High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes
Positive ionospheric anomalies induced in the polar cap region by co-rotating interaction region (CIR)- and coronal mass ejection (CME)-driven geomagnetic storms are analysed using four-dimensional tomographic reconstructions of the ionospheric plasma density based on measurements of the total elect...
Published in: | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | http://dx.doi.org/10.1098/rspa.2010.0080 https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.2010.0080 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspa.2010.0080 |
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crroyalsociety:10.1098/rspa.2010.0080 2024-06-02T08:02:23+00:00 High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes Pokhotelov, D. Jayachandran, P. T. Mitchell, C. N. Denton, M. H. 2010 http://dx.doi.org/10.1098/rspa.2010.0080 https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.2010.0080 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspa.2010.0080 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 466, issue 2123, page 3391-3408 ISSN 1364-5021 1471-2946 journal-article 2010 crroyalsociety https://doi.org/10.1098/rspa.2010.0080 2024-05-07T14:16:15Z Positive ionospheric anomalies induced in the polar cap region by co-rotating interaction region (CIR)- and coronal mass ejection (CME)-driven geomagnetic storms are analysed using four-dimensional tomographic reconstructions of the ionospheric plasma density based on measurements of the total electron content along ray paths of GPS signals. The results of GPS tomography are compared with ground-based observations of F region plasma density by digital ionosondes located in the Canadian Arctic. It is demonstrated that CIR- and CME-driven storms can produce large-scale polar cap anomalies of similar morphology in the form of the tongue of ionization (TOI) that appears on the poleward edge of the mid-latitude dayside storm-enhanced densities in positive ionospheric storms. The CIR-driven event of 14–16 October 2002 was able to produce ionospheric anomalies (TOI) comparable to those produced by the CME-driven storms of greater Dst magnitude. From the comparison of tomographic reconstructions and ionosonde data with solar wind measurements, it appears that the formation of large-scale polar cap anomalies is controlled by the orientation of the interplanetary magnetic field (IMF) with the TOI forming during the periods of extended southward IMF under conditions of high solar wind velocity. Article in Journal/Newspaper Arctic The Royal Society Arctic Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 466 2123 3391 3408 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Positive ionospheric anomalies induced in the polar cap region by co-rotating interaction region (CIR)- and coronal mass ejection (CME)-driven geomagnetic storms are analysed using four-dimensional tomographic reconstructions of the ionospheric plasma density based on measurements of the total electron content along ray paths of GPS signals. The results of GPS tomography are compared with ground-based observations of F region plasma density by digital ionosondes located in the Canadian Arctic. It is demonstrated that CIR- and CME-driven storms can produce large-scale polar cap anomalies of similar morphology in the form of the tongue of ionization (TOI) that appears on the poleward edge of the mid-latitude dayside storm-enhanced densities in positive ionospheric storms. The CIR-driven event of 14–16 October 2002 was able to produce ionospheric anomalies (TOI) comparable to those produced by the CME-driven storms of greater Dst magnitude. From the comparison of tomographic reconstructions and ionosonde data with solar wind measurements, it appears that the formation of large-scale polar cap anomalies is controlled by the orientation of the interplanetary magnetic field (IMF) with the TOI forming during the periods of extended southward IMF under conditions of high solar wind velocity. |
format |
Article in Journal/Newspaper |
author |
Pokhotelov, D. Jayachandran, P. T. Mitchell, C. N. Denton, M. H. |
spellingShingle |
Pokhotelov, D. Jayachandran, P. T. Mitchell, C. N. Denton, M. H. High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes |
author_facet |
Pokhotelov, D. Jayachandran, P. T. Mitchell, C. N. Denton, M. H. |
author_sort |
Pokhotelov, D. |
title |
High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes |
title_short |
High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes |
title_full |
High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes |
title_fullStr |
High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes |
title_full_unstemmed |
High-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by GPS tomography and ionosondes |
title_sort |
high-latitude ionospheric response to co-rotating interaction region- and coronal mass ejection-driven geomagnetic storms revealed by gps tomography and ionosondes |
publisher |
The Royal Society |
publishDate |
2010 |
url |
http://dx.doi.org/10.1098/rspa.2010.0080 https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.2010.0080 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspa.2010.0080 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 466, issue 2123, page 3391-3408 ISSN 1364-5021 1471-2946 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspa.2010.0080 |
container_title |
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
466 |
container_issue |
2123 |
container_start_page |
3391 |
op_container_end_page |
3408 |
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1800746886021251072 |