On the validity of the ambipolar diffusion assumption in the polar mesopause region
The decay of underdense meteor trails in the polar mesopause region is thought to be predominantly due to ambipolar diffusion, a process governed by the ambient temperature and pressure. Hence, observations of meteor decay times have been used to indirectly measure the temperature of the mesopause r...
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Copernicus Publications
2008
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00030932 2023-05-15T17:44:33+02:00 On the validity of the ambipolar diffusion assumption in the polar mesopause region Ballinger, A. P. Chilson, P. B. Palmer, R. D. Mitchell, N. J. 2008-11 electronic https://doi.org/10.5194/angeo-26-3439-2008 https://noa.gwlb.de/receive/cop_mods_00030932 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030886/angeo-26-3439-2008.pdf https://angeo.copernicus.org/articles/26/3439/2008/angeo-26-3439-2008.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-26-3439-2008 https://noa.gwlb.de/receive/cop_mods_00030932 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030886/angeo-26-3439-2008.pdf https://angeo.copernicus.org/articles/26/3439/2008/angeo-26-3439-2008.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2008 ftnonlinearchiv https://doi.org/10.5194/angeo-26-3439-2008 2022-02-08T22:46:57Z The decay of underdense meteor trails in the polar mesopause region is thought to be predominantly due to ambipolar diffusion, a process governed by the ambient temperature and pressure. Hence, observations of meteor decay times have been used to indirectly measure the temperature of the mesopause region. Using meteor observations from a SKiYMET radar in northern Sweden during 2005, this study found that weaker meteor trails have shorter decay times (on average) than relatively stronger trails. This suggests that processes other than ambipolar diffusion can play a significant role in trail diffusion. One particular mechanism, namely electron-ion recombination, is explored. This process is dependent on the initial electron density within the meteor trail, and can lead to a disproportionate reduction in decay time, depending on the strength of the meteor. Article in Journal/Newspaper Northern Sweden Niedersächsisches Online-Archiv NOA Annales Geophysicae 26 11 3439 3443 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Ballinger, A. P. Chilson, P. B. Palmer, R. D. Mitchell, N. J. On the validity of the ambipolar diffusion assumption in the polar mesopause region |
topic_facet |
article Verlagsveröffentlichung |
description |
The decay of underdense meteor trails in the polar mesopause region is thought to be predominantly due to ambipolar diffusion, a process governed by the ambient temperature and pressure. Hence, observations of meteor decay times have been used to indirectly measure the temperature of the mesopause region. Using meteor observations from a SKiYMET radar in northern Sweden during 2005, this study found that weaker meteor trails have shorter decay times (on average) than relatively stronger trails. This suggests that processes other than ambipolar diffusion can play a significant role in trail diffusion. One particular mechanism, namely electron-ion recombination, is explored. This process is dependent on the initial electron density within the meteor trail, and can lead to a disproportionate reduction in decay time, depending on the strength of the meteor. |
format |
Article in Journal/Newspaper |
author |
Ballinger, A. P. Chilson, P. B. Palmer, R. D. Mitchell, N. J. |
author_facet |
Ballinger, A. P. Chilson, P. B. Palmer, R. D. Mitchell, N. J. |
author_sort |
Ballinger, A. P. |
title |
On the validity of the ambipolar diffusion assumption in the polar mesopause region |
title_short |
On the validity of the ambipolar diffusion assumption in the polar mesopause region |
title_full |
On the validity of the ambipolar diffusion assumption in the polar mesopause region |
title_fullStr |
On the validity of the ambipolar diffusion assumption in the polar mesopause region |
title_full_unstemmed |
On the validity of the ambipolar diffusion assumption in the polar mesopause region |
title_sort |
on the validity of the ambipolar diffusion assumption in the polar mesopause region |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-3439-2008 https://noa.gwlb.de/receive/cop_mods_00030932 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030886/angeo-26-3439-2008.pdf https://angeo.copernicus.org/articles/26/3439/2008/angeo-26-3439-2008.pdf |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
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-26-3439-2008 https://noa.gwlb.de/receive/cop_mods_00030932 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030886/angeo-26-3439-2008.pdf https://angeo.copernicus.org/articles/26/3439/2008/angeo-26-3439-2008.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-26-3439-2008 |
container_title |
Annales Geophysicae |
container_volume |
26 |
container_issue |
11 |
container_start_page |
3439 |
op_container_end_page |
3443 |
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1766146784422264832 |