Diurnal Variation of Gravity Wave Activity at Midlatitudes in the Ionospheric F Region |
| |
Authors: | Boška J. Šauli P. Altadill D. German Solé J. Alberca L.F. |
| |
Affiliation: | (1) Institute of Atmospheric Physics, Acad. Sci. Czech Rep., Boní II/1401, 141 31 Prague 4, Czech Republic;(2) Observatori de l'Ebre, URL – CSIC, 43520 Roquetes, Spain |
| |
Abstract: | We investigate the short-term fluctuations in the period range from 15 to 180 minutes in the electron density variations of the F region ionosphere. Electron density profiles obtained at the ionospheric stations of Pruhonice (49.9° N, 14.5° E) and Ebro (40.8° N, 0.5° E) at five minute time sampling have been used for this analysis. The diurnal changes of the activity of the acoustic gravity wave fluctuations (AGW) show a clear enhancement during and several hours after sunrise. The periods of such AGW's are about 60 to 75 minutes and these waves propagates vertically through the ionosphere from a source located at an altitude of 180-220 km. The most likely source for these events seems to be passage of the Solar terminator. |
| |
Keywords: | AGW ionospheric sounding wave propagation |
本文献已被 SpringerLink 等数据库收录! |
|