Six-day westward propagating wave in the maximum electron density of the ionosphere
Analyses of time-spatial variations of critical plasma frequency <i>f</i>oF2 during the summer of 1998 reveal the existence of an oscillation activity with attributes of a 6-day westward propagating wave. This event manifests itself as a global scale wave in the <i>f</i&...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2003-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/21/1577/2003/angeo-21-1577-2003.pdf |
| Summary: | Analyses of time-spatial
variations of critical plasma frequency <i>f</i>oF2 during the summer of 1998
reveal the existence of an oscillation activity with attributes of a 6-day
westward propagating wave. This event manifests itself as a global scale wave
in the <i>f</i>oF2 of the Northern Hemisphere, having a zonal wave number 2.
This event coincides with a 6-day oscillation activity in the meridional
neutral winds of the mesosphere/lower thermosphere (MLT). The oscillation in
neutral winds seems to be linked to the 6–7-day global scale unstable mode
westward propagating wave number 1 in the MLT. The forcing mechanisms of the
6-day wave event in the ionosphere from the wave activity in the MLT are
discussed.<br><br><b>Key words. </b>Ionosphere
(Ionosphere-Atmosphere interactions; Mid-latitude Ionosphere) – Meterology
and atmospheric dynamics (waves and tides) |
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| ISSN: | 0992-7689 1432-0576 |