Occurrence of polar mesosphere summer echoes at very high latitudes
Observations of polar mesosphere summer echoes (PMSE) have been carried out during the summer periodes 1999–2001 and 2003–2004 at the very high latitude of 78° N using the SOUSY Svalbard Radar (53.5 MHz) at Longyearbyen. Although the measurements could not be done continuously in these seasons, PMSE...
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ftdoajarticles:oai:doaj.org/article:fefe331304544d1b82463c6c8955f399 2023-05-15T17:08:31+02:00 Occurrence of polar mesosphere summer echoes at very high latitudes M. Zecha J. Röttger 2009-03-01T00:00:00Z https://doi.org/10.5194/angeo-27-1331-2009 https://doaj.org/article/fefe331304544d1b82463c6c8955f399 EN eng Copernicus Publications https://www.ann-geophys.net/27/1331/2009/angeo-27-1331-2009.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-27-1331-2009 0992-7689 1432-0576 https://doaj.org/article/fefe331304544d1b82463c6c8955f399 Annales Geophysicae, Vol 27, Pp 1331-1342 (2009) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2009 ftdoajarticles https://doi.org/10.5194/angeo-27-1331-2009 2022-12-31T06:24:29Z Observations of polar mesosphere summer echoes (PMSE) have been carried out during the summer periodes 1999–2001 and 2003–2004 at the very high latitude of 78° N using the SOUSY Svalbard Radar (53.5 MHz) at Longyearbyen. Although the measurements could not be done continuously in these seasons, PMSE have been detected over more than 6600 h of 9300 h of observation time overall. Using this data base, particular PMSE occurrence characteristics have been determined. PMSE at Svalbard appear from the middle of May to the end of August with an almost permanent total occurrence in June and July. Diurnal variations are observable in the height-depend occurrence rates and in PMSE thickness, they show a maximum around 09:00–10:00 UTC and a minimum around 21:00–22:00 UTC. PMSE occur nearly exclusively between a height of 80 km and 92 km with a maximum near 85 km. However, PMSE appear not simultaneously over the entire height range, the mean vertical PMSE extension is around 4–6 km in June and July. Furthermore, typically PMSE are separated into several layers, and only 30% of all PMSE are single layers. The probability of multiple layers is greater in June and July than at the beginning and the end of the PMSE season and shows a marked 5-day-variation. The same variation is noticeable in the seasonal dependence of the PMSE occurrence and the PMSE thickness. We finally discuss potential geophysical processes to explain our observational results. Article in Journal/Newspaper Longyearbyen Svalbard Directory of Open Access Journals: DOAJ Articles Longyearbyen Svalbard Annales Geophysicae 27 3 1331 1342 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 M. Zecha J. Röttger Occurrence of polar mesosphere summer echoes at very high latitudes |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Observations of polar mesosphere summer echoes (PMSE) have been carried out during the summer periodes 1999–2001 and 2003–2004 at the very high latitude of 78° N using the SOUSY Svalbard Radar (53.5 MHz) at Longyearbyen. Although the measurements could not be done continuously in these seasons, PMSE have been detected over more than 6600 h of 9300 h of observation time overall. Using this data base, particular PMSE occurrence characteristics have been determined. PMSE at Svalbard appear from the middle of May to the end of August with an almost permanent total occurrence in June and July. Diurnal variations are observable in the height-depend occurrence rates and in PMSE thickness, they show a maximum around 09:00–10:00 UTC and a minimum around 21:00–22:00 UTC. PMSE occur nearly exclusively between a height of 80 km and 92 km with a maximum near 85 km. However, PMSE appear not simultaneously over the entire height range, the mean vertical PMSE extension is around 4–6 km in June and July. Furthermore, typically PMSE are separated into several layers, and only 30% of all PMSE are single layers. The probability of multiple layers is greater in June and July than at the beginning and the end of the PMSE season and shows a marked 5-day-variation. The same variation is noticeable in the seasonal dependence of the PMSE occurrence and the PMSE thickness. We finally discuss potential geophysical processes to explain our observational results. |
format |
Article in Journal/Newspaper |
author |
M. Zecha J. Röttger |
author_facet |
M. Zecha J. Röttger |
author_sort |
M. Zecha |
title |
Occurrence of polar mesosphere summer echoes at very high latitudes |
title_short |
Occurrence of polar mesosphere summer echoes at very high latitudes |
title_full |
Occurrence of polar mesosphere summer echoes at very high latitudes |
title_fullStr |
Occurrence of polar mesosphere summer echoes at very high latitudes |
title_full_unstemmed |
Occurrence of polar mesosphere summer echoes at very high latitudes |
title_sort |
occurrence of polar mesosphere summer echoes at very high latitudes |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doi.org/10.5194/angeo-27-1331-2009 https://doaj.org/article/fefe331304544d1b82463c6c8955f399 |
geographic |
Longyearbyen Svalbard |
geographic_facet |
Longyearbyen Svalbard |
genre |
Longyearbyen Svalbard |
genre_facet |
Longyearbyen Svalbard |
op_source |
Annales Geophysicae, Vol 27, Pp 1331-1342 (2009) |
op_relation |
https://www.ann-geophys.net/27/1331/2009/angeo-27-1331-2009.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-27-1331-2009 0992-7689 1432-0576 https://doaj.org/article/fefe331304544d1b82463c6c8955f399 |
op_doi |
https://doi.org/10.5194/angeo-27-1331-2009 |
container_title |
Annales Geophysicae |
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27 |
container_issue |
3 |
container_start_page |
1331 |
op_container_end_page |
1342 |
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