Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 28056 10.12737/stp-51201909 Results of current research Results of current research Results of current research Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere https://orcid.org/0000-0003-2184-8089 Гололобов Артем Юрьевич Gololobov Artem Yuryevich golart87@gmail.com

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Голиков Иннокентий Алексеевич Golikov Innokentiy Alekseevich gia2008@mail.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН Якутск Россия Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS Yakutsk Russian Federation Северо-Восточный федеральный университет им. М.К. Аммосова Якутск Россия North-Eastern Federal University Yakutsk Russian Federation Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН Якутск Россия Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS Yakutsk Russian Federation 5 1 62 68 https://naukaru.ru/en/nauka/article/28056/view

The electron temperature enhancement is known to occur in the main ionospheric trough during geomagnetic disturbances. In this paper, we study features of the formation of the electron temperature (Тe) 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.

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.

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

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