Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors
The ionospheric response at middle and high latitudes in the Antarctica American and Australian sectors to the 26–27 September 2011 moderately intense geomagnetic storm was investigated using instruments including an ionosonde, riometer, and GNSS receivers. The multi-instrument observations permitte...
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ftdoajarticles:oai:doaj.org/article:83c87611eb9748ba873ee7296d040885 2023-05-15T13:57:56+02:00 Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors E. Correia L. Spogli L. Alfonsi C. Cesaroni A. M. Gulisano E. G. Thomas R. F. H. Ramirez A. A. Rodel 2017-10-01T00:00:00Z https://doi.org/10.5194/angeo-35-1113-2017 https://doaj.org/article/83c87611eb9748ba873ee7296d040885 EN eng Copernicus Publications https://www.ann-geophys.net/35/1113/2017/angeo-35-1113-2017.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-35-1113-2017 0992-7689 1432-0576 https://doaj.org/article/83c87611eb9748ba873ee7296d040885 Annales Geophysicae, Vol 35, Pp 1113-1129 (2017) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2017 ftdoajarticles https://doi.org/10.5194/angeo-35-1113-2017 2022-12-31T06:17:09Z The ionospheric response at middle and high latitudes in the Antarctica American and Australian sectors to the 26–27 September 2011 moderately intense geomagnetic storm was investigated using instruments including an ionosonde, riometer, and GNSS receivers. The multi-instrument observations permitted us to characterize the ionospheric storm-enhanced density (SED) and tongues of ionization (TOIs) as a function of storm time and location, considering the effect of prompt penetration electric fields (PPEFs). During the main phase of the geomagnetic storm, dayside SEDs were observed at middle latitudes, and in the nightside only density depletions were observed from middle to high latitudes. Both the increase and decrease in ionospheric density at middle latitudes can be attributed to a combination of processes, including the PPEF effect just after the storm onset, dominated by disturbance dynamo processes during the evolution of the main phase. Two SEDs–TOIs were identified in the Southern Hemisphere, but only the first episode had a counterpart in the Northern Hemisphere. This difference can be explained by the interhemispheric asymmetry caused by the high-latitude coupling between solar wind and the magnetosphere, which drives the dawn-to-dusk component of the interplanetary magnetic field. The formation of polar TOI is a function of the SED plume location that might be near the dayside cusp from which it can enter the polar cap, which was the case in the Southern Hemisphere. Strong GNSS scintillations were observed at stations collocated with SED plumes at middle latitudes and cusp on the dayside and at polar cap TOIs on the nightside. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 35 5 1113 1129 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
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Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 E. Correia L. Spogli L. Alfonsi C. Cesaroni A. M. Gulisano E. G. Thomas R. F. H. Ramirez A. A. Rodel Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The ionospheric response at middle and high latitudes in the Antarctica American and Australian sectors to the 26–27 September 2011 moderately intense geomagnetic storm was investigated using instruments including an ionosonde, riometer, and GNSS receivers. The multi-instrument observations permitted us to characterize the ionospheric storm-enhanced density (SED) and tongues of ionization (TOIs) as a function of storm time and location, considering the effect of prompt penetration electric fields (PPEFs). During the main phase of the geomagnetic storm, dayside SEDs were observed at middle latitudes, and in the nightside only density depletions were observed from middle to high latitudes. Both the increase and decrease in ionospheric density at middle latitudes can be attributed to a combination of processes, including the PPEF effect just after the storm onset, dominated by disturbance dynamo processes during the evolution of the main phase. Two SEDs–TOIs were identified in the Southern Hemisphere, but only the first episode had a counterpart in the Northern Hemisphere. This difference can be explained by the interhemispheric asymmetry caused by the high-latitude coupling between solar wind and the magnetosphere, which drives the dawn-to-dusk component of the interplanetary magnetic field. The formation of polar TOI is a function of the SED plume location that might be near the dayside cusp from which it can enter the polar cap, which was the case in the Southern Hemisphere. Strong GNSS scintillations were observed at stations collocated with SED plumes at middle latitudes and cusp on the dayside and at polar cap TOIs on the nightside. |
format |
Article in Journal/Newspaper |
author |
E. Correia L. Spogli L. Alfonsi C. Cesaroni A. M. Gulisano E. G. Thomas R. F. H. Ramirez A. A. Rodel |
author_facet |
E. Correia L. Spogli L. Alfonsi C. Cesaroni A. M. Gulisano E. G. Thomas R. F. H. Ramirez A. A. Rodel |
author_sort |
E. Correia |
title |
Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors |
title_short |
Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors |
title_full |
Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors |
title_fullStr |
Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors |
title_full_unstemmed |
Ionospheric F-region response to the 26 September 2011 geomagnetic storm in the Antarctica American and Australian sectors |
title_sort |
ionospheric f-region response to the 26 september 2011 geomagnetic storm in the antarctica american and australian sectors |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/angeo-35-1113-2017 https://doaj.org/article/83c87611eb9748ba873ee7296d040885 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Annales Geophysicae, Vol 35, Pp 1113-1129 (2017) |
op_relation |
https://www.ann-geophys.net/35/1113/2017/angeo-35-1113-2017.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-35-1113-2017 0992-7689 1432-0576 https://doaj.org/article/83c87611eb9748ba873ee7296d040885 |
op_doi |
https://doi.org/10.5194/angeo-35-1113-2017 |
container_title |
Annales Geophysicae |
container_volume |
35 |
container_issue |
5 |
container_start_page |
1113 |
op_container_end_page |
1129 |
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1766265866474749952 |