Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa23a..01b&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SA23A-01
Physics
0355 Thermosphere: Composition And Chemistry, 2435 Ionospheric Disturbances, 2437 Ionospheric Dynamics
Scientific paper
Although much of the current flowing between the magnetosphere and the ionosphere is conducted horizontally through ionization produced by auroral precipitation, a significant amount may be conducted through ionization produced by solar UV and EUV ionization. The latter effect should be more important in the summer hemisphere where solar UV and EUV radiation can produce ionization across the polar cap. However, the importance of this solar EUV induced ionization depends on its not being changed significantly by the effects of auroral precipitation. In this talk, we use the Coupled Magnetosphere-Ionosphere-Thermosphere model to show that the conductivity associated with solar UV and EUV radiation is in fact considerably reduced during geomagnetic storms to the point where the changes produced in the system are of the same order of magnitude as the seasonal differences. Furthermore, we show that the causes of these changes occurs both as a result of a change in ion density near 120 km, and as a result of changes in ion composition from the collisionally effective O2+ to the less collisionally effective NO+. Both this change in composition and the reduction in ion densities are the result of the build up of NO during the geomagnetic storm.
Burns A. A.
Killeen Tim
Solomon Sean
Wang Wenhong
Wiltberger Michael
No associations
LandOfFree
Changes in EUV created conductivity as a result of geomagnetic storms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Changes in EUV created conductivity as a result of geomagnetic storms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Changes in EUV created conductivity as a result of geomagnetic storms will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1690809