Comparison of Wind Directions Observed on Mars with those Predicted by the NASA Ames Mars General Circulation Model

Details Comparison of Wind Directions Observed on Mars with those Predicted by the NASA Ames Mars General Circulation Model Comparison of Wind Directions Observed on Mars with those Predicted by the NASA Ames Mars General Circulation Model

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004dps....36.4109a&link_type=abstract

American Astronomical Society, DPS meeting #36, #41.09; Bulletin of the American Astronomical Society, Vol. 36, p.1171

Astronomy and Astrophysics

Astronomy

Scientific paper

The NASA Ames Mars General Circulation Model (GCM) simulates the dynamics of Mars' atmosphere including prevailing wind patterns. Studies of observed cloud formations, as visible indicators of wind patterns, can serve as a validation of martian wind patterns predicted by the model. Leewave cloud formations associated with craters observed in images of Mars taken by the Mars Orbiter Camera (MOC), were analyzed using ISIS (Integrated Software for Imagers and Spectrometers, USGS) to determine the direction of the prevailing winds responsible for forming those leewaves. The Mars GCM was then used to generate a predicted wind direction at each crater given its location (lat/lon), season of occurence, and assuming cloud altitudes of 1-15 kilometers at 1-3 pm local time. The wind directions calculated from ISIS data were compared to the theoretical values for wind direction generated by the GCM at corresponding locations and season. Good correlation was found between the wind directions predicted by the GCM and the wind directions calculated based on observed leewaves. In most cases, differences in wind directions between the model and observations are less than 30°.

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