Magnetospheric—ionospheric effect on the ground-level atmospheric electric field at Helsinki
✍ Scribed by N. Ptitsyna; T.J. Tuomi; A. Levitin; I. Gromova
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 610 KB
- Volume
- 59
- Category
- Article
- ISSN
- 1364-6826
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✦ Synopsis
The magnetospheric-ionospheric influence on the ground-level atmospheric electric field measured at Helsinki is investigated on the basis of comparison with a numerical model of the high-latitude ionospheric electric field of solar wind of magnetospheric origin. It is found that the contribution of the magnetospheric&onospheric generator to the ground-level atmospheric electric field varies with the local time, the season and the conditions of the magnetosphere, and the large-scale electrodynamic features of the ionosphere.
The latter are characterized as disturbances in -the east and north components of the interplanetary magnetic field. The atmospheric electric field values can differ in winter by lo&150 Vrn-' between extremely quiet and extremely disturbed magnetospheric conditions.