Physics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9621071s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Dec. 1, 1991, p. 21,071-21,085.
Physics
22
Auroras, Birkeland Currents, Equipotentials, Ohms Law, Tropical Regions, Current Distribution, Differential Equations, Electric Fields, Mathematical Models, Viscosity
Scientific paper
The 1D distributed region 1 and current model of Lotko et al. (1987) is combined with the 2D distributed region 2 current model of Vasyliunas (1972) to produce the first model to distribute both region 1 and region 2 currents in two dimensions (no sheet currents) and to calculate both currents mutually consistently from a single applied transpolar potential. The solutions give ionospheric equipotentials and electric field profiles for all local times and latitudes and Birkeland current contours and profiles everywhere within the auroral annulus. The Birkeland current contours comprise a symmetrical pair of spirals unwinding counterclockwise with region 0, 1, and 2 segments. The model predictions are compared with DE 2 data with noted points of agreement and disagreement. Steps needed to develop the model further are listed.
Maynard Nelson
Siscoe George
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