Physics
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994p%26ss...42..825c&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 42, no. 10, p. 825-830
Physics
1
Atmospheric Diffusion, Atmospheric Turbulence, Gravity Waves, Isotopic Labeling, Mars (Planet), Mars Atmosphere, Ozone, Atmospheric Models, Photochemical Reactions, Two Dimensional Models
Scientific paper
A link is established between the vertical structure of the eddy diffusion coefficient and the shape of the ozone profile in the middle atmosphere of Mars. By using a 2-D model of the effect of internal gravity waves on the general circulation pattern the eddy diffusion coefficient K is calculated as a function of altitude in solstitial conditions for various latitudes covering polar, mid-latitude and equatorial regions. The vertical profile of K is mainly characterized by a steep increase with altitude above a typical level of approximately equals 40 km, in the region of the atmosphere where breaking waves are expected to release their energy. By using a 1-D steady state photochemical model which is proven to provide a realtistic diurnal profile of ozone, it is shown that the enhanced vertical transport in the breaking region results in the formation of a thin ozone layer whose contrast is well correlated with the altitude of the breaking level. This correlation is quantitatively analyzed and discussed in view of future observations of ozone by solar and stellar occultation for the Mars 94 spacecraft.
Chassefiere Eric
Rosenqvist Jan
Theodore Bertrand
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