Wave activity in the ionosphere during the geospace storm of November 7-10, 2004.

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Bibliographic Details
Title:	Wave activity in the ionosphere during the geospace storm of November 7-10, 2004.
Authors:	Burmaka, V. P.¹, Chernogor, L. F.²
Source:	Geomagnetism & Aeronomy. Jun2011, Vol. 51 Issue 3, p305-320. 16p. 2 Charts, 11 Graphs.
Subject Terms:	Electrons, Ionosphere, Ionospheric storms, Geomagnetism, *Atmospheric electricity
Abstract:	This paper presents the results of studies of wave disturbances in the electron concentration N in the ionosphere during a prominent geospace storm, in the process of which the electron concentration decreased by a factor of 6-7, whereas the temperatures of ions and electrons at night increased up to 2000 and 3000 K, respectively. The height-time variations in the parameters of wave disturbances are also analyzed. It is shown that the geospace storm was accompanied by a substantial change in wave activity in the ionosphere. In the period of negative ionospheric storms, the amplitude Δ decreased by a factor of 2-10. At the same time, the relative amplitude δ = Δ N/N changed insignificantly and was within the limits 0.05-0.10 during day-time. At night, δ reached 0.25-0.30 and sometimes even 0.4-0.5. During both disturbed and undisturbed days, quasi-periodic processes with a period of 40-60 and 80-120 min prevailed. The maximum values of the absolute and relative amplitudes were achieved at a height of 200-270 km. A soliton-like disturbance formed near the main phase of the magnetic storm on November 10, 2004 was detected. Its appearance was related to the oblique coherent reflection of sounding signals. [ABSTRACT FROM AUTHOR]
Database:	Energy & Power Source

Description
Abstract:	This paper presents the results of studies of wave disturbances in the electron concentration N in the ionosphere during a prominent geospace storm, in the process of which the electron concentration decreased by a factor of 6-7, whereas the temperatures of ions and electrons at night increased up to 2000 and 3000 K, respectively. The height-time variations in the parameters of wave disturbances are also analyzed. It is shown that the geospace storm was accompanied by a substantial change in wave activity in the ionosphere. In the period of negative ionospheric storms, the amplitude Δ decreased by a factor of 2-10. At the same time, the relative amplitude δ = Δ N/N changed insignificantly and was within the limits 0.05-0.10 during day-time. At night, δ reached 0.25-0.30 and sometimes even 0.4-0.5. During both disturbed and undisturbed days, quasi-periodic processes with a period of 40-60 and 80-120 min prevailed. The maximum values of the absolute and relative amplitudes were achieved at a height of 200-270 km. A soliton-like disturbance formed near the main phase of the magnetic storm on November 10, 2004 was detected. Its appearance was related to the oblique coherent reflection of sounding signals. [ABSTRACT FROM AUTHOR]
ISSN:	00167932
DOI:	10.1134/S0016793211030042