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| Titel |
Positive ionospheric storm effects at Latin America longitude during the superstorm of 20–22 November 2003: revisit |
| VerfasserIn |
B. Zhao, W. Wan, J. Lei, Y. Wei, Y. Sahai, B. Reinisch |
| 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 ; 30, no. 5 ; Nr. 30, no. 5 (2012-05-10), S.831-840 |
| Datensatznummer |
250017224
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| Publikation (Nr.) |
 copernicus.org/angeo-30-831-2012.pdf |
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| Zusammenfassung |
| Positive ionospheric storm effects that occurred during
the superstorm on 20 November 2003 are investigated using a combination of
ground-based Global Positioning System (GPS) total electron content (TEC),
and the meridian chain of ionosondes distributed along the Latin America
longitude of ~280° E. Both the ground-based GPS TEC and ionosonde
electron density profile data reveal significant enhancements at mid-low
latitudes over the 280° E region during the main phase of the November
2003 superstorm. The maximum enhancement of the topside ionospheric electron
content is 3.2–7.7 times of the bottomside ionosphere at the locations of
the ionosondes distributed around the mid- and low latitudes. Moreover, the
height of maximum electron density exceeds 400 km and increases by 100 km
compared with the quiet day over the South American area from middle to low
latitudes, which might have resulted from a continuous eastward penetration
electric field and storm-generated equatorward winds. Our results do not
support the conclusions of Yizengaw et al. (2006), who suggested that the observed positive
storm over the South American sector was mainly the consequence of the
changes of the bottomside ionosphere. The so-called "unusual" responses of
the topside ionosphere for the November 2003 storm in Yizengaw et al. (2006) are likely
associated with the erroneous usage of magnetometer and incomplete data. |
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