Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3519105l&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 19, CiteID L19105
Astronomy and Astrophysics
Astrophysics
26
Ionosphere: Ionosphere/Magnetosphere Interactions (2736), Ionosphere: Ionospheric Disturbances, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Atmospheric Composition And Structure: Thermosphere: Composition And Chemistry, Solar Physics, Astrophysics, And Astronomy: Coronal Holes
Scientific paper
We present 9- and 7-day periodic oscillations in the global mean Total Electron Content (TEC) from 1 January 2005 to 31 December 2006. Spectral analysis indicates that the pronounced periodicities of 9 and 7 days observed in TEC are associated with variations in solar wind high-speed streams and geomagnetic activity. Neutral temperature and winds near 250 km, measured by a Fabry-Perot Interferometer at Resolute Bay, also exhibit 9- and 7-day periodicities. These pronounced periodicities support simultaneous observations of 9- and 7-day periodicities in thermosphere neutral density (Lei et al., 2008a; Thayer et al., 2008). It is anticipated that the ionospheric response at 9 and 7 days represents some combination of effects due to chemical loss, neutral winds, and disturbance dynamo-driven electric fields.
Forbes Jeffrey M.
Lei Jiuhou
She Chengli
Thayer Jeffrey P.
Wan Weixing
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