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Possible influence of ultra-fast Kelvin wave on the equatorial ionosphere evening uplifting

2009; Springer Nature; Volume: 61; Issue: 4 Linguagem: Inglês

10.1186/bf03353162

1880-5981

H. Takahashi, M. A. Abdu, C. M. Wrasse, J. Fechine, I. S. Batista, D. Pancheva, Lourivaldo Mota Lima, P. P. Batista, B. R. Clemesha, K. Shiokawa, D. Gobbi, M. G. Mlynczak, James M. Russell,

GNSS positioning and interference

Abstract Equatorial 3.5-day ultra-fast Kelvin wave was observed in the MLT zonal wind measured by meteor radar at Cariri (7.4°S, 36.5°W, geomag. 8°S) and in the stratosphere-mesosphere temperature structures from the TIMED/SABER data. The ionospheric F -layer bottom-side virtual height hT’F and the critical frequency f o F 2 observed at Fortaleza (3.9°S, 38.4°W, geomag. 5°S) also showed similar oscillation structures, indicating an influence of the Kelvin wave in the F region height and modulation of E × B uplifting during the evening period. Consequently the ionospheric spread F onset time was also modulated in the same period, around 4 days.