Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2
Seasonal and solar cycle variations of the quasi-two- and five-day oscillation amplitudes off f0F2 are evaluated by moving periodogram analysis. The 23 year time series (1964-1986) of fOF2 hourly values of Kaliningrad (54.7°N, 20.62°E), covering the solar cycles 20 and 21, is used for the analysis....
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
1994-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4225 |
| _version_ | 1818142257434329088 |
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| author | D. Altadill L. Alberca E. M. Apostolov |
| author_facet | D. Altadill L. Alberca E. M. Apostolov |
| author_sort | D. Altadill |
| collection | DOAJ |
| description | Seasonal and solar cycle variations of the quasi-two- and five-day oscillation amplitudes off f0F2 are evaluated by moving periodogram analysis. The 23 year time series (1964-1986) of fOF2 hourly values of Kaliningrad (54.7°N, 20.62°E), covering the solar cycles 20 and 21, is used for the analysis. Long term variations of these amplitudes are modulated by the 11-year solar cycle and are simultaneously influenced by the geomagnetic activity. The annual variation of the quasi-two- and five-day oscillation amplitudes has very clear maxima near the equinoxes. The mechanism of the influence of the travelling planetary waves in the meteor wind region by vertical plasma drift to the F2-layer electron density maximum is discussed. |
| first_indexed | 2024-12-11T11:12:54Z |
| format | Article |
| id | doaj.art-60790271d2f34f30b7c150f046f71e89 |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-12-11T11:12:54Z |
| publishDate | 1994-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-60790271d2f34f30b7c150f046f71e892022-12-22T01:09:27ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X1994-06-0137210.4401/ag-4225Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2D. AltadillL. AlbercaE. M. ApostolovSeasonal and solar cycle variations of the quasi-two- and five-day oscillation amplitudes off f0F2 are evaluated by moving periodogram analysis. The 23 year time series (1964-1986) of fOF2 hourly values of Kaliningrad (54.7°N, 20.62°E), covering the solar cycles 20 and 21, is used for the analysis. Long term variations of these amplitudes are modulated by the 11-year solar cycle and are simultaneously influenced by the geomagnetic activity. The annual variation of the quasi-two- and five-day oscillation amplitudes has very clear maxima near the equinoxes. The mechanism of the influence of the travelling planetary waves in the meteor wind region by vertical plasma drift to the F2-layer electron density maximum is discussed.http://www.annalsofgeophysics.eu/index.php/annals/article/view/4225quasi-2 and 5-day oscillations upper ionosphereplanetary waves |
| spellingShingle | D. Altadill L. Alberca E. M. Apostolov Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2 Annals of Geophysics quasi-2 and 5-day oscillations upper ionosphere planetary waves |
| title | Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2 |
| title_full | Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2 |
| title_fullStr | Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2 |
| title_full_unstemmed | Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2 |
| title_short | Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2 |
| title_sort | solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fof2 |
| topic | quasi-2 and 5-day oscillations upper ionosphere planetary waves |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4225 |
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