Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway
We present observations obtained with the Middle Atmosphere Alomar Radar System (MAARSY) to investigate short-period wave-like features using polar mesospheric summer echoes (PMSEs) as a tracer for the neutral dynamics. We conducted a multibeam experiment including 67 different beam directions durin...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-18-6721-2018 https://noa.gwlb.de/receive/cop_mods_00041765 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041385/acp-18-6721-2018.pdf https://acp.copernicus.org/articles/18/6721/2018/acp-18-6721-2018.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00041765 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00041765 2023-05-15T13:25:18+02:00 Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway Stober, Gunter Sommer, Svenja Schult, Carsten Latteck, Ralph Chau, Jorge L. 2018-05 electronic https://doi.org/10.5194/acp-18-6721-2018 https://noa.gwlb.de/receive/cop_mods_00041765 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041385/acp-18-6721-2018.pdf https://acp.copernicus.org/articles/18/6721/2018/acp-18-6721-2018.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-18-6721-2018 https://noa.gwlb.de/receive/cop_mods_00041765 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041385/acp-18-6721-2018.pdf https://acp.copernicus.org/articles/18/6721/2018/acp-18-6721-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/acp-18-6721-2018 2022-02-08T22:41:25Z We present observations obtained with the Middle Atmosphere Alomar Radar System (MAARSY) to investigate short-period wave-like features using polar mesospheric summer echoes (PMSEs) as a tracer for the neutral dynamics. We conducted a multibeam experiment including 67 different beam directions during a 9-day campaign in June 2013. We identified two Kelvin–Helmholtz instability (KHI) events from the signal morphology of PMSE. The MAARSY observations are complemented by collocated meteor radar wind data to determine the mesoscale gravity wave activity and the vertical structure of the wind field above the PMSE. The KHIs occurred in a strong shear flow with Richardson numbers Ri < 0.25. In addition, we observed 15 wave-like events in our MAARSY multibeam observations applying a sophisticated decomposition of the radial velocity measurements using volume velocity processing. We retrieved the horizontal wavelength, intrinsic frequency, propagation direction, and phase speed from the horizontally resolved wind variability for 15 events. These events showed horizontal wavelengths between 20 and 40 km, vertical wavelengths between 5 and 10 km, and rather high intrinsic phase speeds between 45 and 85 m s−1 with intrinsic periods of 5–10 min. Article in Journal/Newspaper Andenes Northern Norway Niedersächsisches Online-Archiv NOA Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Norway Atmospheric Chemistry and Physics 18 9 6721 6732 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Stober, Gunter Sommer, Svenja Schult, Carsten Latteck, Ralph Chau, Jorge L. Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway |
topic_facet |
article Verlagsveröffentlichung |
description |
We present observations obtained with the Middle Atmosphere Alomar Radar System (MAARSY) to investigate short-period wave-like features using polar mesospheric summer echoes (PMSEs) as a tracer for the neutral dynamics. We conducted a multibeam experiment including 67 different beam directions during a 9-day campaign in June 2013. We identified two Kelvin–Helmholtz instability (KHI) events from the signal morphology of PMSE. The MAARSY observations are complemented by collocated meteor radar wind data to determine the mesoscale gravity wave activity and the vertical structure of the wind field above the PMSE. The KHIs occurred in a strong shear flow with Richardson numbers Ri < 0.25. In addition, we observed 15 wave-like events in our MAARSY multibeam observations applying a sophisticated decomposition of the radial velocity measurements using volume velocity processing. We retrieved the horizontal wavelength, intrinsic frequency, propagation direction, and phase speed from the horizontally resolved wind variability for 15 events. These events showed horizontal wavelengths between 20 and 40 km, vertical wavelengths between 5 and 10 km, and rather high intrinsic phase speeds between 45 and 85 m s−1 with intrinsic periods of 5–10 min. |
format |
Article in Journal/Newspaper |
author |
Stober, Gunter Sommer, Svenja Schult, Carsten Latteck, Ralph Chau, Jorge L. |
author_facet |
Stober, Gunter Sommer, Svenja Schult, Carsten Latteck, Ralph Chau, Jorge L. |
author_sort |
Stober, Gunter |
title |
Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway |
title_short |
Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway |
title_full |
Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway |
title_fullStr |
Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway |
title_full_unstemmed |
Observation of Kelvin–Helmholtz instabilities and gravity waves in the summer mesopause above Andenes in Northern Norway |
title_sort |
observation of kelvin–helmholtz instabilities and gravity waves in the summer mesopause above andenes in northern norway |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-6721-2018 https://noa.gwlb.de/receive/cop_mods_00041765 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041385/acp-18-6721-2018.pdf https://acp.copernicus.org/articles/18/6721/2018/acp-18-6721-2018.pdf |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Alomar Norway |
geographic_facet |
Alomar Norway |
genre |
Andenes Northern Norway |
genre_facet |
Andenes Northern Norway |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-18-6721-2018 https://noa.gwlb.de/receive/cop_mods_00041765 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041385/acp-18-6721-2018.pdf https://acp.copernicus.org/articles/18/6721/2018/acp-18-6721-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-18-6721-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
9 |
container_start_page |
6721 |
op_container_end_page |
6732 |
_version_ |
1766384631921246208 |