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Proceedings Paper

Dynamic processes at the heights of mesosphere-thermosphere at subauroral latitudes of the far-eastern region at low geomagnetic activity
Author(s): Aleksey V. Vinitsky; Valentina V. Kazantseva
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Paper Abstract

According to the observation data of "Magadan" observatory and the measurements of variations of geomagnetic field elements on meridian chain of digital magnetometers, operating under the international program << 21 0 magnetic meridian >>, daily changes of ionospheric parameters and characteristics of geomagnetic field in winter are considered. It was shown, that at low geomagnetic activity the change of state of ionosphere at night reflect variations of electronic concentration at the southern border of the main ionospheric trough. The increase of equivalent height of the lower part of F region, reduction of horizontal component of geomagnetic fields and declination correspond to the evening minimum of electron concentration in the maximum of F2 layer. On auroral latitudes the amplification of the eastern electrojet is usually observed at this time. During formation of near-midnight foF2 maximum an opposite picture of changes of the indicated parameters and amplification of the western electrojet in auroral zone is observed. Destruction of western electrojet corresponds to the morning foF2 minimum. Different influence of the western and eastern electrojets on formation of the main ionospheric trough points to the reorganization of neutral atmosphere due to the Joule heating is not the only reason of its changes.

Paper Details

Date Published: 21 April 2006
PDF: 5 pages
Proc. SPIE 6160, Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 61602Z (21 April 2006); doi: 10.1117/12.675914
Show Author Affiliations
Aleksey V. Vinitsky, Institute of Cosmophysical Research and Radio Wave Propagation (Russia)
Valentina V. Kazantseva, Institute of Cosmophysical Researches and Radio Wave Propagation (Russia)

Published in SPIE Proceedings Vol. 6160:
Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics
Gelii A. Zherebtsov; Gennadii G. Matvienko, Editor(s)

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