Physics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988p%26ss...36..125l&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 36, Feb. 1988, p. 125-144. Research supported by the U.S. National Research C
Physics
21
Abundance, Atmospheric Chemistry, Dust, Mars Atmosphere, Ozone, Aeronomy, Opacity, Photochemical Reactions, Photodissociation, Polar Regions, Reaction Kinetics, Mars, Ozone, Clouds, Dust, Atmosphere, Photochemistry, Polar Regions, Latitude, Abundance, Opacity, Photodissociation, Absorption, Aeronomy, Seasonal Variations, Reflectance, Spectroscopy, Models, Scattering, Spacecraft Observations, Mariner 9 Mission
Scientific paper
Photochemistry in the winter polar atmosphere of Mars is examined for several latitudes, cloud types and dust abundances. Variations in cloud opacities and cloud types change O3 abundances only a few percent. However, typical dust abundances induce 10 - 50% increases in O3 abundances, primarily because photodissociation rates are drastically reduced by dust absorption. Furthermore, annual, latitudinal and seasonal cycles in dust opacity cause variations of 50% or greater in the corresponding cycles in O3 abundances. The reflectance spectroscopy technique that has been used to measure the O3 abundance may have difficulty detecting these variations.
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