 |
| Titel |
Storm induced large scale TIDs observed in GPS derived TEC |
| VerfasserIn |
C. Borries, N. Jakowski, V. Wilken |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 4 ; Nr. 27, no. 4 (2009-04-03), S.1605-1612 |
| Datensatznummer |
250016484
|
| Publikation (Nr.) |
 copernicus.org/angeo-27-1605-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
This work is a first statistical analysis of large scale traveling
ionospheric disturbances (LSTID) in Europe using total electron content (TEC)
data derived from GNSS measurements. The GNSS receiver network in Europe is
dense enough to map the ionospheric perturbation TEC with high horizontal
resolution. The derived perturbation TEC maps are analysed studying the
effect of space weather events on the ionosphere over Europe.
Equatorward propagating storm induced wave packets have been identified
during several geomagnetic storms. Characteristic parameters such as
velocity, wavelength and direction were estimated from the perturbation TEC
maps. Showing a mean wavelength of 2000 km, a mean period of 59 min and a
phase speed of 684 ms−1 in average, the perturbations are allocated to
LSTID. The comparison to LSTID observed over Japan shows an equal wavelength
but a considerably faster phase speed. This might be attributed to the
differences in the distance to the auroral region or inclination/declination
of the geomagnetic field lines.
The observed correlation between the LSTID amplitudes and the Auroral
Electrojet (AE) indicates that most of the wave like perturbations are exited
by Joule heating. Particle precipitation effects could not be separated. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|