Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations

Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations

The response of the dayside ionosphere to changes in polarity of the interplanetary magnetic field was observed by two independent techniques. The signatures were seen in the 630.0 nm red-line emission, measured by a meridian scanning photometer at Ny-Ålesund on Svalbard, and also in the line-of...

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Main Authors: S. E. Pryse, A. M. Smith, L. Kersley
Format: Article
Language:English
Published: Copernicus Publications 2000-07-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/18/782/2000/angeo-18-782-2000.pdf
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spelling doaj-d14349d26bb0401597566cf4e3bb37c22020-11-24T22:32:10ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762000-07-011878278810.1007/s00585-000-0782-7Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observationsS. E. Pryse0S. E. Pryse1S. E. Pryse2A. M. Smith3A. M. Smith4A. M. Smith5L. Kersley6L. Kersley7L. Kersley8e-mail: lek@aber.ac.ukDepartment of Physics, University of Wales, Aberystwyth, SY23 3BZ, UK<i>Correspondence to:</i> L. Kersleye-mail: lek@aber.ac.ukDepartment of Physics, University of Wales, Aberystwyth, SY23 3BZ, UK<i>Correspondence to:</i> L. Kersleye-mail: lek@aber.ac.ukDepartment of Physics, University of Wales, Aberystwyth, SY23 3BZ, UK<i>Correspondence to:</i> L. KersleyThe response of the dayside ionosphere to changes in polarity of the interplanetary magnetic field was observed by two independent techniques. The signatures were seen in the 630.0 nm red-line emission, measured by a meridian scanning photometer at Ny-Ålesund on Svalbard, and also in the line-of-sight plasma velocities monitored by the Finland CUTLASS SuperDARN radar. A time difference of some 6 to 8 min occurred between the responses of the two techniques, with the flows being first to respond. In the present case study, the longer delay in the optics suggests that ion precipitation controls the auroral emission.<br><br><b>Key words: </b>Ionosphere (ionosphere-magnetosphere interactions) · Magnetospheric physics (magnetosphere-ionosphere interactions; polar cap phenomena)https://www.ann-geophys.net/18/782/2000/angeo-18-782-2000.pdf
collection DOAJ
language English
format Article
sources DOAJ
author S. E. Pryse
S. E. Pryse
S. E. Pryse
A. M. Smith
A. M. Smith
A. M. Smith
L. Kersley
L. Kersley
L. Kersley
spellingShingle S. E. Pryse
S. E. Pryse
S. E. Pryse
A. M. Smith
A. M. Smith
A. M. Smith
L. Kersley
L. Kersley
L. Kersley
Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations
Annales Geophysicae
author_facet S. E. Pryse
S. E. Pryse
S. E. Pryse
A. M. Smith
A. M. Smith
A. M. Smith
L. Kersley
L. Kersley
L. Kersley
author_sort S. E. Pryse
title Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations
title_short Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations
title_full Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations
title_fullStr Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations
title_full_unstemmed Dayside ionospheric response to changes in IMF polarity: optical and plasma-flow observations
title_sort dayside ionospheric response to changes in imf polarity: optical and plasma-flow observations
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 2000-07-01
description The response of the dayside ionosphere to changes in polarity of the interplanetary magnetic field was observed by two independent techniques. The signatures were seen in the 630.0 nm red-line emission, measured by a meridian scanning photometer at Ny-Ålesund on Svalbard, and also in the line-of-sight plasma velocities monitored by the Finland CUTLASS SuperDARN radar. A time difference of some 6 to 8 min occurred between the responses of the two techniques, with the flows being first to respond. In the present case study, the longer delay in the optics suggests that ion precipitation controls the auroral emission.<br><br><b>Key words: </b>Ionosphere (ionosphere-magnetosphere interactions) · Magnetospheric physics (magnetosphere-ionosphere interactions; polar cap phenomena)
url https://www.ann-geophys.net/18/782/2000/angeo-18-782-2000.pdf
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