A Look at Dust Storms on Mars (2007 To 2009) Using MCS and THEMIS Observations

Details A Look at Dust Storms on Mars (2007 To 2009) Using MCS and THEMIS Observations A Look at Dust Storms on Mars (2007 To 2009) Using MCS and THEMIS Observations

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.4902f&link_type=abstract

American Astronomical Society, DPS meeting #41, #49.02

Computer Science

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Martian dust storms may be small, localised and short lived or can be large and intense and expand to enshroud most, if not all, of the planet within a few days. The martian dusty season occurs near the time of perihelion (closest approach to the sun) during Mars' southern hemisphere spring and summer. During this period (+/- 90 degrees Ls of perihelion) local and regional dust storms are more frequent and there is a higher probability of a major and possible planet-encircling dust storm occuring. Despite this there is still a lot of interannual variability and uncertainty regarding the occurence of both major and regional dust storms.
The Mars Climate Sounder (MCS) instrument onboard NASA's Mars Reconnaissance Orbiter (MRO) is a two telescope 9 channel filter IR radiometer (0.3 to 45 microns), with each channel consisting of a linear array of 21 detectors. Each pixel sounds a 5km thick region of the Martian atmosphere in a limb viewing/scanning mode.
We present a comparison of dust storm activity on Mars for 2007 to 2009 using MCS limb observations of changes in dust opacity. These measurements are also compared with observations and atmospheric opacity maps generated by the Thermal Emission Imaging System (THEMIS) multi-wavelength instrument onboard the Mars Odyssey spacecraft and Mars weather maps from MRO's Mars Color Imager (MARCI) for this period. Model predictions from the Mars Climate Database and simulations from the UK Mars General Circulation Model (GCM) are also used.
This comparison gives us an empirical method for using MCS data directly to identify dust storm activity during this period.

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