MGCM simulations of the 2001 Mars global dust storm using synthesized MGS dust opacity

Details MGCM simulations of the 2001 Mars global dust storm using synthesized MGS dust opacity MGCM simulations of the 2001 Mars global dust storm using synthesized MGS dust opacity

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p11a1254n&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P11A-1254

Physics

3346 Planetary Meteorology (5445, 5739)

Scientific paper

We have synthesized all available Mars Global Surveyor (MGS) observations of the 2001 global dust storm on Mars in order to produce the best possible description of the evolution of column optical depth and active dust lifting regions. MGS data include MOC daily global weather maps, MOC dust (visible) optical depth measurements, TES measurements of atmospheric temperature and 9-micron dust opacity, and MHSA measurements of middle atmosphere temperatures. Together these allow for the juxtaposition of temperature and opacity fields with visual imagery to enable a more comprehensive assessment of storm development. Known limitations of TES observations result in significant spatial gaps in data, especially at high latitudes and in regions with very high dust opacity. NASA/NOAA Mars General Circulation Model (MGCM) simulations of the storm using synthesized opacity datasets will be presented. We have found that allowing the MGCM to self-consistently advect a radiatively active dust distribution, suitably constrained by the observed column opacity, allows a realistic simulation of the atmospheric temperature evolution. The Hadley circulations and the thermal tides play a prominant role in structuring the aerosol field.

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