Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements
Spectra measured by incoherent scatter radars are formed predominantly by scattering of the incident signal off ion-acoustic and Langmuir waves in the ionosphere. Occasionally, the upshifted and/or downshifted lines produced by the ion-acoustic waves are enhanced well above thermal levels and referr...
Published in: | Annales Geophysicae |
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00028831 2023-05-15T16:04:41+02:00 Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements Ekeberg, J. Wannberg, G. Eliasson, L. Stasiewicz, K. 2010-06 electronic https://doi.org/10.5194/angeo-28-1299-2010 https://noa.gwlb.de/receive/cop_mods_00028831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028786/angeo-28-1299-2010.pdf https://angeo.copernicus.org/articles/28/1299/2010/angeo-28-1299-2010.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-28-1299-2010 https://noa.gwlb.de/receive/cop_mods_00028831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028786/angeo-28-1299-2010.pdf https://angeo.copernicus.org/articles/28/1299/2010/angeo-28-1299-2010.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2010 ftnonlinearchiv https://doi.org/10.5194/angeo-28-1299-2010 2022-02-08T22:48:00Z Spectra measured by incoherent scatter radars are formed predominantly by scattering of the incident signal off ion-acoustic and Langmuir waves in the ionosphere. Occasionally, the upshifted and/or downshifted lines produced by the ion-acoustic waves are enhanced well above thermal levels and referred to as naturally enhanced ion-acoustic lines. In this paper, we study another kind of enhancement, which is spectrally uniform over the whole ion-line, i.e. the up- and downshifted shoulder and the spectral valley in between. Based on observations made with the EISCAT Svalbard radar (ESR) facility, we investigate the transient and spectrally uniform power enhancements, which can be explained by ion-acoustic solitary waves. We use a theory of nonlinear waves in a magnetized plasma to determine the properties of such waves and evaluate their effects on scattered signals measured by ESR. We suggest a new mechanism that can explain backscattered power enhancements by one order of magnitude above the thermal level and show that it is consistent with observations. Article in Journal/Newspaper EISCAT Svalbard Niedersächsisches Online-Archiv NOA Langmuir ENVELOPE(-67.150,-67.150,-66.967,-66.967) Svalbard Annales Geophysicae 28 6 1299 1306 |
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English |
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article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Ekeberg, J. Wannberg, G. Eliasson, L. Stasiewicz, K. Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements |
topic_facet |
article Verlagsveröffentlichung |
description |
Spectra measured by incoherent scatter radars are formed predominantly by scattering of the incident signal off ion-acoustic and Langmuir waves in the ionosphere. Occasionally, the upshifted and/or downshifted lines produced by the ion-acoustic waves are enhanced well above thermal levels and referred to as naturally enhanced ion-acoustic lines. In this paper, we study another kind of enhancement, which is spectrally uniform over the whole ion-line, i.e. the up- and downshifted shoulder and the spectral valley in between. Based on observations made with the EISCAT Svalbard radar (ESR) facility, we investigate the transient and spectrally uniform power enhancements, which can be explained by ion-acoustic solitary waves. We use a theory of nonlinear waves in a magnetized plasma to determine the properties of such waves and evaluate their effects on scattered signals measured by ESR. We suggest a new mechanism that can explain backscattered power enhancements by one order of magnitude above the thermal level and show that it is consistent with observations. |
format |
Article in Journal/Newspaper |
author |
Ekeberg, J. Wannberg, G. Eliasson, L. Stasiewicz, K. |
author_facet |
Ekeberg, J. Wannberg, G. Eliasson, L. Stasiewicz, K. |
author_sort |
Ekeberg, J. |
title |
Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements |
title_short |
Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements |
title_full |
Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements |
title_fullStr |
Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements |
title_full_unstemmed |
Ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements |
title_sort |
ion-acoustic solitary waves and spectrally uniform scattering cross section enhancements |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/angeo-28-1299-2010 https://noa.gwlb.de/receive/cop_mods_00028831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028786/angeo-28-1299-2010.pdf https://angeo.copernicus.org/articles/28/1299/2010/angeo-28-1299-2010.pdf |
long_lat |
ENVELOPE(-67.150,-67.150,-66.967,-66.967) |
geographic |
Langmuir Svalbard |
geographic_facet |
Langmuir Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
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-28-1299-2010 https://noa.gwlb.de/receive/cop_mods_00028831 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028786/angeo-28-1299-2010.pdf https://angeo.copernicus.org/articles/28/1299/2010/angeo-28-1299-2010.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-28-1299-2010 |
container_title |
Annales Geophysicae |
container_volume |
28 |
container_issue |
6 |
container_start_page |
1299 |
op_container_end_page |
1306 |
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1766400300587941888 |