 |
| Titel |
F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations |
| VerfasserIn |
A. D. Danilov, A. V. Mikhailov |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 19, no. 3 ; Nr. 19, no. 3, S.341-349 |
| Datensatznummer |
250014223
|
| Publikation (Nr.) |
 copernicus.org/angeo-19-341-2001.pdf |
|
|
|
|
|
| Zusammenfassung |
The ionospheric sounding
data at two southern hemisphere stations, the Argentine Islands and Port
Stanley, are analyzed using a method previously developed by the authors.
Negative trends of the critical frequency foF2 are found for both
stations. The magnitudes of the trends are close to those at the corresponding
(close geomagnetic latitude) stations of the northern hemisphere, as considered
previously by the authors. The values of the F2 layer height hmF2
absolute trends ΔhmF2 are considered. The effect of
ΔhmF2 dependence on hmF2 found by Jarvis et al. (1998)
is reproduced. A concept is considered that long-term changes of the geomagnetic
activity may be an important (if not the only) cause of all the trends of foF2
and hmF2 derived by several groups of authors. The dependence of both
parameters on the geomagnetic index Ap corresponds to a smooth scheme of
the ionospheric storm physics and morphology; thus, a principal cause of the foF2
and hmF2 geomagnetic trends is most probably a trend found in several
publications in the number and intensity of ionospheric storms.
Key words. Ionosphere
(ionosphere-atmosphere interaction; ionospheric disturbances) |
| |
|
| Teil von |
|
|
|
|
|
|
|
|