Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variations
Ground-based ionosonde and magnetic-field observations on the equatorial station Huancayo, ESRO4 neutral-composition measurements, and theoretical model calculations were used to analyze disturbed <strong>E</strong>×<strong>B</strong> vertical...
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Series: | Annales Geophysicae |
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doaj-ae493353bf3942e89c7705897a0bccc72020-11-24T21:25:52ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-0576147733743Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variationsA. V. MikhailovM. FörsterT. Y. LeschinskayaGround-based ionosonde and magnetic-field observations on the equatorial station Huancayo, ESRO4 neutral-composition measurements, and theoretical model calculations were used to analyze disturbed <strong>E</strong>×<strong>B</strong> vertical plasma drift during the phase of solar minimum in 1973. Vertical drifts calculated for disturbed days do not show the systematic decrease often mentioned in publications, and demonstrate strong dependence on IMF-<i>B<sub>z</sub></i> changes. It is confirmed with the help of our drift calculations that <i>B<sub>z</sub></i> turnings to a northward direction result in a decrease (up to reversal) of normal Sq (eastward during daytime and westward at nighttime) in the zonal component of electric field. Southward <i>B<sub>z</sub></i> excursions enhance normal <i>E<sub>y</sub></i> both in daytime and nighttime hours. Model predictions of <i>E<sub>y</sub></i>'s reaction to IMF-<i>B<sub>z</sub></i> changes are discussed. http://www.ann-geophys.net/14/733/1996/angeo-14-733-1996.html |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. V. Mikhailov M. Förster T. Y. Leschinskaya |
spellingShingle |
A. V. Mikhailov M. Förster T. Y. Leschinskaya Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variations Annales Geophysicae |
author_facet |
A. V. Mikhailov M. Förster T. Y. Leschinskaya |
author_sort |
A. V. Mikhailov |
title |
Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variations |
title_short |
Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variations |
title_full |
Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variations |
title_fullStr |
Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variations |
title_full_unstemmed |
Disturbed vertical E×B plasma drifts in the equatorial F2 region at solar minimum deduced from observed NmF2 and hmF2 variations |
title_sort |
disturbed vertical e×b plasma drifts in the equatorial f2 region at solar minimum deduced from observed nmf2 and hmf2 variations |
publisher |
Copernicus Publications |
series |
Annales Geophysicae |
issn |
0992-7689 1432-0576 |
description |
Ground-based ionosonde and magnetic-field observations on the equatorial station Huancayo, ESRO4 neutral-composition measurements, and theoretical model calculations were used to analyze disturbed <strong>E</strong>×<strong>B</strong> vertical plasma drift during the phase of solar minimum in 1973. Vertical drifts calculated for disturbed days do not show the systematic decrease often mentioned in publications, and demonstrate strong dependence on IMF-<i>B<sub>z</sub></i> changes. It is confirmed with the help of our drift calculations that <i>B<sub>z</sub></i> turnings to a northward direction result in a decrease (up to reversal) of normal Sq (eastward during daytime and westward at nighttime) in the zonal component of electric field. Southward <i>B<sub>z</sub></i> excursions enhance normal <i>E<sub>y</sub></i> both in daytime and nighttime hours. Model predictions of <i>E<sub>y</sub></i>'s reaction to IMF-<i>B<sub>z</sub></i> changes are discussed. |
url |
http://www.ann-geophys.net/14/733/1996/angeo-14-733-1996.html |
work_keys_str_mv |
AT avmikhailov disturbedverticalebplasmadriftsintheequatorialf2regionatsolarminimumdeducedfromobservednmf2andhmf2variations AT mforster disturbedverticalebplasmadriftsintheequatorialf2regionatsolarminimumdeducedfromobservednmf2andhmf2variations AT tyleschinskaya disturbedverticalebplasmadriftsintheequatorialf2regionatsolarminimumdeducedfromobservednmf2andhmf2variations |
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