Gravity wave generation and propagation during geomagnetic storms over Kiruna (67.8°N, 20.4°E)

• Published in: Annales Geophysicae
• Main Authors: Fagundes, P. R., Aruliah, A. L., Rees, D., Bittencourt, J. A.
• Format: Text
• Language: English
• Published: 2018
• Subjects: Kiruna
• Online Access: https://doi.org/10.1007/s00585-995-0358-7; https://angeo.copernicus.org/articles/13/358/1995/

Atmospheric gravity waves, detected over Kiruna (67.8°N, 20.4°E) during geomagnetic storms, are presented and analysed. The data include direct measurements of the OI 630.0 nm emission line intensity, the x -component of the local geomagnetic field and thermospheric (meridional and zonal) wind velocities derived from the OI 630.0 nm Doppler shift observed with an imaging Fabry-Perot interferometer (IFPI). A low pass band filter technique was used to determine short-period variations in the thermospheric meridional wind velocities observed during geomagnetic storms. These short-period variations in the meridional wind velocities, which are identified as due to gravity waves, are compared to the corresponding variations observed in the OI 630.0 nm emission line intensity, x -component of the local geomagnetic field and the location of the auroral electrojet. A cross-correlation analysis was used to calculate the propagation velocities of the observed gravity waves.