Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa42a..04k&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA42A-04
Physics
[2411] Ionosphere / Electric Fields, [2435] Ionosphere / Ionospheric Disturbances, [2439] Ionosphere / Ionospheric Irregularities
Scientific paper
The Naval Research Laboratory three-dimensional simulation code SAMI3/ESF is used to study the response of a post-sunset model ionosphere to model electrified medium-scale traveling ionospheric disturbances (MSTIDs) propagating at a height of 300 km and located between 4 and 16 degrees latitude and -3 to 3 degrees longitude. An MSTID, often attributed to a Perkins-type plasma instability, is here modeled as an externally-imposed traveling-wave E field with wavelength 250 km and period 1 h that drives vertical E x B drifts of up to 50 m/s. We find that the coupling between the MSTID at low to mid latitudes and the F layer at the equator leads to growth of equatorial plasma bubbles (EPBs). This coupling is strongest when the wave vector is perpendicular to the geomagnetic Field. Model results reproduce key features of observed MSTIDs and associated EPBs.
Huba Joseph D.
Joyce G. R.
Krall Jonathan
Makela Jarmo
Miller Ethan S.
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