The chemical composition of the dust-free Martian atmosphere - Preliminary results of a two-dimensional model

Details The chemical composition of the dust-free Martian atmosphere - Preliminary results of a two-dimensional model The chemical composition of the dust-free Martian atmosphere - Preliminary results of a two-dimensional model

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.7933m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, May 10, 1991, p. 7933-7945.

Physics

20

Atmospheric Chemistry, Atmospheric Composition, Atmospheric Models, Mars Atmosphere, Two Dimensional Models, Atmospheric Circulation, Atmospheric Radiation

Scientific paper

This paper describes a two-dimensional model of the Martian atmosphere, in which chemical, radiative and dynamical processes are treated interactively. The model is developed for a carbon dioxide-hydrogen-oxygen-nitrogen atmosphere and provides estimates of concentrations for 19 chemical species. The dynamical equations are expressed in the transformed Eulerian coordinates. The wave driving and eddy mixing coefficients resulting from gravity and Rossby wave absorption are computed consistently with the evolving distribution of the mean zonal wind. The net diabatic heating/cooling rate is derived from a detailed radiative scheme including the contributions of CO2, O3, H2O and O2, and is computed consistently with the calculated distribution of temperature and trace species quantities. The computed temperature field as well as the meridional and seasonal variations of ozone column abundance are in good agreement with the distributions observed by Mariner 9 and Viking spacecrafts and the results obtained by previous studies. The present version of the model does not include the effects of dust, clouds and polar hood and only the chemistry in a dust-free atmosphere is considered.

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