| Session Details
|
| Section |
ST - Solar & Terrestrial Sciences
|
| Session Title |
Solar Radiation Impact on the Ionosphere |
| Main Convener |
Dr. Alexei Dmitriev (ISS NCU, Taiwan)
|
| Co-convener(s) |
|
| Session Description |
Solar radiation is a primary source of the ionosphere. A flare-associated EUV and X-ray enhancement produces immediate increase in the ionospheric ionization of varying degrees at different locations, called the Sudden Ionospheric Disturbance (SID). SID dependence on the solar zenith angle, flare location at the solar disc and flare emission spectrum is still a subject of discussion. Another problem arising from recent studies is that a large portion of the X-ray solar flares does not produce SIDs. On the other hand, the excess ionization induces an additional ionospheric current system. The question is how that system is affected by the interplanetary magnetic field. Many solar flares are followed by intensive fluxes of the solar energetic particles (SEP). A long-lasting influence of the SEP to the high- and mid- latitude ionosphere at both day and night hemispheres is another topic of interest. Retrospective studies of the solar cycle variation of undisturbed ionospheric conditions during the last four decades are important for the problems of space climatolgy and global climate changes. |
