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| Titel |
Duskside F-region dynamo currents: its relationship with prereversal enhancement of vertical plasma drift |
| VerfasserIn |
J. Park, H. Lühr, B. G. Fejer, K. W. Min |
| 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 ; 28, no. 11 ; Nr. 28, no. 11 (2010-11-12), S.2097-2101 |
| Datensatznummer |
250016913
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| Publikation (Nr.) |
 copernicus.org/angeo-28-2097-2010.pdf |
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| Zusammenfassung |
| From magnetic field observations by CHAMP we estimate F-region dynamo current
densities near the sunset terminator during solar maximum years from 2001 to
2002. The dynamo currents are compared with the pre-reversal enhancement
(PRE) of vertical plasma drift as observed by ROCSAT-1. The
seasonal-longitudinal variation of PRE can be largely related to the F-region
dynamo current density, with the correlation coefficient reaching 0.74. The
correlation can be further improved if we consider a zonal gradient of the
E-region Pedersen conductivity, which also depends on season and longitude.
It is widely accepted that the F-region dynamo drives PRE near sunset. For
the first time, our observations provide confirmation for the close
relationship between the F-region dynamo current density and PRE. |
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