Severe magnetic, ionospheric and atmospheric storms in september 1998: the comparison of measurement and modeling results

1Grigorenko, Ye.I, 2Dzyubanov, DA, 1Lysenko, VN, 1Taran, VI, 3Chernogor, LF
1Institute of Ionosphere of the National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kharkiv, Ukraine
2National Technical University «Kharkiv Polytechnic Institute», Kharkiv, Ukraine
3V.N. Karazin National University of Kharkiv, Kharkiv, Ukraine
Kosm. nauka tehnol. 2003, 9 ;(4):049-066
Publication Language: Russian
The Kharkiv IS radar observations during the 25 September 1998 severe magnetic storm showed significant changes in the behavior of the midlatitude ionosphere related to the inner plasmasphere (geomagnetic latitude of the radar is equal to 45.7°, L = 1.9). Some features of a pronounced negative ionosphere storm are considered. Among them are a considerable electron density depletion, uplifting in the peak height zmF2, increase in plasma and neutral temperatures. They can be explained in terms of thermosphere disturbances, the Joule heating, the penetration of magnetospheric convection electric fields into midlatitudes, and other effects. A comparison of the measured and modeled ionosphere and atmosphere responses to the magnetic storm is presented.
Keywords: atmospheric storms, ionospheric storms, magnetic storms, modeling
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