Enhancement of thermospheric mass density by soft electron precipitation
Article first published online: 26 OCT 2012
©2012. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 39, Issue 20, 28 October 2012
How to Cite
2012), Enhancement of thermospheric mass density by soft electron precipitation, Geophys. Res. Lett., 39, L20102, doi:10.1029/2012GL053519., , , , , , and (
- Issue published online: 26 OCT 2012
- Article first published online: 26 OCT 2012
- Manuscript Accepted: 25 SEP 2012
- Manuscript Revised: 24 SEP 2012
- Manuscript Received: 24 AUG 2012
- global simulations;
- soft electron precipitation;
- thermospheric mass density enhancement
 Enhancements in F-region electron density and temperature and bottomside Pedersen conductivity caused by soft electron precipitation are shown to enhance the Joule heating per unit mass and the mass density of the thermosphere atF-region altitudes. The results are derived from the coupled magnetosphere-ionosphere-thermosphere model (CMIT) including two types of causally specified soft electron precipitation—direct-entry cusp precipitation and Alfvén-wave induced, broadband electron precipitation—the effects of which are self-consistently included for the first time in a coupled global simulation model. The simulation results provide a causal explanation of CHAMP satellite measurements of statistical enhancements in thermospheric mass density at 400 km altitudes in the cusp and premidnight auroral region.