Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.2416b&link_type=abstract
American Astronomical Society, DPS meeting #39, #24.16; Bulletin of the American Astronomical Society, Vol. 39, p.457
Astronomy and Astrophysics
Astronomy
Scientific paper
Atmospheric temperatures retrieved at several pressure levels from MGS-TES radiance data in the 15 μm CO2 band exhibit quasi-periodic variations with amplitudes as much as ±5 K and wavelengths on the order of 15 - 20 km along ground tracks over three craters (Holden, Eberswalde, and Terby) that have large-amplitude relief. By contrast, temperatures retrieved along a ground track over a region with low relief exhibited variations on the order of ±1 K or less. This is suggestive of gravity waves induced by atmospheric flow over the underlying terrain. If they are terrain-induced gravity waves, and if we assume the flow is parallel to the south-north ground track, their wavelengths imply meridional wind speeds v ≤ ±20 m s-1 near the surface. If the flow is at an oblique angle to the ground track, the implied wind speeds are considerably smaller.
Bergstralh Jay T.
Natarajan Murali
Tolson Robert H.
Zawodny Joseph M.
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