Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa43a1884v&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA43A-1884
Physics
[2407] Ionosphere / Auroral Ionosphere, [2487] Ionosphere / Wave Propagation
Scientific paper
It is well known that modulated heating of the ionospheric plasma by high-frequency (HF) radio waves creates electron temperature perturbations that can act as sources of magnetohydrodynamic (MHD) waves at the modulation frequency. Despite several important works on the subject, a self-consistent picture of ionospheric heating and the subsequent generation and propagation of MHD waves has yet to be considered. In this work we present a model of underdense HF heating of the auroral ionosphere and the subsequent generation and propagation of MHD waves. The model presented here is composed of two stages. Initially an HF heating equation with collisional and transport losses is numerically solved to yield a temporal electron temperature profile caused by the underdense modulated heating. This electron temperature profile is then fed as a source into a 2D MHD model, which computes the propagation of the waves, their penetration to the ground, and their injection to the magnetosphere. The results are tested against experimental observations.
Eliasson Baldur
Milikh Gennady M.
Papadopoulos Konstantinos
Shao Xiaofeng
Vartanyan A.
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