Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations
Zenith-directed Fabry-Perot Spectrometer (FPS) and 3-Field Photometer (3FP) observations of the λ630 nm emission (~240 km altitude) were obtained at Davis station, Antarctica, during the austral winter of 1999. Eleven nights of suitable data were searched for significant periodicities common to vert...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2001
|
Subjects: | |
Online Access: | https://doi.org/10.5194/angeo-19-533-2001 https://noa.gwlb.de/receive/cop_mods_00036449 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036403/angeo-19-533-2001.pdf https://angeo.copernicus.org/articles/19/533/2001/angeo-19-533-2001.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00036449 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00036449 2023-05-15T14:02:33+02:00 Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations Innis, J. L. Greet, P. A. Dyson, P. L. 2001-05 electronic https://doi.org/10.5194/angeo-19-533-2001 https://noa.gwlb.de/receive/cop_mods_00036449 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036403/angeo-19-533-2001.pdf https://angeo.copernicus.org/articles/19/533/2001/angeo-19-533-2001.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-19-533-2001 https://noa.gwlb.de/receive/cop_mods_00036449 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036403/angeo-19-533-2001.pdf https://angeo.copernicus.org/articles/19/533/2001/angeo-19-533-2001.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2001 ftnonlinearchiv https://doi.org/10.5194/angeo-19-533-2001 2022-02-08T22:43:59Z Zenith-directed Fabry-Perot Spectrometer (FPS) and 3-Field Photometer (3FP) observations of the λ630 nm emission (~240 km altitude) were obtained at Davis station, Antarctica, during the austral winter of 1999. Eleven nights of suitable data were searched for significant periodicities common to vertical winds from the FPS and photo-metric variations from the 3FP. Three wave-like events were found, each of around one or more hours in duration, with periods around 15 minutes, vertical velocity amplitudes near 60 ms–1 , horizontal phase velocities around 300 ms–1 , and horizontal wavelengths from 240 to 400 km. These characteristics appear consistent with polar cap gravity waves seen by other workers, and we conclude this is a likely interpretation of our data. Assuming a source height near 125 km altitude, we determine the approximate source location by calculating back along the wave trajectory using the gravity wave property relating angle of ascent and frequency. The wave sources appear to be in the vicinity of the poleward border of the auroral oval, at magnetic local times up to 5 hours before local magnetic midnight. Key words. Meteorology and atmospheric dynamics (thermospheric dynamics; waves and tides) Article in Journal/Newspaper Antarc* Antarctica Niedersächsisches Online-Archiv NOA Austral Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) Annales Geophysicae 19 5 533 543 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Innis, J. L. Greet, P. A. Dyson, P. L. Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations |
topic_facet |
article Verlagsveröffentlichung |
description |
Zenith-directed Fabry-Perot Spectrometer (FPS) and 3-Field Photometer (3FP) observations of the λ630 nm emission (~240 km altitude) were obtained at Davis station, Antarctica, during the austral winter of 1999. Eleven nights of suitable data were searched for significant periodicities common to vertical winds from the FPS and photo-metric variations from the 3FP. Three wave-like events were found, each of around one or more hours in duration, with periods around 15 minutes, vertical velocity amplitudes near 60 ms–1 , horizontal phase velocities around 300 ms–1 , and horizontal wavelengths from 240 to 400 km. These characteristics appear consistent with polar cap gravity waves seen by other workers, and we conclude this is a likely interpretation of our data. Assuming a source height near 125 km altitude, we determine the approximate source location by calculating back along the wave trajectory using the gravity wave property relating angle of ascent and frequency. The wave sources appear to be in the vicinity of the poleward border of the auroral oval, at magnetic local times up to 5 hours before local magnetic midnight. Key words. Meteorology and atmospheric dynamics (thermospheric dynamics; waves and tides) |
format |
Article in Journal/Newspaper |
author |
Innis, J. L. Greet, P. A. Dyson, P. L. |
author_facet |
Innis, J. L. Greet, P. A. Dyson, P. L. |
author_sort |
Innis, J. L. |
title |
Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations |
title_short |
Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations |
title_full |
Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations |
title_fullStr |
Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations |
title_full_unstemmed |
Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations |
title_sort |
evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations |
publisher |
Copernicus Publications |
publishDate |
2001 |
url |
https://doi.org/10.5194/angeo-19-533-2001 https://noa.gwlb.de/receive/cop_mods_00036449 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036403/angeo-19-533-2001.pdf https://angeo.copernicus.org/articles/19/533/2001/angeo-19-533-2001.pdf |
long_lat |
ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) |
geographic |
Austral Davis Station Davis-Station |
geographic_facet |
Austral Davis Station Davis-Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
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-19-533-2001 https://noa.gwlb.de/receive/cop_mods_00036449 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036403/angeo-19-533-2001.pdf https://angeo.copernicus.org/articles/19/533/2001/angeo-19-533-2001.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-19-533-2001 |
container_title |
Annales Geophysicae |
container_volume |
19 |
container_issue |
5 |
container_start_page |
533 |
op_container_end_page |
543 |
_version_ |
1766272876845989888 |