Is there a causal relationship between cosmic noise absorption and PMSE?
Copyright 2005 by the American Geophysical Union. We report on the first Southern Hemisphere comparison between polar mesosphere summer echoes (PMSE) and cosmic noise absorption (CNA). Observations were obtained during the austral summer of 2003–2004 from a 55 MHz MST radar, a 38.2 MHz imaging riome...
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Online Access: | http://hdl.handle.net/2440/17899 https://doi.org/10.1029/2005GL024568 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/17899 2023-05-15T13:37:13+02:00 Is there a causal relationship between cosmic noise absorption and PMSE? Morris, Ray James Terkildsen, Michael B. Holdsworth, David A. Hyde, Mike R. School of Chemistry and Physics : Physics and Mathematical Physics 2005 http://hdl.handle.net/2440/17899 https://doi.org/10.1029/2005GL024568 en eng American Geophysical Union Geophysical Research Letters, 2005; 32 (L24809):1-4 0094-8276 http://hdl.handle.net/2440/17899 doi:10.1029/2005GL024568 http://www.agu.org/pubs/crossref/2005./2005GL024568.shtml Journal article 2005 ftunivadelaidedl https://doi.org/10.1029/2005GL024568 2023-02-06T06:55:07Z Copyright 2005 by the American Geophysical Union. We report on the first Southern Hemisphere comparison between polar mesosphere summer echoes (PMSE) and cosmic noise absorption (CNA). Observations were obtained during the austral summer of 2003–2004 from a 55 MHz MST radar, a 38.2 MHz imaging riometer and a 30 MHz standard riometer all co-located at Davis, Antarctica (68.6°S). Case study PMSE events suggest that CNA plays a role in the intensification of established dayside PMSE possibly linked with soft electron precipitation from the polar cusp, and indeed with a similar effect and moreover with the creation of night-side PMSE connected with hard auroral electron precipitation. Although Pearson correlation coefficients are not that high (i.e., 0.423), Spearman rank correlation coefficients of 0.315, with 123 degrees of freedom well above the 99% confidence limits, established that a weak correlation between CNA and PMSE intensity exists. We use this result to discuss two unexplained properties of PMSE: (i) diurnal minimum near ∼15–21 UT; and (ii) non-linear intensity variation as a function of latitude. Surprisingly, this study presents only the second analysis of this kind using co-located instruments. Ray J. Morris, Michael B. Terkildsen, David A. Holdsworth, Mike R. Hyde Article in Journal/Newspaper Antarc* Antarctica The University of Adelaide: Digital Library Austral Holdsworth ENVELOPE(166.583,166.583,-72.133,-72.133) Geophysical Research Letters 32 24 |
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Open Polar |
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The University of Adelaide: Digital Library |
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ftunivadelaidedl |
language |
English |
description |
Copyright 2005 by the American Geophysical Union. We report on the first Southern Hemisphere comparison between polar mesosphere summer echoes (PMSE) and cosmic noise absorption (CNA). Observations were obtained during the austral summer of 2003–2004 from a 55 MHz MST radar, a 38.2 MHz imaging riometer and a 30 MHz standard riometer all co-located at Davis, Antarctica (68.6°S). Case study PMSE events suggest that CNA plays a role in the intensification of established dayside PMSE possibly linked with soft electron precipitation from the polar cusp, and indeed with a similar effect and moreover with the creation of night-side PMSE connected with hard auroral electron precipitation. Although Pearson correlation coefficients are not that high (i.e., 0.423), Spearman rank correlation coefficients of 0.315, with 123 degrees of freedom well above the 99% confidence limits, established that a weak correlation between CNA and PMSE intensity exists. We use this result to discuss two unexplained properties of PMSE: (i) diurnal minimum near ∼15–21 UT; and (ii) non-linear intensity variation as a function of latitude. Surprisingly, this study presents only the second analysis of this kind using co-located instruments. Ray J. Morris, Michael B. Terkildsen, David A. Holdsworth, Mike R. Hyde |
author2 |
School of Chemistry and Physics : Physics and Mathematical Physics |
format |
Article in Journal/Newspaper |
author |
Morris, Ray James Terkildsen, Michael B. Holdsworth, David A. Hyde, Mike R. |
spellingShingle |
Morris, Ray James Terkildsen, Michael B. Holdsworth, David A. Hyde, Mike R. Is there a causal relationship between cosmic noise absorption and PMSE? |
author_facet |
Morris, Ray James Terkildsen, Michael B. Holdsworth, David A. Hyde, Mike R. |
author_sort |
Morris, Ray James |
title |
Is there a causal relationship between cosmic noise absorption and PMSE? |
title_short |
Is there a causal relationship between cosmic noise absorption and PMSE? |
title_full |
Is there a causal relationship between cosmic noise absorption and PMSE? |
title_fullStr |
Is there a causal relationship between cosmic noise absorption and PMSE? |
title_full_unstemmed |
Is there a causal relationship between cosmic noise absorption and PMSE? |
title_sort |
is there a causal relationship between cosmic noise absorption and pmse? |
publisher |
American Geophysical Union |
publishDate |
2005 |
url |
http://hdl.handle.net/2440/17899 https://doi.org/10.1029/2005GL024568 |
long_lat |
ENVELOPE(166.583,166.583,-72.133,-72.133) |
geographic |
Austral Holdsworth |
geographic_facet |
Austral Holdsworth |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://www.agu.org/pubs/crossref/2005./2005GL024568.shtml |
op_relation |
Geophysical Research Letters, 2005; 32 (L24809):1-4 0094-8276 http://hdl.handle.net/2440/17899 doi:10.1029/2005GL024568 |
op_doi |
https://doi.org/10.1029/2005GL024568 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
24 |
_version_ |
1766089394443255808 |