Dynamic processes in the ionosphere during the geospace storm on 30 May and Solar eclipse on 31 May 2003
|1Grigorenko, Ye.I, 1Pazura, SA, 1Puliaiev, VA, 1Taran, VI, 2Chernogor, LF |
1Institute of Ionosphere of the National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kharkiv, Ukraine
2V.N. Karazin National University of Kharkiv, Kharkiv, Ukraine
|Kosm. nauka tehnol. 2004, 10 ;(1):012–025|
|Publication Language: Russian|
Some results of the F region and topside ionosphere response to the 29–31 May 2003 severe geomagnetic storm (maximum index Kp= 8) are presented. The observations are carried out with the Kharkov incoherent scatter radar. Considerable storm effects in the ionosphere were revealed. Among them were deep electron density N depletion, uplifting in the peak height zmF2, unusual heating of plasma, decrease of relative concentration of hydrogen ions in the main phase of the storm, infringement of processes of the ionosphere-magnetosphere interaction. The geospace storm was also accompanied by generation of wave-like ionosphere disturbances. Some features of the ionosphere response to the 73 % solar eclipse on 31 May 2003 occurred after sunrise during the recovery phase of the geomagnetic storm are considered. It is shown that, during the eclipse, short-time (2–3 h) reforming the ionosphere to night conditions takes place. The effects of magnetic disturbance, solar flare and the peculiarities of ionosphere behaviour during sunrise period, that were being imposed on the ionosphere response to the solar eclipse, are also discussed.
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