Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa23b1482v&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SA23B-1482
Physics
[2411] Ionosphere / Electric Fields, [2437] Ionosphere / Ionospheric Dynamics
Scientific paper
It is well-known that Earth’s magnetic field plays a vital role in determining the electrodynamics of the ionosphere. It has been observed that many ionospheric parameters such as electric fields, ExB drifts, etc. exhibit longitudinal variability. Using the Global Ionosphere- Thermosphere Model (GITM), we investigate the effect of the Earth’s magnetic field geometry on the zonal variation of the ionospheric electrodynamics. For this purpose we employ three types of geomagnetic field geometries, namely: (i) a simple dipole at the center of the earth with its axis along Earth’s spin axis, (ii) a tilted dipole axis, such that the dipole and rotational axis have a specified angle between them and (iii) an tilted offset dipole axis, such that the dipole is both tilted away from the rotational axis and the location of the dipole center is not at the center of the Earth. The differences noted in the various features of the ionospheric electrodynamics using GITM simulations with different field geometries will be presented in this study.
Ridley Aaron J.
Vichare G. H.
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