Computer Science – Sound
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ge%26ae..51..305b&link_type=abstract
Geomagnetism and Aeronomy, Volume 51, Issue 3, pp.305-320
Computer Science
Sound
Scientific paper
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 N decreased by a factor of 2-10. At the same time, the relative amplitude δ N = Δ N/N changed insignificantly and was within the limits 0.05-0.10 during day-time. At night, δ N 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.
Burmaka V. P.
Chernogor L. F.
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