Impact of Flare Radiation on the Ionosphere

Details Impact of Flare Radiation on the Ionosphere Impact of Flare Radiation on the Ionosphere

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa33a..03s&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SA33A-03

Physics

2427 Ionosphere/Atmosphere Interactions (0335), 2435 Ionospheric Disturbances, 2437 Ionospheric Dynamics, 2736 Magnetosphere/Ionosphere Interactions (2431), 3369 Thermospheric Dynamics (0358)

Scientific paper

We study the impact of the solar flare radiation on the low- to mid-latitude ionosphere for a number of flares: 28 Oct 2003, 29 Oct 2003, 4 Nov 2004, and 7 Sept 2005. We use the solar EUV spectrum from the Flare Irradiance Spectral Model (FISM)1; the spectrum considers 10Å bins from 10 -- 1050 Å and a one minute cadence. We use this spectrum in the NRL three-dimensional ionosphere model SAMI3 to obtain the global impact of the flare on the mid- to low-latitude ionosphere. We find that the TEC can increase by ~ 10% which can be as high as ~ 25 TECU. Finally, we compare our results to GPS data and discuss improvements to the model. 1 Chamberlin, P.C., T.N. Woods, and F.G. Eparvier, ILWS Workshop Proc., GOA, 2006. Research supported by ONR.

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