Studying the dynamics of electric currents and polar caps in ionospheres of two hemispheres during the August 17, 2001 geomagnetic storm

Studying the dynamics of electric currents and polar caps in ionospheres of two hemispheres during the August 17, 2001 geomagnetic storm

Автор: Lunyushkin S.B., Mishin V.V., Karavaev Yu.A., Penskikh Yu.V., Kapustin V.E.

Журнал: Солнечно-земная физика @solnechno-zemnaya-fizika

Статья в выпуске: 2 т.5, 2019 года.

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The magnetogram inversion technique (MIT), developed at ISTP SB RAS more than forty years ago, has been used until recently only in the Northern Hemisphere. In recent years, MIT has been improved and extended to make instantaneous calculations of 2D distributions of electric fields, horizontal and field-aligned currents in two polar ionospheres. The calculations were carried out based on one-minute ground-based geomagnetic measurements from the worldwide network of stations in both hemispheres (SuperMAG). In this paper, this extended technique is used in the approximation of uniform ionospheric conductance and is applied for the first time to calculations of equivalent and field-aligned currents in two hemispheres through the example of the August 17, 2001 geomagnetic storm. We have obtained the main and essential result: the advanced MIT-ISTP can calculate large-scale distributions of ionospheric convection and FACs in the Northern (N) and Southern (S) polar ionospheres with a high degree of expected hemispheric similarity between these distributions...

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Current function, ionospheric convection, polar cap, auroral electrojets, field-aligned currents, magnetic storms and substorms, dawn-dusk asymmetry, interhemispheric asymmetry

Короткий адрес: https://sciup.org/142220331

IDR: 142220331   |   DOI: 10.12737/szf-52201903

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