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...
Published in: | Annales Geophysicae |
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2008
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00030829 2023-05-15T13:25:20+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. 2008-12 electronic https://doi.org/10.5194/angeo-26-4013-2008 https://noa.gwlb.de/receive/cop_mods_00030829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030783/angeo-26-4013-2008.pdf https://angeo.copernicus.org/articles/26/4013/2008/angeo-26-4013-2008.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-26-4013-2008 https://noa.gwlb.de/receive/cop_mods_00030829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030783/angeo-26-4013-2008.pdf https://angeo.copernicus.org/articles/26/4013/2008/angeo-26-4013-2008.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2008 ftnonlinearchiv https://doi.org/10.5194/angeo-26-4013-2008 2022-02-08T22:47:01Z 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. Article in Journal/Newspaper Andenes Niedersächsisches Online-Archiv NOA Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Norway Annales Geophysicae 26 12 4013 4022 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung 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 |
article Verlagsveröffentlichung |
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. |
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 |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-4013-2008 https://noa.gwlb.de/receive/cop_mods_00030829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030783/angeo-26-4013-2008.pdf https://angeo.copernicus.org/articles/26/4013/2008/angeo-26-4013-2008.pdf |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Alomar Norway |
geographic_facet |
Alomar Norway |
genre |
Andenes |
genre_facet |
Andenes |
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-26-4013-2008 https://noa.gwlb.de/receive/cop_mods_00030829 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00030783/angeo-26-4013-2008.pdf https://angeo.copernicus.org/articles/26/4013/2008/angeo-26-4013-2008.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-26-4013-2008 |
container_title |
Annales Geophysicae |
container_volume |
26 |
container_issue |
12 |
container_start_page |
4013 |
op_container_end_page |
4022 |
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1766384748529188864 |