Relation of long-period variations in the critical frequencies of the F 2 layer to geomagnetic activity
The relation of the long-period variations in the midnight and noon values of the critical frequency of the ionospheric F 2 layer at three midlatitude stations (Irkutsk, Moscow, and Boulder) to the daily mean index of geomagnetic activity in years of different solar activity has been studied. It has...
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| Veröffentlicht in: | Geomagnetism and Aeronomy 2009-02, Vol.49 (1), p.58-64 |
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| container_title | Geomagnetism and Aeronomy |
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| creator | Vergasova, G. V. Kazimirovsky, E. S. Polekh, N. M. |
| description | The relation of the long-period variations in the midnight and noon values of the critical frequency of the ionospheric F 2 layer at three midlatitude stations (Irkutsk, Moscow, and Boulder) to the daily mean index of geomagnetic activity in years of different solar activity has been studied. It has been found that the correlation coefficients between the above parameters depend on time of day, season, and solar activity level. The correlation coefficients are higher at night than in the daytime, especially at low solar activity. The highest absolute values of the correlation coefficient most often appear during equinoxes: April-May and September-October. It has been shown that the variability of the critical frequencies of the midlatitude ionospheric F 2 layer depends not only on geomagnetic activity but also (to a considerable degree) on the effect of the lower atmosphere. [PUBLICATION ABSTRACT] |
| doi_str_mv | 10.1134/S0016793209010083 |
| format | Article |
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It has been shown that the variability of the critical frequencies of the midlatitude ionospheric F 2 layer depends not only on geomagnetic activity but also (to a considerable degree) on the effect of the lower atmosphere. 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It has been shown that the variability of the critical frequencies of the midlatitude ionospheric F 2 layer depends not only on geomagnetic activity but also (to a considerable degree) on the effect of the lower atmosphere. 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| subjects | Aeronomy Correlation coefficient Geophysics Ionosphere Latitude Magnetic fields Solar activity |
| title | Relation of long-period variations in the critical frequencies of the F 2 layer to geomagnetic activity |
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