Substorm induced energetic electron precipitation:morphology and prediction
The injection, and subsequent precipitation, of 20 to 300 keV electrons during substorms is modeled using parameters of a typical substorm found in the literature. When combined with onset timing from, for example, the SuperMAG substorm database, or the Minimal Substorm Model, it may be used to calc...
Published in: | Journal of Geophysical Research: Space Physics |
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ftulancaster:oai:eprints.lancs.ac.uk:74047 2023-08-27T04:10:24+02:00 Substorm induced energetic electron precipitation:morphology and prediction Beharrell, Mat Honary, Farideh Rodger, Craig J. Clilverd, Mark A. 2015-04-06 application/pdf https://eprints.lancs.ac.uk/id/eprint/74047/ https://eprints.lancs.ac.uk/id/eprint/74047/1/jgra51679.pdf https://doi.org/10.1002/2014JA020632 en eng https://eprints.lancs.ac.uk/id/eprint/74047/1/jgra51679.pdf Beharrell, Mat and Honary, Farideh and Rodger, Craig J. and Clilverd, Mark A. (2015) Substorm induced energetic electron precipitation:morphology and prediction. Journal of Geophysical Research: Space Physics, 120 (4). pp. 2993-3008. ISSN 2169-9402 creative_commons_attribution_4_0_international_license Journal Article PeerReviewed 2015 ftulancaster https://doi.org/10.1002/2014JA020632 2023-08-03T22:27:38Z The injection, and subsequent precipitation, of 20 to 300 keV electrons during substorms is modeled using parameters of a typical substorm found in the literature. When combined with onset timing from, for example, the SuperMAG substorm database, or the Minimal Substorm Model, it may be used to calculate substorm contributions to energetic electron precipitation in atmospheric chemistry and climate models. Here the results are compared to ground-based data from the Imaging Riometer for Ionospheric Studies riometer in Kilpisjärvi, Finland, and the narrowband subionospheric VLF receiver at Sodankylä, Finland. Qualitatively, the model reproduces the observations well when only onset timing from the SuperMAG network of magnetometers is used as an input and is capable of reproducing all four categories of substorm associated riometer spike events. The results suggest that the different types of spike event are the same phenomena observed at different locations, with each type emerging from the model results at a different local time, relative to the center of the injection region. The model's ability to reproduce the morphology of spike events more accurately than previous models is attributed to the injection of energetic electrons being concentrated specifically in the regions undergoing dipolarization, instead of uniformly across a single-injection region. Article in Journal/Newspaper Kilpisjärvi Sodankylä Lancaster University: Lancaster Eprints Kilpisjärvi ENVELOPE(20.767,20.767,69.034,69.034) Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) Journal of Geophysical Research: Space Physics 120 4 2993 3008 |
institution |
Open Polar |
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Lancaster University: Lancaster Eprints |
op_collection_id |
ftulancaster |
language |
English |
description |
The injection, and subsequent precipitation, of 20 to 300 keV electrons during substorms is modeled using parameters of a typical substorm found in the literature. When combined with onset timing from, for example, the SuperMAG substorm database, or the Minimal Substorm Model, it may be used to calculate substorm contributions to energetic electron precipitation in atmospheric chemistry and climate models. Here the results are compared to ground-based data from the Imaging Riometer for Ionospheric Studies riometer in Kilpisjärvi, Finland, and the narrowband subionospheric VLF receiver at Sodankylä, Finland. Qualitatively, the model reproduces the observations well when only onset timing from the SuperMAG network of magnetometers is used as an input and is capable of reproducing all four categories of substorm associated riometer spike events. The results suggest that the different types of spike event are the same phenomena observed at different locations, with each type emerging from the model results at a different local time, relative to the center of the injection region. The model's ability to reproduce the morphology of spike events more accurately than previous models is attributed to the injection of energetic electrons being concentrated specifically in the regions undergoing dipolarization, instead of uniformly across a single-injection region. |
format |
Article in Journal/Newspaper |
author |
Beharrell, Mat Honary, Farideh Rodger, Craig J. Clilverd, Mark A. |
spellingShingle |
Beharrell, Mat Honary, Farideh Rodger, Craig J. Clilverd, Mark A. Substorm induced energetic electron precipitation:morphology and prediction |
author_facet |
Beharrell, Mat Honary, Farideh Rodger, Craig J. Clilverd, Mark A. |
author_sort |
Beharrell, Mat |
title |
Substorm induced energetic electron precipitation:morphology and prediction |
title_short |
Substorm induced energetic electron precipitation:morphology and prediction |
title_full |
Substorm induced energetic electron precipitation:morphology and prediction |
title_fullStr |
Substorm induced energetic electron precipitation:morphology and prediction |
title_full_unstemmed |
Substorm induced energetic electron precipitation:morphology and prediction |
title_sort |
substorm induced energetic electron precipitation:morphology and prediction |
publishDate |
2015 |
url |
https://eprints.lancs.ac.uk/id/eprint/74047/ https://eprints.lancs.ac.uk/id/eprint/74047/1/jgra51679.pdf https://doi.org/10.1002/2014JA020632 |
long_lat |
ENVELOPE(20.767,20.767,69.034,69.034) ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Kilpisjärvi Sodankylä |
geographic_facet |
Kilpisjärvi Sodankylä |
genre |
Kilpisjärvi Sodankylä |
genre_facet |
Kilpisjärvi Sodankylä |
op_relation |
https://eprints.lancs.ac.uk/id/eprint/74047/1/jgra51679.pdf Beharrell, Mat and Honary, Farideh and Rodger, Craig J. and Clilverd, Mark A. (2015) Substorm induced energetic electron precipitation:morphology and prediction. Journal of Geophysical Research: Space Physics, 120 (4). pp. 2993-3008. ISSN 2169-9402 |
op_rights |
creative_commons_attribution_4_0_international_license |
op_doi |
https://doi.org/10.1002/2014JA020632 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
120 |
container_issue |
4 |
container_start_page |
2993 |
op_container_end_page |
3008 |
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1775352405137817600 |