A New Solar-Terrestrial Connection: Multi-Day Oscillations in Thermosphere and Ionosphere Properties

Details A New Solar-Terrestrial Connection: Multi-Day Oscillations in Thermosphere and Ionosphere Properties A New Solar-Terrestrial Connection: Multi-Day Oscillations in Thermosphere and Ionosphere Properties

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa31b..02t&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA31B-02

Other

0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition (3369), 2441 Ionospheric Storms (7949), 7969 Satellite Drag (1241)

Scientific paper

We report on a new solar-terrestrial connection where multi-day periodicities observed in solar wind high speed streams are manifested in the thermosphere and ionosphere response. We illustrate particularly strong periodicities at 9 and 7 days in 2005 and 2006 in solar wind speed, geomagnetic activity, thermosphere mass density, neutral temperature, columnar O/N2 ratio, carbon dioxide and nitric oxide IR emission, and global ionosphere total electron content, TEC. These periodic oscillations are not observed in the solar EUV flux. This allows for the geomagnetic effects to be separated from solar flux effects in describing the response of the thermosphere and ionosphere to solar wind high speed streams. We will present the thermosphere and ionosphere observations and discuss the implications of the varying response of these parameters to solar wind high speed streams. We expect these multiday periodicities to be observed in other thermosphere/ionosphere/magnetosphere data sets during the declining phase of this solar cycle, enabling a much more extensive analysis of the entire geospace response to solar wind high speed stream disturbances.

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