The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms
The generation and propagation of ionospheric storms are studied by analyzing EISCAT radar, and vertical-sounding and total-electron-content data obtained under different geophysical conditions. Both, case studies as well as the average storm pattern of percentage deviations of different ionospheric...
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1992
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crcansciencepubl:10.1139/p92-093 2024-03-03T08:44:02+00:00 The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms Jakowski, N. Jungstand, A. Schlegel, K. Kohl, H. Rinnert, K. 1992 http://dx.doi.org/10.1139/p92-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/p92-093 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Physics volume 70, issue 7, page 575-581 ISSN 0008-4204 1208-6045 General Physics and Astronomy journal-article 1992 crcansciencepubl https://doi.org/10.1139/p92-093 2024-02-07T10:53:31Z The generation and propagation of ionospheric storms are studied by analyzing EISCAT radar, and vertical-sounding and total-electron-content data obtained under different geophysical conditions. Both, case studies as well as the average storm pattern of percentage deviations of different ionospheric parameters from their corresponding reference values such as total electron content, F2-layer critical frequency foF2, F2-layer height hmF2, and slab thickness τ indicate the action of a perturbation electric field during the first few hours during the onset phase of geomagnetic storms. Considering the onset phase of the storm on July 28–29, 1987 evidence has been found that high-latitude electric fields may penetrate to lower latitudes before the ring current has developed. In most cases this process is accompanied by a positive phase in the upper ionosphere and F2-layer ionization. Different mechanisms are assumed to be responsible for the daytime and nighttime behaviour, respectively. The negative phase propagates equatorward with velocities in the order of 70–350 m s −1 following a strong heating of the thermosphere and ionosphere due to the auroral electrojet. Article in Journal/Newspaper EISCAT Canadian Science Publishing Canadian Journal of Physics 70 7 575 581 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Physics and Astronomy |
spellingShingle |
General Physics and Astronomy Jakowski, N. Jungstand, A. Schlegel, K. Kohl, H. Rinnert, K. The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms |
topic_facet |
General Physics and Astronomy |
description |
The generation and propagation of ionospheric storms are studied by analyzing EISCAT radar, and vertical-sounding and total-electron-content data obtained under different geophysical conditions. Both, case studies as well as the average storm pattern of percentage deviations of different ionospheric parameters from their corresponding reference values such as total electron content, F2-layer critical frequency foF2, F2-layer height hmF2, and slab thickness τ indicate the action of a perturbation electric field during the first few hours during the onset phase of geomagnetic storms. Considering the onset phase of the storm on July 28–29, 1987 evidence has been found that high-latitude electric fields may penetrate to lower latitudes before the ring current has developed. In most cases this process is accompanied by a positive phase in the upper ionosphere and F2-layer ionization. Different mechanisms are assumed to be responsible for the daytime and nighttime behaviour, respectively. The negative phase propagates equatorward with velocities in the order of 70–350 m s −1 following a strong heating of the thermosphere and ionosphere due to the auroral electrojet. |
format |
Article in Journal/Newspaper |
author |
Jakowski, N. Jungstand, A. Schlegel, K. Kohl, H. Rinnert, K. |
author_facet |
Jakowski, N. Jungstand, A. Schlegel, K. Kohl, H. Rinnert, K. |
author_sort |
Jakowski, N. |
title |
The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms |
title_short |
The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms |
title_full |
The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms |
title_fullStr |
The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms |
title_full_unstemmed |
The ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms |
title_sort |
ionospheric response to perturbation electric fields during the onset phase of geomagnetic storms |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/p92-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/p92-093 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Canadian Journal of Physics volume 70, issue 7, page 575-581 ISSN 0008-4204 1208-6045 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/p92-093 |
container_title |
Canadian Journal of Physics |
container_volume |
70 |
container_issue |
7 |
container_start_page |
575 |
op_container_end_page |
581 |
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1792499512627953664 |