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| Titel |
Diurnal behaviour of the ionospheric Alfvén resonator signatures as observed at high latitude observatory Barentsburg (L=15) |
| VerfasserIn |
N. V. Semenova, A. G. Yahnin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 26, no. 8 ; Nr. 26, no. 8 (2008-08-05), S.2245-2251 |
| Datensatznummer |
250016183
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| Publikation (Nr.) |
 copernicus.org/angeo-26-2245-2008.pdf |
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| Zusammenfassung |
| The signature of the ionospheric Alfvén resonator (IAR), so called spectral
resonant structures (SRS) in the spectra of the electromagnetic noise in the
range of 0.1–10 Hz is rather frequently observed with the search coil
magnetometer at observatory Barentsburg on Svalbard (L=15). In this report
we discuss some peculiarities of diurnal occurrence of SRS at this high
latitude station. We show that the pronounced minimum of the SRS occurrence
around noon can not be explained by the diurnal variations of the solar
zenith angle (illumination of ionosphere). We conclude that the SRS
occurrence minimum is the result of the enhanced variability of ionospheric
parameters when the observing point enters (during the Earth's rotation) the
region of the ionospheric projection of the dayside cusp and its vicinity. |
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