A 3-D Chemistry Transport Model for Titan's Thermosphere

Details A 3-D Chemistry Transport Model for Titan's Thermosphere A 3-D Chemistry Transport Model for Titan's Thermosphere

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p21a1336d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P21A-1336

Physics

0343 Planetary Atmospheres (5210, 5405, 5704), 5405 Atmospheres (0343, 1060), 6281 Titan

Scientific paper

MOZART-2 (Horowitz et al., 2003) has been adapted to investigate seasonal and diurnal differences in neutral composition in Titan's atmosphere between the surface and 1,200 km altitude. The chemical scheme with 64 solution species and 383 reactions is based on a simplified version of the Lavvas et al. (2008) scheme, without haze production. Wind and temperature fields were taken from the Cologne GCM (Tokano, 2007) or TitanWRF (Richardson et al., 2007) for the troposphere and stratosphere, and from the London TGCM (Mueller-Wodarg, 2000) for the thermosphere. Pronounced hemispheric concentration gradients develop in the thermosphere, and a strong diurnal cycle in composition is found, similar to the findings of Mueller-Wodarg (2003) for methane. Sensitivity experiments with different strengths of thermospheric circulation to account for uncertainty about the wind fields in that region are presented.

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