Real-time determination and monitoring of the auroral electrojet boundaries
A method for nowcasting of the auroral electrojet location from real-time geomagnetic data in the European sector is presented. Along the auroral ovals strong electrojet currents are flowing. The variation in the geomagnetic field caused by these auroral electrojets is observed on a routine basis at...
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Online Access: | https://hdl.handle.net/10037/5703 https://doi.org/10.1051/swsc/2013050 |
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ftunivtroemsoe:oai:munin.uit.no:10037/5703 2023-05-15T18:34:44+02:00 Real-time determination and monitoring of the auroral electrojet boundaries Johnsen, Magnar Gullikstad 2013 https://hdl.handle.net/10037/5703 https://doi.org/10.1051/swsc/2013050 eng eng Journal of Space Weather and Space Climate 3(2013) FRIDAID 1034428 http://dx.doi.org/10.1051/swsc/2013050 2115-7251 https://hdl.handle.net/10037/5703 URN:NBN:no-uit_munin_5396 openAccess VDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 Journal article Tidsskriftartikkel Peer reviewed 2013 ftunivtroemsoe https://doi.org/10.1051/swsc/2013050 2021-06-25T17:53:39Z A method for nowcasting of the auroral electrojet location from real-time geomagnetic data in the European sector is presented. Along the auroral ovals strong electrojet currents are flowing. The variation in the geomagnetic field caused by these auroral electrojets is observed on a routine basis at high latitudes using ground-based magnetometers. From latitude profiles of the vertical component of these variations it is possible to identify the boundaries of the electrojets. Using realtime data from ground magnetometer chains is the only existing method for continuous monitoring and nowcasting of the location and strength of the auroral electrojets in a given sector. This is an important aspect of any space weather programme. The method for obtaining the electrojet boundaries is described and assessed in a controlled environment using modelling. Furthermore a provisional, real-time electrojet tracker for the European sector based on data from the Tromsø Geophyiscal Observatory magnetometer chain is presented. The relationship between the electrojet and the diffuse auroral oval is discussed, and it is concluded that although there may exist time-dependent differences in boundary locations, there exists a general coincidence. Furthermore, it is pointed out that knowledge about the latitudinal location of the geomagnetic activity, that is the electrojets, is more critical for space weather sensitive, ground-based technology than the location of the aurora. Article in Journal/Newspaper Tromsø University of Tromsø: Munin Open Research Archive Tromsø Journal of Space Weather and Space Climate 3 A28 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 |
spellingShingle |
VDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 Johnsen, Magnar Gullikstad Real-time determination and monitoring of the auroral electrojet boundaries |
topic_facet |
VDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 |
description |
A method for nowcasting of the auroral electrojet location from real-time geomagnetic data in the European sector is presented. Along the auroral ovals strong electrojet currents are flowing. The variation in the geomagnetic field caused by these auroral electrojets is observed on a routine basis at high latitudes using ground-based magnetometers. From latitude profiles of the vertical component of these variations it is possible to identify the boundaries of the electrojets. Using realtime data from ground magnetometer chains is the only existing method for continuous monitoring and nowcasting of the location and strength of the auroral electrojets in a given sector. This is an important aspect of any space weather programme. The method for obtaining the electrojet boundaries is described and assessed in a controlled environment using modelling. Furthermore a provisional, real-time electrojet tracker for the European sector based on data from the Tromsø Geophyiscal Observatory magnetometer chain is presented. The relationship between the electrojet and the diffuse auroral oval is discussed, and it is concluded that although there may exist time-dependent differences in boundary locations, there exists a general coincidence. Furthermore, it is pointed out that knowledge about the latitudinal location of the geomagnetic activity, that is the electrojets, is more critical for space weather sensitive, ground-based technology than the location of the aurora. |
format |
Article in Journal/Newspaper |
author |
Johnsen, Magnar Gullikstad |
author_facet |
Johnsen, Magnar Gullikstad |
author_sort |
Johnsen, Magnar Gullikstad |
title |
Real-time determination and monitoring of the auroral electrojet boundaries |
title_short |
Real-time determination and monitoring of the auroral electrojet boundaries |
title_full |
Real-time determination and monitoring of the auroral electrojet boundaries |
title_fullStr |
Real-time determination and monitoring of the auroral electrojet boundaries |
title_full_unstemmed |
Real-time determination and monitoring of the auroral electrojet boundaries |
title_sort |
real-time determination and monitoring of the auroral electrojet boundaries |
publishDate |
2013 |
url |
https://hdl.handle.net/10037/5703 https://doi.org/10.1051/swsc/2013050 |
geographic |
Tromsø |
geographic_facet |
Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_relation |
Journal of Space Weather and Space Climate 3(2013) FRIDAID 1034428 http://dx.doi.org/10.1051/swsc/2013050 2115-7251 https://hdl.handle.net/10037/5703 URN:NBN:no-uit_munin_5396 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1051/swsc/2013050 |
container_title |
Journal of Space Weather and Space Climate |
container_volume |
3 |
container_start_page |
A28 |
_version_ |
1766219633674682368 |