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| Titel |
Effects of geomagnetic activity on the mesospheric electric fields |
| VerfasserIn |
A. M. Zadorozhny, A. A. Tyutin |
| 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 ; 16, no. 12 ; Nr. 16, no. 12, S.1544-1551 |
| Datensatznummer |
250013591
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| Publikation (Nr.) |
 copernicus.org/angeo-16-1544-1998.pdf |
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| Zusammenfassung |
The results of three series of rocket
measurements of mesospheric electric fields carried out under different
geomagnetic conditions at polar and high middle latitudes are analysed. The
measurements show a clear dependence of the vertical electric fields on
geomagnetic activity at polar and high middle latitudes. The vertical electric
fields in the lower mesosphere increase with the increase of geomagnetic indexes
Kp and ∑Kp. The simultaneous increase
of the vertical electric field strength and ion conductivity was observed in the
mesosphere during geomagnetic disturbances. This striking phenomenon was
displayed most clearly during the solar proton events of October, 1989
accompanied by very strong geomagnetic storm (Kp=8+). A
possible mechanism of generation of the vertical electric fields in the
mesosphere caused by gravitational sedimentation of charged aerosol particles is
discussed. Simultaneous existence in the mesosphere of both the negative and
positive multiply charged aerosol particles of different sizes is assumed for
explanation of the observed V/m vertical electric fields and their behaviour
under geomagnetically disturbed conditions.
Keywords. Atmospheric composition and structure
(aerosols and particles) · Ionosphere (electric fields and currents) ·
Meteorology and atmospheric dynamics (atmospheric electricity) |
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