Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p13d..05b&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #P13D-05
Physics
[0355] Atmospheric Composition And Structure / Thermosphere: Composition And Chemistry, [3367] Atmospheric Processes / Theoretical Modeling, [3369] Atmospheric Processes / Thermospheric Dynamics, [6281] Planetary Sciences: Solar System Objects / Titan
Scientific paper
The general circulation of the atmosphere can have a significant impact on the escape of species from the upper atmospheres of planets (cf. Hartle and Mayer [1976]). Recently, Bell et al. [2009] used a one-dimensional (1-D) model to constrain mass loss rates from Titan’s upper atmosphere for both CH4 and H2. We report on the impacts of the 3-D circulation of Titan on the estimated escape fluxes of nitrogen, methane, and hydrogen. We present two scenarios for CH4 escape from Titan’s upper atmosphere: (1) a hydrodynamic escape scenario (Strobel [2009]) and (2) a low escape scenario (Bell et al [2009]). The composition, dynamics, and energetics of these two configurations will be discussed within the context of recent INMS measurements in the thermosphere and recent magnetospheric carbon ion measurements.
Bell James M.
Gell David
Magee Brian A.
Mandt Kathleen E.
Waite H. Jr. J..
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