Midlatitude disturbances in the Martian atmosphere - A second Mars year

Mathematics – Logic

Scientific paper

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Atmospheric Circulation, Baroclinic Waves, Mars Atmosphere, Meteorological Parameters, Midlatitude Atmosphere, Planetary Meteorology, Viking Lander 2, Annual Variations, Atmospheric Pressure, Atmospheric Temperature, Phase Velocity, Power Spectra, Spectrum Analysis, Wind Variations, Mars, Atmosphere, Viking 2 Lander, Viking Mission, Meteorology, Spectrum, Analysis, Pressure, Wind, Temperatures, Baroclinity, Wavelengths, Data, Amplitude, Phases, Frequency, Dust Storms

Scientific paper

Time spectral and cross-spectral analyses of Viking Lander 2 meteorological data from the fall and winter seasons of a second Mars annual cycle were conducted to determine transient disturbance characteristics with periods longer than a Martian day. It was found that phase relationships among pressure, wind, and temperature oscillations are similar to those of the first year, and consistent with the expected eastward baroclinic waves centered north of the Lander 2 site. Composites constructed for two highly regular subperiods show no evidence of sharp frontal structures, though pressure and temperature waves are clearly asymmetric, and estimates of wavenumbers and phase speeds are found to be in agreement with those obtained from the spectral analysis.

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