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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Main Authors: Zecha, M., Röttger, J.
Format: Article in Journal/Newspaper
Language:English
Published: München : European Geopyhsical Union 2009
Subjects:
530
Online Access:https://doi.org/10.34657/1615
https://oa.tib.eu/renate/handle/123456789/4038
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spelling ftleibnizopen:oai:oai.leibnizopen.de:CNpQoYoBbHMkKcxzRwHk 2023-10-09T21:53:21+02:00 Occurrence of polar mesosphere summer echoes at very high latitudes Zecha, M. Röttger, J. 2009 application/pdf https://doi.org/10.34657/1615 https://oa.tib.eu/renate/handle/123456789/4038 eng eng München : European Geopyhsical Union CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Annales Geophysicae, Volume 27, Issue 3, Page 1331-1342 Aerosols and particles Atmospheric composition and structure Climatology Meteorology and atmospheric dynamics Middle atmosphere - composition and chemistry aerosol atmospheric chemistry atmospheric dynamics atmospheric structure climatology detection method diurnal variation meteorology middle atmosphere observational method particle size polar mesosphere summer echo Konferenzschrift 530 article Text 2009 ftleibnizopen https://doi.org/10.34657/1615 2023-09-17T23:34:24Z 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. publishedVersion Article in Journal/Newspaper Longyearbyen Svalbard LeibnizOpen (The Leibniz Association) Svalbard Longyearbyen
institution Open Polar
collection LeibnizOpen (The Leibniz Association)
op_collection_id ftleibnizopen
language English
topic Aerosols and particles Atmospheric composition and structure Climatology Meteorology and atmospheric dynamics Middle atmosphere - composition and chemistry
aerosol
atmospheric chemistry
atmospheric dynamics
atmospheric structure
climatology
detection method
diurnal variation
meteorology
middle atmosphere
observational method
particle size
polar mesosphere summer echo
Konferenzschrift
530
spellingShingle Aerosols and particles Atmospheric composition and structure Climatology Meteorology and atmospheric dynamics Middle atmosphere - composition and chemistry
aerosol
atmospheric chemistry
atmospheric dynamics
atmospheric structure
climatology
detection method
diurnal variation
meteorology
middle atmosphere
observational method
particle size
polar mesosphere summer echo
Konferenzschrift
530
Zecha, M.
Röttger, J.
Occurrence of polar mesosphere summer echoes at very high latitudes
topic_facet Aerosols and particles Atmospheric composition and structure Climatology Meteorology and atmospheric dynamics Middle atmosphere - composition and chemistry
aerosol
atmospheric chemistry
atmospheric dynamics
atmospheric structure
climatology
detection method
diurnal variation
meteorology
middle atmosphere
observational method
particle size
polar mesosphere summer echo
Konferenzschrift
530
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. publishedVersion
format Article in Journal/Newspaper
author Zecha, M.
Röttger, J.
author_facet Zecha, M.
Röttger, J.
author_sort Zecha, M.
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 München : European Geopyhsical Union
publishDate 2009
url https://doi.org/10.34657/1615
https://oa.tib.eu/renate/handle/123456789/4038
geographic Svalbard
Longyearbyen
geographic_facet Svalbard
Longyearbyen
genre Longyearbyen
Svalbard
genre_facet Longyearbyen
Svalbard
op_source Annales Geophysicae, Volume 27, Issue 3, Page 1331-1342
op_rights CC BY 3.0 Unported
https://creativecommons.org/licenses/by/3.0/
op_doi https://doi.org/10.34657/1615
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