Planetary and Space Science, vol. 29, Jan. 1981, p. 21-33.
Computer Science
16
Annual Variations, Atmospheric Chemistry, Atmospheric Composition, Atmospheric Models, Mars Atmosphere, Ozonometry, Diurnal Variations, Photochemical Reactions, Photodissociation, Solar Radiation, Surface Temperature, Time Dependence, Water Vapor
Scientific paper
Temporal variations of the ozone density profile in the Martian atmosphere at high latitudes are calculated for the course of a Martian year, taking into account seasonal and diurnal variations in temperature, water vapor and solar radiation. Calculations are based on a model including 35 neutral photochemical reactions, and vertical eddy diffusion using a time step of 12 min for the region from the surface to 240 km altitude. Results are found to be in better agreement with Mariner 9 observations of the time and magnitude of the seasonal maximum than previous model calculations. The diurnal variation is predicted to be small near the solstices, with the nighttime ozone density greater than the daytime and the magnitude of the difference dependent on season. Opposite temporal variations are predicted for ozone densities above and below about 25 km, and an ozone density maximum at 35-40 km is obtained. It is suggested that the effects of an aerosol layer may not be important in enhancing predicted ozone concentration, and may even decrease it.
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