Computer Science – Sound
Scientific paper
Jan 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgre..108.5004h&link_type=abstract
Journal of Geophysical Research (Planets), Volume 108, Issue E1, pp. 4-1, CiteID 5004, DOI 10.1029/2002JE001949
Computer Science
Sound
14
Planetary Sciences: Meteorology (3346), Planetary Sciences: Atmospheres-Structure And Dynamics, Meteorology And Atmospheric Dynamics: Planetary Meteorology (5445, 5739), Planetology: Solar System Objects: Mars, Radio Science: Remote Sensing
Scientific paper
We report new observations of stationary planetary waves in the Southern Hemisphere of Mars by Mars Global Surveyor (MGS). We focus on a period during midwinter (Ls = 134°-160°) when independent observations were acquired by two techniques. Radio occultation experiments sounded the atmosphere at essentially fixed latitude (~68°S) and local time (~1030), yielding profiles of geopotential and temperature between the surface and the 9 Pa pressure level. Observations by the Thermal Emission Spectrometer (TES) included systematic limb sounding at nine discrete latitudes and two local times (~0200 and ~1500), yielding temperature profiles at pressures of 1-100 Pa. We supplemented these data with a simulation by a Mars general circulation model (MGCM), which provides an accurate synthesis of the observations. These stationary planetary waves have significant amplitudes at zonal wave numbers s = 1 and 2. The s = 1 component propagates vertically, as reflected by a westward tilt with increasing height in the geopotential and temperature fields and a net poleward eddy heat flux. The peak amplitude at s = 1 is ~1 km in geopotential height and ~7 K in temperature. The geopotential field of the s = 2 component is ``barotropic'' in character, which results through hydrostatic balance in a distinctive temperature field. The peak amplitude at s = 2 is ~700 m in geopotential height and 4-6 K in temperature.
Conrath Barney J.
Hinson David P.
Smith Masson D.
Wilson Richard J.
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