Estimation of the contributions of conductance and electric field to the intensity of field-aligned currents in the night polar ionosphere during substorm expansion phase
https://doi.org/10.5800/GT-2019-10-3-0433
Abstract
Based on the output data of the magnetogram inversion technique, we analyze the dynamics of the Pedersen ionospheric currents and field-aligned currents (FACs) in the night mesoscale cells of the three main large-scale Iijima and Potemra Regions (R1, R2 and R0) during the expansion phase of the summer and winter substorms. FACs play a key role in the ionosphere-magnetosphere interaction. The continuity equation for the electric current density contains two types of possible feedback within the electric circuit parts that connect Pedersen currents and FACs in each cell. Pedersen ionospheric conductivity is dominant to Type 1, and the electric field dominates in Type 2 feedback. This paper studies both types of physical feedback in mesoscale cells of downward and upward FACs on the night side of the polar ionosphere from the data of two selected substorms of the summer and winter seasons in the northern hemisphere.
About the Authors
V. V. Mishin
Institute of Solar-Terrestrial Physics, Siberian Branch of RAS
Russian Federation
Russian Federation
Vladimir V. Mishin - Doctor of Physics and Mathematics.
126A Lermontov street, Irkutsk 664033.
S. B. Lunyushkin
Institute of Solar-Terrestrial Physics, Siberian Branch of RAS
Russian Federation
Russian Federation
Sergei B. Lunyushkin.
126A Lermontov street, Irkutsk 664033.
V. M. Mishin
Institute of Solar-Terrestrial Physics, Siberian Branch of RAS
Russian Federation
Russian Federation
Vilen M. Mishin - Doctor of Physics and Mathematics.
126A Lermontov street, Irkutsk 664033.
M. A. Kurikalova
Institute of Solar-Terrestrial Physics, Siberian Branch of RAS
Russian Federation
Russian Federation
Marina A. Kurikalova - Candidate of Physics and Mathematics.
126A Lermontov street, Irkutsk 664033.
Yu. V. Penskikh
Institute of Solar-Terrestrial Physics, Siberian Branch of RAS
Russian Federation
Russian Federation
Yuri V. Penskikh.
126A Lermontov street, Irkutsk 664033.
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Review
For citations:
Mishin V.V., Lunyushkin S.B., Mishin V.M., Kurikalova M.A., Penskikh Yu.V. Estimation of the contributions of conductance and electric field to the intensity of field-aligned currents in the night polar ionosphere during substorm expansion phase. Geodynamics & Tectonophysics. 2019;10(3):663-672. https://doi.org/10.5800/GT-2019-10-3-0433
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