Six-day westward propagating wave in the maximum electron density of the ionosphere

Reference:

Altadill, D., Apostolov, E. M., Jacobi, C. and Mitchell, N. J., 2003. Six-day westward propagating wave in the maximum electron density of the ionosphere. Annales Geophysicae, 21 (7), pp. 1577-1588.

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Abstract

Analyses of time-spatial variations of critical plasma frequency foF2 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 foF2 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 I in the MLT. The forcing mechanisms of the 6-day wave event in the ionosphere from the wave activity in the MLT are discussed.

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