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Modeling the Dust Cycle on Mars With the Global Mars Multiscale Model GEM-Mars

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dc.contributor.advisor Taylor, Peter
dc.creator Wu, Di
dc.date.accessioned 2016-09-20T16:31:01Z
dc.date.available 2016-09-20T16:31:01Z
dc.date.copyright 2015-09-18
dc.date.issued 2016-09-20
dc.identifier.uri http://hdl.handle.net/10315/32131
dc.description.abstract The Mars atmosphere General Circulation Model GEM-Mars developed at York University has been used to simulate the dust cycle on Mars. The dynamic core is based on the Canadian operational weather forecast Global Environmental Multiscale NWP Model (GEM 3.3.0). Both dust devils and wind shear lifting schemes are included in the model. The wind shear scheme was modified from the terrestrial Dust Entrainment And Deposition (DEAD) model. This study has explored the two dust lifting schemes, dust radiative transfer, dust dry deposition, and other physical schemes, such as CO2 thermal infrared transfer, CO2 near-infrared absorption, UV-EUV heating, surface force-restore method, turbulence and diffusion, and CO2 condensation schemes. The expanded model has successfully simulated Mars dust cycles in a spontaneous and self-consistent way. Our results agree with observations that: during the perihelion season (roughly southern spring and summer, solar insulation is stronger) the Martian atmosphere is relatively warm and dusty, and during the aphelion season it is relatively cool with less dust. The simulated dust vertical distributions and atmospheric temperatures are generally consistent with the MCS and Phoenix observations. The two dust lifting schemes both contribute to atmospheric dust loading with mechanical lifting scheme triggering dust storms while dust devils keep the atmospheric dust background. However, our simulated dust storms show a regular variability with time and locations every Mars year without inter-annual variability.
dc.language.iso en
dc.rights Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subject Meteorology
dc.title Modeling the Dust Cycle on Mars With the Global Mars Multiscale Model GEM-Mars
dc.type Electronic Thesis or Dissertation
dc.degree.discipline Earth & Space Science
dc.degree.name PhD - Doctor of Philosophy
dc.degree.level Doctoral
dc.date.updated 2016-09-20T16:31:00Z
dc.subject.keywords Dust cycle
dc.subject.keywords Climate model
dc.subject.keywords Atmospheric Modeling
dc.subject.keywords Climate on Mars
dc.subject.keywords Aerosols radiative effects
dc.subject.keywords Radiative transfer
dc.subject.keywords CO2 cycle
dc.subject.keywords Turbulence and diffusion

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