Understanding the Role of Saturn's Magnetosphere in Determining the Thermal Structure of Titan's Upper Atmosphere

Details Understanding the Role of Saturn's Magnetosphere in Determining the Thermal Structure of Titan's Upper Atmosphere Understanding the Role of Saturn's Magnetosphere in Determining the Thermal Structure of Titan's Upper Atmosphere

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm21b2012b&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM21B-2012

Physics

[0343] Atmospheric Composition And Structure / Planetary Atmospheres, [2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [5405] Planetary Sciences: Solid Surface Planets / Atmospheres, [6281] Planetary Sciences: Solar System Objects / Titan

Scientific paper

An updated analysis of the Cassini Ion-Neutral Mass Spectrometer data by Westlake et al. [2011] revealed that the temperatures and neutral densities in Titan's upper atmosphere were strongly correlated with the intensity of its plasma environment, as determined by CAPS-ELS and Magnetometer data (Rymer et al. [2009] and Simon et al. [2010]). In this study, we present three-dimensional (3-D) global simulations from the Titan Global Ionosphere-Thermosphere Model (T-GITM) in order to reproduce the INMS data. We investigate to what extent magnetospheric heating is required by the 3-D model in order to accurately reproduce the Cassini INMS data between TA and T40 using T-GITM. Moreover, we examine the simulated thermal structures during different magnetospheric environments: Plasma Sheet, Lobe, and Intermediate. In particular, we examine the impacts of magnetospheric heating on the escape of the major atmospheric species (N2, CH4, and H2).

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