Influence of tides and gravity waves on layering processes in the polar summer mesopause region
Polar Mesosphere Summer Echoes (PMSE) have been studied at Andenes (69° N, 16° E), Norway, using VHF radar observations since 1994. One remarkable feature of these observations is the fact that {during 50% of the time,} the radar echoes occur in the form of two or more distinct layers. In the case o...
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ftleibnizopen:oai:oai.leibnizopen.de:HdJDfYoBNQPDO7WIh2YU 2023-10-09T21:44:32+02:00 Influence of tides and gravity waves on layering processes in the polar summer mesopause region Hoffmann, P. Rapp, M. Fiedler, J. Latteck, R. 2008 application/pdf text/plain; charset=utf-8 https://doi.org/10.34657/4073 https://oa.tib.eu/renate/handle/123456789/5444 eng eng Göttingen : Copernicus CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Annales Geophysicae 26 (2008), 12 atmospheric modeling gravity wave lidar mesopause mesosphere polar mesospheric cloud radar statistical analysis Andenes Andoya Eurasia Europe Northern Europe Norway Scandinavia Vesteralen 550 article Text 2008 ftleibnizopen https://doi.org/10.34657/4073 2023-09-10T23:34:12Z Polar Mesosphere Summer Echoes (PMSE) have been studied at Andenes (69° N, 16° E), Norway, using VHF radar observations since 1994. One remarkable feature of these observations is the fact that {during 50% of the time,} the radar echoes occur in the form of two or more distinct layers. In the case of multiple PMSE layers, statistical analysis shows that the lower layer occurs at a mean height of ∼83.4 km, which is almost identical to the mean height of noctilucent clouds (NLC) derived from observation with the ALOMAR Rayleigh/Mie/Raman lidar at the same site. To investigate the layering processes microphysical model simulations under the influence of tidal and gravity waves were performed. In the presence of long period gravity waves, these model investigations predict an enhanced formation of multiple PMSE layer structures, where the lower layer is a consequence of the occurrence of the largest particles at the bottom of the ice cloud. This explains the coincidence of the lowermost PMSE layers and NLC. During periods with enhanced amplitudes of the semidiurnal tide, the observed NLC and PMSE show pronounced tidal structures comparable to the results of corresponding microphysical simulations. At periods with short period gravity waves there is a tendency for a decreasing occurrence of NLC and for variable weak PMSE structures. publishedVersion Article in Journal/Newspaper Andenes LeibnizOpen (The Leibniz Association) Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Norway |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
atmospheric modeling gravity wave lidar mesopause mesosphere polar mesospheric cloud radar statistical analysis Andenes Andoya Eurasia Europe Northern Europe Norway Scandinavia Vesteralen 550 |
spellingShingle |
atmospheric modeling gravity wave lidar mesopause mesosphere polar mesospheric cloud radar statistical analysis Andenes Andoya Eurasia Europe Northern Europe Norway Scandinavia Vesteralen 550 Hoffmann, P. Rapp, M. Fiedler, J. Latteck, R. Influence of tides and gravity waves on layering processes in the polar summer mesopause region |
topic_facet |
atmospheric modeling gravity wave lidar mesopause mesosphere polar mesospheric cloud radar statistical analysis Andenes Andoya Eurasia Europe Northern Europe Norway Scandinavia Vesteralen 550 |
description |
Polar Mesosphere Summer Echoes (PMSE) have been studied at Andenes (69° N, 16° E), Norway, using VHF radar observations since 1994. One remarkable feature of these observations is the fact that {during 50% of the time,} the radar echoes occur in the form of two or more distinct layers. In the case of multiple PMSE layers, statistical analysis shows that the lower layer occurs at a mean height of ∼83.4 km, which is almost identical to the mean height of noctilucent clouds (NLC) derived from observation with the ALOMAR Rayleigh/Mie/Raman lidar at the same site. To investigate the layering processes microphysical model simulations under the influence of tidal and gravity waves were performed. In the presence of long period gravity waves, these model investigations predict an enhanced formation of multiple PMSE layer structures, where the lower layer is a consequence of the occurrence of the largest particles at the bottom of the ice cloud. This explains the coincidence of the lowermost PMSE layers and NLC. During periods with enhanced amplitudes of the semidiurnal tide, the observed NLC and PMSE show pronounced tidal structures comparable to the results of corresponding microphysical simulations. At periods with short period gravity waves there is a tendency for a decreasing occurrence of NLC and for variable weak PMSE structures. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hoffmann, P. Rapp, M. Fiedler, J. Latteck, R. |
author_facet |
Hoffmann, P. Rapp, M. Fiedler, J. Latteck, R. |
author_sort |
Hoffmann, P. |
title |
Influence of tides and gravity waves on layering processes in the polar summer mesopause region |
title_short |
Influence of tides and gravity waves on layering processes in the polar summer mesopause region |
title_full |
Influence of tides and gravity waves on layering processes in the polar summer mesopause region |
title_fullStr |
Influence of tides and gravity waves on layering processes in the polar summer mesopause region |
title_full_unstemmed |
Influence of tides and gravity waves on layering processes in the polar summer mesopause region |
title_sort |
influence of tides and gravity waves on layering processes in the polar summer mesopause region |
publisher |
Göttingen : Copernicus |
publishDate |
2008 |
url |
https://doi.org/10.34657/4073 https://oa.tib.eu/renate/handle/123456789/5444 |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Alomar Norway |
geographic_facet |
Alomar Norway |
genre |
Andenes |
genre_facet |
Andenes |
op_source |
Annales Geophysicae 26 (2008), 12 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.34657/4073 |
_version_ |
1779311035333738496 |