HR: 0800h
AN: A31A-0037    [Abstracts]
TI: Impact of Strong Geomagnetic Storms on the Atmosphere-Ionosphere System: Case Studies
AU: * Bochnicek, J
EM: jboch@ig.cas.cz
AF: Geophysical Institute ASCR, Bocni II/1401, Prague 4, 14131 Czech Republic
AU: Hejda, P
EM: ph@ig.cas.cz
AF: Geophysical Institute ASCR, Bocni II/1401, Prague 4, 14131 Czech Republic
AU: Buresova, D
EM: buresd@ufa.cas.cz
AF: Institute of Atmospheric Sciences ASCR, Bocni II/1401, Prague 4, 14131 Czech Republic
AU: Krizan, P
EM: krizan@ufa.cas.cz
AF: Institute of Atmospheric Sciences ASCR, Bocni II/1401, Prague 4, 14131 Czech Republic
AU: Lastovicka, J
EM: jla@ufa.cas.cz
AF: Institute of Atmospheric Sciences ASCR, Bocni II/1401, Prague 4, 14131 Czech Republic
AB: Impact of strong geomagnetic storms on the atmosphere-ionosphere system is in some regions relatively understood, as in the F2 region ionosphere and the lower ionosphere, while in other regions/parameters is known little or controversial. We focus on such parts of that complex process, which have not yet been clarified, with emphasis to European area. The purpose of the paper is to help to fill in gapes in the vertical profile of geomagnetic storm effect. The electron density at F1 region heights, temperature, pressure and wind velocity fields at pressure levels from surface to 100 hPa, and total ozone are studied for six strong geomagnetic storms (Ap>60, Dst<-120 nT) from the 1990s and 2000s. The electron density at F1 region heights was found to decrease during the storms. Effects in total ozone were confirmed to be dependent on the QBO and solar activity. Strengthening of winds in the troposphere and lowermost stratosphere is expected.
DE: 2162 Solar cycle variations (7536)
DE: 2419 Ion chemistry and composition (0335)
DE: 0342 Middle atmosphere--energy deposition
DE: 0350 Pressure, density, and temperature
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting