Computer Science
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...71..313b&link_type=abstract
(NASA, Lunar and Planetary Institute, and National Air and Space Museum, MECA Conference on Mars: The Evolution of Its Climate a
Computer Science
20
Dynamic Models, Mars Atmosphere, Mars Surface, Planetary Waves, Polar Caps, Atmospheric Circulation, Atmospheric Temperature, Dust Storms, Stratospheric Warming, Viking Mars Program, Winter
Scientific paper
The mechanisms involved in the global dust storm and polar warming seen in the Martian atmosphere by the Viking IRTM during the winter solstice of 1977 are investigated theoretically by means of numerical simulations. A two-component dynamical model (based on the combined action of a zonally symmetric 'Hadley' circulation at low and middle latitudes and a planetary-wave circulation at middle and high latitudes) is constructed by analogy to the model of Holton and Mass (1976) for terrestrial sudden stratospheric warmings. The Viking data and simulation results are presented in extensive graphs and characterized in detail. It is demonstrated that a planetary-wave mechanism, based primarily on wavenumber 1 and including a high degree of topographical or thermal wave forcing, can reproduce the observed polar warming. The roles of radiative damping, dissipation, and the transport of dust and water are explored.
Barnes Jeffrey R.
Hollingsworth Jeffery L.
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