Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1777421 | Journal of Atmospheric and Solar-Terrestrial Physics | 2010 | 13 Pages |
Abstract
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 â¼9, â¼14 and â¼24-27 days were approved to be of solar origin. The most persistent â¼9-day oscillation is linked to a triad of solar coronal holes distributed roughly 120° apart in solar longitude. The â¼18-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 (â¼70 km) vertical wavelength.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
Pl. Mukhtarov, B. Andonov, C. Borries, D. Pancheva, N. Jakowski,