An optical study of multiple NEIAL events driven by low energy electron precipitation
Optical data are compared with EISCAT radar observations of multiple Naturally Enhanced Ion-Acoustic Line (NEIAL) events in the dayside cusp. This study uses narrow field of view cameras to observe small-scale, short-lived auroral features. Using multiple-wavelength optical observations, a direct li...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2008
|
Subjects: | |
Online Access: | https://doi.org/10.5194/angeo-26-2435-2008 https://noa.gwlb.de/receive/cop_mods_00031190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031144/angeo-26-2435-2008.pdf https://angeo.copernicus.org/articles/26/2435/2008/angeo-26-2435-2008.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00031190 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00031190 2023-05-15T16:04:39+02:00 An optical study of multiple NEIAL events driven by low energy electron precipitation Sullivan, J. M. Lockwood, M. Lanchester, B. S. Kontar, E. P. Ivchenko, N. Dahlgren, H. Whiter, D. K. 2008-08 electronic https://doi.org/10.5194/angeo-26-2435-2008 https://noa.gwlb.de/receive/cop_mods_00031190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031144/angeo-26-2435-2008.pdf https://angeo.copernicus.org/articles/26/2435/2008/angeo-26-2435-2008.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-26-2435-2008 https://noa.gwlb.de/receive/cop_mods_00031190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031144/angeo-26-2435-2008.pdf https://angeo.copernicus.org/articles/26/2435/2008/angeo-26-2435-2008.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2008 ftnonlinearchiv https://doi.org/10.5194/angeo-26-2435-2008 2022-02-08T22:46:52Z Optical data are compared with EISCAT radar observations of multiple Naturally Enhanced Ion-Acoustic Line (NEIAL) events in the dayside cusp. This study uses narrow field of view cameras to observe small-scale, short-lived auroral features. Using multiple-wavelength optical observations, a direct link between NEIAL occurrences and low energy (about 100 eV) optical emissions is shown. This is consistent with the Langmuir wave decay interpretation of NEIALs being driven by streams of low-energy electrons. Modelling work connected with this study shows that, for the measured ionospheric conditions and precipitation characteristics, growth of unstable Langmuir (electron plasma) waves can occur, which decay into ion-acoustic wave modes. The link with low energy optical emissions shown here, will enable future studies of the shape, extent, lifetime, grouping and motions of NEIALs. Article in Journal/Newspaper EISCAT Niedersächsisches Online-Archiv NOA Langmuir ENVELOPE(-67.150,-67.150,-66.967,-66.967) Annales Geophysicae 26 8 2435 2447 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Sullivan, J. M. Lockwood, M. Lanchester, B. S. Kontar, E. P. Ivchenko, N. Dahlgren, H. Whiter, D. K. An optical study of multiple NEIAL events driven by low energy electron precipitation |
topic_facet |
article Verlagsveröffentlichung |
description |
Optical data are compared with EISCAT radar observations of multiple Naturally Enhanced Ion-Acoustic Line (NEIAL) events in the dayside cusp. This study uses narrow field of view cameras to observe small-scale, short-lived auroral features. Using multiple-wavelength optical observations, a direct link between NEIAL occurrences and low energy (about 100 eV) optical emissions is shown. This is consistent with the Langmuir wave decay interpretation of NEIALs being driven by streams of low-energy electrons. Modelling work connected with this study shows that, for the measured ionospheric conditions and precipitation characteristics, growth of unstable Langmuir (electron plasma) waves can occur, which decay into ion-acoustic wave modes. The link with low energy optical emissions shown here, will enable future studies of the shape, extent, lifetime, grouping and motions of NEIALs. |
format |
Article in Journal/Newspaper |
author |
Sullivan, J. M. Lockwood, M. Lanchester, B. S. Kontar, E. P. Ivchenko, N. Dahlgren, H. Whiter, D. K. |
author_facet |
Sullivan, J. M. Lockwood, M. Lanchester, B. S. Kontar, E. P. Ivchenko, N. Dahlgren, H. Whiter, D. K. |
author_sort |
Sullivan, J. M. |
title |
An optical study of multiple NEIAL events driven by low energy electron precipitation |
title_short |
An optical study of multiple NEIAL events driven by low energy electron precipitation |
title_full |
An optical study of multiple NEIAL events driven by low energy electron precipitation |
title_fullStr |
An optical study of multiple NEIAL events driven by low energy electron precipitation |
title_full_unstemmed |
An optical study of multiple NEIAL events driven by low energy electron precipitation |
title_sort |
optical study of multiple neial events driven by low energy electron precipitation |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-2435-2008 https://noa.gwlb.de/receive/cop_mods_00031190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031144/angeo-26-2435-2008.pdf https://angeo.copernicus.org/articles/26/2435/2008/angeo-26-2435-2008.pdf |
long_lat |
ENVELOPE(-67.150,-67.150,-66.967,-66.967) |
geographic |
Langmuir |
geographic_facet |
Langmuir |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-26-2435-2008 https://noa.gwlb.de/receive/cop_mods_00031190 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031144/angeo-26-2435-2008.pdf https://angeo.copernicus.org/articles/26/2435/2008/angeo-26-2435-2008.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-26-2435-2008 |
container_title |
Annales Geophysicae |
container_volume |
26 |
container_issue |
8 |
container_start_page |
2435 |
op_container_end_page |
2447 |
_version_ |
1766400264307212288 |