Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere

Artem Gololobov; Innokentiy Golikov

doi:10.12737/szf-51201909

UDC 55

INVESTIGATING SEASONAL FEATURES OF ELECTRON TEMPERATURE ENHANCEMENT REGIONS IN THE SUBAURORAL IONOSPHERE Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere

АА Аа

Published in Solnechno-Zemnaya Fizika · Volume 5, Issue 1 · Pages 82–89 · Rubric: Results of current research

DOI: https://doi.org/10.12737/szf-51201909

Received: 16.08.2018 Accepted: 16.03.2026 Language of publication: RUS

Authors

Artem Gololobov

ORCID

Innokentiy Golikov

Artem Gololobov

Academic degree: candidate of physical and mathematical sciences

Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS Russian Federation · Yakutsk

North-Eastern Federal University docent · Russian Federation · Yakutsk

ORCID

Innokentiy Golikov

Academic degree: doctor of physical and mathematical sciences

Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS Russian Federation · Yakutsk

ABSTRACT

The electron temperature enhancement is known to occur in the main ionospheric trough during geomagnetic disturbances. In this paper, we study fea-tures of the formation of the electron temperature (Te) enhancement in the subauroral ionosphere by comparing results of the numerical simulation with measurements of Te onboard the CHAMP satellite under moderate geomagnetic activity conditions. It is shown that depending on the terminator position and universal time (UT), the location of the enhanced Te regions in the subauroral ionosphere varies in different seasons. So, in winter ring-shaped and sickle-shaped regions can be formed, whereas during the equinox and summer periods sickle-shaped regions of different lengths and clarity are generally observed.

KEYWORDS

subauroral ionosphere, numerical model, electron temperature enhancement, seasonal features, ring current, ring-shaped and sickle-shaped regions, CHAMP

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ВВЕДЕНИЕ

В работах [Brace et al., 1982; Kofman, 1984; Prölls, 2006] по экспериментальным данным были обнаружены эффекты повышения температуры электронов в субавроральной ионосфере. В работе [Prölls, 2006] по данным спутника DE-2 исследовано повышение температуры электронов Te в субавроральной ионосфере. Установлено, что область повышения T_eпространственно совпадает с положением главного ионосферного провала (ГИП). Численному моделированию теплового режима высокоширотной ионосферы, включая субавроральную, посвящен ряд работ [Клименко и др., 1991; Мингалева, Мингалев, 1992; David et al., 2011; Mingaleva, Mingalev, 1996; Prölls, 2006; Schunk et al., 1986], в которых изучены причины формирования областей с повышенными температурами. Показано, что повышения Te связаны с нисходящими потоками тепла, электрическими полями и пониженными значениями концентрации электронов ne в области ГИП. В [Бюхнер и др., 1983; Крымский, 1990; Cole, 1965; Prölls, 2006] сделано предположение, что возможной причиной повышения T_e в субавроральной ионосфере может быть кольцевой ток, который возрастает в периоды возмущений. Тепло, генерируемое частицами кольцевого тока на высотах нескольких радиусов Земли, за счет высокой теплопроводности электронного газа может передаваться вниз вдоль силовых линий геомагнитного поля на высоты F-слоя ионосферы, приводя к повышению T_e.

Целью настоящей работы является исследование особенностей формирования областей повышения Te в субавроральной ионосфере в разные сезоны с помощью численной модели высокоширотной ионосферы и данных ИСЗ CHAMP.

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Geliy Zherebtsov

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Deputy Editor-in-Chief

Alexander Potapov

potapov@iszf.irk.ru

Executive Secretary of Editorial Board

Natalia Polyushkina

npol@iszf.irk.ru

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Gololobov A. Y., Golikov I. A. Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere // Solnechno-Zemnaya Fizika. 2018. no. 1. pp. 82-89. DOI: https://doi.org/10.12737/szf-51201909. (Date of access 28.09.2026).

MLA

Artem Gololobov, Golikov I. A.. "Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere." Solnechno-Zemnaya Fizika 5.1 (2018): 82-89. DOI: https://doi.org/10.12737/szf-51201909.

APA

Gololobov A. Y., Golikov I. A. (2018). Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere. Solnechno-Zemnaya Fizika, 5(1), 82-89. https://doi.org/10.12737/szf-51201909

Chicago

Artem Gololobov, Golikov I. A.. "Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere." Solnechno-Zemnaya Fizika 5, no. 1 (2018): 82-89. https://doi.org/10.12737/szf-51201909.

WIKI

{{cite journal | author = Gololobov A. Y., Golikov I. A. | title = Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere | journal = Solnechno-Zemnaya Fizika | year = 2018 | volume = 5 | issue = 1 | pages = 82-89 | doi = 10.12737/szf-51201909 }}

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INVESTIGATING SEASONAL FEATURES OF ELECTRON TEMPERATURE ENHANCEMENT REGIONS IN THE SUBAURORAL IONOSPHERE Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere

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