Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3510109l&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 10, CiteID L10109
Astronomy and Astrophysics
Astrophysics
47
Atmospheric Composition And Structure: Thermosphere: Energy Deposition (3369), Atmospheric Processes: Thermospheric Dynamics (0358), Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections (2101), Radio Science: Space And Satellite Communication
Scientific paper
We report discovery of a solar-terrestrial connection between rotating solar coronal holes and density variations in Earth's thermosphere. Specifically, during 2005, a 9-day recurrence of fast streams in the solar wind exists due to solar coronal holes distributed roughly 120 degrees apart in longitude; this periodicity is transmitted to the geospace environment where it modulates geomagnetic activity and thermospheric densities derived from accelerometer measurements on the CHAMP satellite. Our discovery demonstrates a solar-terrestrial connection that has not been appreciated before, and by its nature is characterized by an element of predictability. Its potential predictability has practical relevance for collision avoidance and other applications affected by density variability in the terrestrial space environment.
Forbes Jeffrey M.
Lei Jiuhou
Nerem Steven R.
Sutton Eric K.
Thayer Jeffrey P.
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