Computer Science
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978kosis..16..434k&link_type=abstract
Kosmicheskie Issledovaniia, vol. 16, May-June 1978, p. 434-442. In Russian.
Computer Science
Atmospheric Composition, Atmospheric Models, Diurnal Variations, Mars Atmosphere, Atmospheric Moisture, Atmospheric Temperature, Carbon Monoxide, Eddy Viscosity, Oxygen Atoms, Ozone, Planetary Ionospheres, Vertical Distribution
Scientific paper
Diurnal variations in the composition of the Martian atmosphere from the planet's surface to a height of 250 km are calculated in the framework of a spatially uniform time-dependent model. Experimentally and theoretically established diurnal temperature and humidity variations are taken into account in the analysis. It is found that there are practically no diurnal variations in carbon monoxide and atomic oxygen at heights corresponding to the ionospheric maximum (130 to 150 km) and that the computed concentrations of carbon monoxide and atomic oxygen at these heights are in agreement with experimental data for an eddy viscosity of 30 million sq cm/sec. The atomic hydrogen concentration at the exobase level is shown to experience significant diurnal variations, reaching a maximum at 10:00 a.m. and a minimum at midnight. The results also indicate that the ozone content of the Martian atmosphere varies by a factor of approximately 2 during the diurnal cycle, with minima occurring at sunrise and sunset and maxima occurring at noon and during the night. The model predicts a pronounced minimum in atomic oxygen content at a height of 39 km and a secondary maximum at 32 km, both during the morning hours.
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