Computer Science – Sound
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa22a0105b&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SA22A-0105
Computer Science
Sound
2431 Ionosphere/Magnetosphere Interactions (2736), 2447 Modeling And Forecasting, 2481 Topside Ionosphere, 2704 Auroral Phenomena (2407)
Scientific paper
We review substantial recent developments to the CTIP coupled thermosphere-ionosphere-plasmasphere model, using observations from the Aberystwyth ionospheric tomographic imaging chain and the IMAGE satellite to benchmark and validate the model results. Thermospheric heating in auroral regions has classically been viewed as a combination of Joule Heating (macroscopic frictional heating from the ionosphere), Lorentz forcing (microscopic momentum transfer from ions) and particle precipitation. Of these, it has been shown that above about 110 km, Joule Heating is the dominant energy transfer mechanism. However, ion velocities during disturbed times often approach or exceed the neutral sound speed. We investigate shock front heating through modelling using the improved CTIP model and compare these with in-situ satellite observation. We conclude that shock heating may be a significant contribution to the auroral thermosphere-ionosphere energy balance.
Balthazor Richard L.
Denton Michael H.
Pryse Eleri
Thom Stuart
Wilford C.
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