gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2019-10-3-0433gtcrust-894Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSОЦЕНКА ВКЛАДОВ ПРОВОДИМОСТИ И ЭЛЕКТРИЧЕСКОГО ПОЛЯ В ИНТЕНСИВНОСТЬ ПРОДОЛЬНЫХ ТОКОВ В НОЧНОЙ ПОЛЯРНОЙ ИОНОСФЕРЕ ВО ВРЕМЯ ВЗРЫВНОЙ ФАЗЫ СУББУРИESTIMATION OF THE CONTRIBUTIONS OF CONDUCTANCE AND ELECTRIC FIELD TO THE INTENSITY OF FIELD-ALIGNED CURRENTS IN THE NIGHT POLAR IONOSPHERE DURING SUBSTORM EXPANSION PHASEhttps://orcid.org/0000-0002-2729-2862МишинВ. В.MishinV. V.

Мишин Владимир Виленович - доктор физико-математических наук.

664033, Иркутск, ул. Лермонтова, 126A.

Vladimir V. Mishin - Doctor of Physics and Mathematics.

126A Lermontov street, Irkutsk 664033.

vladm@iszf.irk.ruhttps://orcid.org/0000-0003-0474-1079ЛунюшкинС. Б.LunyushkinS. B.

Лунюшкин Сергей Брониславович.

664033, Иркутск, ул. Лермонтова, 126A.

Sergei B. Lunyushkin.

126A Lermontov street, Irkutsk 664033.

Lunyushkin@iszf.irk.ruhttps://orcid.org/0000-0001-7782-2107МишинВ. М.MishinV. M.

Мишин Вилен Моисеевич - доктор физико-математических наук.

664033, Иркутск, ул. Лермонтова, 126A.

Vilen M. Mishin - Doctor of Physics and Mathematics.

126A Lermontov street, Irkutsk 664033.

mishin@iszf.irk.ruhttps://orcid.org/0000-0002-0710-8917КурикаловаМ. А.KurikalovaM. A.

Курикалова Марина Александровна - кандидат физико-математических наук.

664033, Иркутск, ул. Лермонтова, 126A.

Marina A. Kurikalova - Candidate of Physics and Mathematics.

126A Lermontov street, Irkutsk 664033.

kurikalova@iszf.irk.ruПенскихЮ. В.PenskikhYu. V.

Пенских Юрий Владимирович.

664033, Иркутск, ул. Лермонтова, 126A.

Yuri V. Penskikh.

126A Lermontov street, Irkutsk 664033.

penskikh@iszf.irk.ruИнститут солнечно-земной физики СО РАНРоссияInstitute of Solar-Terrestrial Physics, Siberian Branch of RASRussian Federation201915092019103663672Copyright © Мишин В.В., Лунюшкин С.Б., Мишин В.М., Курикалова М.А., Пенских Ю.В., 20192019Мишин В.В., Лунюшкин С.Б., Мишин В.М., Курикалова М.А., Пенских Ю.В.Mishin V.V., Lunyushkin S.B., Mishin V.M., Kurikalova M.A., Penskikh Y.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/894

На основе выходных данных техники инверсии магнитограмм выполнен анализ динамики интенсивности ионосферных токов Педерсена и продольных токов в ночных мезомасштабных ячейках трех основных крупномасштабных зон (1, 2 и 0) Ииджимы и Потемры во время взрывной фазы летней и зимней суббурь. Продольные токи играют ключевую роль в ионосферно-магнитосферном взаимодействии. Уравнение непрерывности плотности электрического тока содержит два типа возможной обратной связи на участках электрической цепи, соединяющих в каждой ячейке токи Педерсена и продольные токи. Ионосферная проводимость Педерсена является основной для Типа 1, а в обратной связи Типа 2 доминирует электрическое поле. В работе исследуются оба типа физической обратной связи в мезомасштабных ячейках втекающих и вытекающих продольных токов на ночной стороне полярной ионосферы по данным двух избранных суббурь летнего и зимнего сезонов в Северном полушарии.

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.

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The authors declare that there are no conflicts of interest present.