Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992p%26ss...40..941d&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 40, no. 7, July 1992, p. 941-952.
Physics
16
Electric Field Strength, Equatorial Atmosphere, Field Aligned Currents, Ionospheric Currents, Ionospheric Disturbances, Magnetic Storms, Annual Variations, Auroral Zones, Boundary Value Problems
Scientific paper
Numerical simulations and data analysis are employed to demonstrate the feasibility of a large electric-field penetration at low latitudes including the equator. The ionosphere is modeled as a global conductor, and specific attention is given to the synchronous variations of electric fields and currents at high and low latitudes. The model developed describes field-aligned currents and conductivities for the expansion and recovery phases of a substorm in a manner that is consistent with the theory of field-aligned current dynamics. Electric-field distributions are calculated for the equatorial region based on the model, and the results are found to agree with substorm observational data. The significant influence of high latitude sources on the dynamics of electric fields in the equatorial ionosphere is confirmed by the present model and calculations.
Denisenko V. V.
Zamai S. S.
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