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| Titel |
Quasi-16-day periodic meridional movement of the equatorial ionization anomaly |
| VerfasserIn |
X. H. Mo, D. H. Zhang, L. P. Goncharenko, Y. Q. Hao, Z. Xiao |
| 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 ; 32, no. 2 ; Nr. 32, no. 2 (2014-02-18), S.121-131 |
| Datensatznummer |
250121026
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| Publikation (Nr.) |
 copernicus.org/angeo-32-121-2014.pdf |
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| Zusammenfassung |
| Based on the daytime location of the equatorial ionization anomaly (EIA)
crest derived from GPS observations at low latitude over China during the
2005–2006 stratospheric sudden warming (SSW), a quasi-16-day periodic
meridional movement of EIA crest with the maximum amplitude of about 2
degrees relative to the average location of EIA crest has been revealed. In
addition, periodic variations that are in phase with the meridional EIA
movement are also revealed in the equatorial electrojet (EEJ) and F2 layer
peak height (hmF2) over Chinese ionosonde stations Haikou and Chongqing. The
quasi-16-day periodic component in Dst index is weak, and the 16-day
periodic component does not exist in F10.7 index. Such large-scale periodic
meridional movement of EIA crest is likely related to the globally enhanced
stratospheric planetary waves coupled with anomalous stratospheric zonal
wind connected with SSW. In addition, such large-scale periodic movement of
EIA should be global, and can affect the ionospheric morphology around the
low-latitude belt near the EIA region. Further case analysis, simulation and
theoretical studies must proceed in order to understand the periodic
movements of EIA connected with the different periodic atmospheric
variations. |
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