Ozone and photochemistry of the Martian lower atmosphere

Physics

Scientific paper

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Atmospheric Chemistry, Lower Atmosphere, Mars Atmosphere, Ozone, Photochemical Reactions, Carbon Monoxide, Oxygen, Photolysis, Water Vapor, Mars, Atmosphere, Ozone, Photochemistry, Nitrogen, Water, Mars 5, Carbon Dioxide, Ultraviolet, Oxygen, Carbon Monoxide, Toposphere, Photometry, Water Vapor, Ice, Aerosols, Hypotheses, Photolysis

Scientific paper

The calculation of number densities of CO2, H2O and N2 photolysis products was carried out for the Martian atmosphere at heights up to 60 km. The ozone distributed in the atmosphere as a layer of 10 km width with a maximum concentration of 2.5 x 10 to the 9th cu cm at height of 35 km, which agree well with the results of UV observations on the evening terminator from the Mars-5 satellite. The calculated densities of O2, CO and H2O are also in good agreement with the measured data. The eddy diffusion coefficient is equal to 3 x 10 to the 6th sq cm/sec in the troposphere and 10 to the 8th sq cm/sec above 40 km. The dependence of the total ozone content on water vapor amount in the atmosphere is considered; the hypothesis about the influence of water ice aerosol on the ozone formation is proposed to explain the high concentrations of ozone in the morning.

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