Computer Science
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jats...41.1461p&link_type=abstract
Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 41, April 15, 1984, p. 1461-1473. Research supported by the Science a
Computer Science
4
Atmospheric Circulation, Internal Waves, Mars Atmosphere, Atmospheric Models, Australia, Mars Photographs, Northern Hemisphere, Solitary Waves, Spring (Season), Viking Orbiter Spacecraft, Mars, Tharsis Region, Comparisons, Atmosphere, Seasonal Variations, Waves, Observations, Theoretical Studies, Amplitude, Procedure, Analysis, Density, Decay, Layers, Depth, Velocity, Calculations, Pavonis Mons, Boundaries, Gradients, Winds
Scientific paper
A phenomenon which has appeared in the Martian atmosphere during three Northern Hemisphere springs and early summers has been termed the Martian bore wave; it resembles an atmospheric undular bore of the type observed in the terrestrial atmosphere. This paper examines three of these observations, two resembling a wave train and one a solitary wave. A comparison is made with the Morning Glory of the Gulf of Carpentaria and the solitary wave in the arid interior of Australia, both of which have been identified as internal undular bores. The Martian waves are investigated using a theoretical treatment of a class of long internal waves of permanent form with finite amplitude. It is assumed that the density of the atmosphere decays exponentially with height in a layer of depth h, nearest the ground in which the air velocity has a linear profile. Calculations show that to the south of Pavonis Mons, in a region of strong boundary layer velocity gradients associated with katabatic drainage winds, the phase speed c of the clouds associated with these waves is related to the upper layer velocity U(bar) by (c - U/bar/)/Nh much less than 1 for Brunt-Vaisala frequency N in the boundary layer.
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