Forcing of the ionosphere from above and below during the Arctic winter of 2005/2006
The present paper focuses on planetary wave type responses of the thermosphere/ionosphere system to forcing from above and below during the Arctic winter of 2005/2006. The forcing from above is described by the sunspot numbers, the solar wind speed, the Bz-component of the IMF and the geomagnetic Kp...
| Published in: | Journal of Atmospheric and Solar-Terrestrial Physics |
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| Main Authors: | , , , , |
| Format: | Other Non-Article Part of Journal/Newspaper |
| Language: | English |
| Published: |
Elsevier
2010
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| Subjects: | |
| Online Access: | https://elib.dlr.de/63238/ https://elib.dlr.de/63238/1/Mukhtarov_etal_2010.pdf |
| Summary: | The present paper focuses on planetary wave type responses of the thermosphere/ionosphere system to forcing from above and below during the Arctic winter of 2005/2006. The forcing from above is described by the sunspot numbers, the solar wind speed, the Bz-component of the IMF and the geomagnetic Kp-index, while the forcing from below, i.e. by upward propagating atmospheric waves, is represented by the SABER/TIMED temperatures. The observed global ionospheric zonally symmetric oscillations with periods of 9, 14 and 24–27 days were approved to be of solar origin. The most persistent 9-day oscillation is linked to a triad of solar coronal holes distributed roughly 120° apart in solar longitude. The 18-day westward propagating wave with zonal wavenumber 1, observed in the ionospheric currents (detected by magnetometer data), and in the F-region plasma (foF2 and TEC) could be allocated to a simultaneous 18-day westward propagating planetary wave observed in the stratosphere/mesosphere/lower thermosphere region with large (70 km) vertical wavelength. |
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