Physics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.1528a&link_type=abstract
Journal of Geophysical Research, vol. 87, Mar. 1, 1982, p. 1528-1534.
Physics
19
Atmospheric Models, Auroral Arcs, Magnetic Flux, Cross Sections, Current Sheets, Earth Magnetosphere, Electric Fields, Three Dimensional Models, Two Dimensional Models
Scientific paper
Existing two-dimensional models are probably inadequate, if discrete arcs and inverted Vs are associated with current sheets and the U-shaped electric potential structure. It is hypothesized that the strong, north-south polarization currents occurring as the plasma enters and leaves the arms of the U determine the north-south thickness. Three representative three-dimensional models are considered, in which the current sheets are either tangential or rotational discontinuities modified by the U-shaped potential structure. Thicknesses of the order of a few tens of kilometers are obtained, and the occurrence and type of discontinuity expected at various locations in the magnetosphere are considered. Rotational and tangential discontinuities might be expected at those locations in the magnetosphere where adjacent flux tubes have undergone different histories.
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