Global Ionosphere Thermosphere Model results of the Halloween Storm

Details Global Ionosphere Thermosphere Model results of the Halloween Storm Global Ionosphere Thermosphere Model results of the Halloween Storm

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa13a0270r&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA13A-0270

Physics

0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition (3369), 2431 Ionosphere/Magnetosphere Interactions (2736), 2447 Modeling And Forecasting

Scientific paper

The Global Ionosphere Thermosphere Model (GITM) is a new code for examining the upper atmosphere of the Earth. GITM has a flexible grid structure, doesn't assume a hydrostatic equilibrium, and allows a wide variety of ionospheric and thermospheric physics to be easily investigated. We have modeled the October 29-31, 2003 storms with GITM numerous times, to investigate the effects of different processes on the thermosphere and ionosphere. Specifically, we have modified the solar EUV inputs using modeled and measured values as inputs to the model; used empirical and specified high latitude drivers; changed the resolution of the model; and modified the eddy diffusion thermal conduction term. In addition, we have removed the non-hydrostatic forcing from the code (i.e. vertical ion drag, vertical Coriolis, and non-uniform gravity) term by term to determine the effects of enforcing a hydrostatic condition on the thermosphere. We compare model results to the mass density derived from CHAMP accelerometer data and Millstone Hill measurements of the electron density.

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