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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ftdoajarticles:oai:doaj.org/article:80d6fb012f7245d89d50715a6c9fcdec 2023-05-15T13:25:20+02:00 Influence of tides and gravity waves on layering processes in the polar summer mesopause region P. Hoffmann M. Rapp J. Fiedler R. Latteck 2008-12-01T00:00:00Z https://doi.org/10.5194/angeo-26-4013-2008 https://doaj.org/article/80d6fb012f7245d89d50715a6c9fcdec EN eng Copernicus Publications https://www.ann-geophys.net/26/4013/2008/angeo-26-4013-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-4013-2008 0992-7689 1432-0576 https://doaj.org/article/80d6fb012f7245d89d50715a6c9fcdec Annales Geophysicae, Vol 26, Pp 4013-4022 (2008) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2008 ftdoajarticles https://doi.org/10.5194/angeo-26-4013-2008 2022-12-30T21:35:58Z 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 Directory of Open Access Journals: DOAJ Articles Norway Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Annales Geophysicae 26 12 4013 4022 |
institution |
Open Polar |
collection |
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 P. Hoffmann M. Rapp J. Fiedler R. Latteck Influence of tides and gravity waves on layering processes in the polar summer mesopause region |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
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 |
P. Hoffmann M. Rapp J. Fiedler R. Latteck |
author_facet |
P. Hoffmann M. Rapp J. Fiedler R. Latteck |
author_sort |
P. Hoffmann |
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://doaj.org/article/80d6fb012f7245d89d50715a6c9fcdec |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Norway Alomar |
geographic_facet |
Norway Alomar |
genre |
Andenes |
genre_facet |
Andenes |
op_source |
Annales Geophysicae, Vol 26, Pp 4013-4022 (2008) |
op_relation |
https://www.ann-geophys.net/26/4013/2008/angeo-26-4013-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-4013-2008 0992-7689 1432-0576 https://doaj.org/article/80d6fb012f7245d89d50715a6c9fcdec |
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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1766384778073866240 |