Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa42a..06a&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA42A-06
Physics
[2439] Ionosphere / Ionospheric Irregularities, [2447] Ionosphere / Modeling And Forecasting
Scientific paper
A three-dimensional numerical simulation of plasma density irregularities in the postsunset equatorial F region ionosphere leading to equatorial spread F (ESF) is described. The simulation advances the plasma number density and electrostatic potential forward in time by enforcing the constraints of quasineutrality and momentum conservation for atomic and molecular species. The magnetic field lines are not modeled as equipotentials. Simulations are performed incorporating realistic background circulation including bottomside shear flow and strong vertical current. Generalized Rayleigh Taylor instability is found to combine with collisional shear instability to produce growing waveforms with characteristics that match observations more closely than either instability acting alone. The growth rate of the emergent instability, its mixing depth, and its overall morphology are compared with radar data from Jicamarca and Kwajalein.
Aveiro H. C.
Hysell Dave L.
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