Long-term lidar observations of wintertime gravity wave activity over northern Sweden
This paper presents an analysis of gravity wave activity over northern Sweden as deduced from 18 years of wintertime lidar measurements at Esrange (68� N, 21� E). Gravity wave potential energy density (GWPED) was used to characterize the strength of gravity waves in the altitude regions 30–40 km and...
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Online Access: | https://elib.dlr.de/92533/ https://elib.dlr.de/92533/1/Ehard%2014.pdf http://www.ann-geophys.net/32/1395/2014/ |
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ftdlr:oai:elib.dlr.de:92533 2023-07-16T04:00:09+02:00 Long-term lidar observations of wintertime gravity wave activity over northern Sweden Ehard, Benedikt Achtert, Peggy Gumbel, Jörg 2014-11-13 application/pdf https://elib.dlr.de/92533/ https://elib.dlr.de/92533/1/Ehard%2014.pdf http://www.ann-geophys.net/32/1395/2014/ en eng Copernicus Publications https://elib.dlr.de/92533/1/Ehard%2014.pdf Ehard, Benedikt und Achtert, Peggy und Gumbel, Jörg (2014) Long-term lidar observations of wintertime gravity wave activity over northern Sweden. Annales Geophysicae, Seiten 1395-1405. Copernicus Publications. doi:10.5194/angeo-32-1395-2014 <https://doi.org/10.5194/angeo-32-1395-2014>. ISSN 0992-7689. Institut für Physik der Atmosphäre Lidar Zeitschriftenbeitrag PeerReviewed 2014 ftdlr https://doi.org/10.5194/angeo-32-1395-2014 2023-06-27T08:28:08Z This paper presents an analysis of gravity wave activity over northern Sweden as deduced from 18 years of wintertime lidar measurements at Esrange (68� N, 21� E). Gravity wave potential energy density (GWPED) was used to characterize the strength of gravity waves in the altitude regions 30–40 km and 40–50 km. The obtained values exceed previous observations reported in the literature. This is suggested to be due to Esrange’s location downwind of the Scandinavian mountain range and due to differences in the various methods that are currently used to retrieve gravity wave parameters. The analysis method restricted the identification of the dominating vertical wavelengths to a range from 2 to 13 km. No preference was found for any wavelength in this window. Monthly mean values of GWPED show that most of the gravity waves’ energy dissipates well below the stratopause and that higher altitude regions show only small dissipation rates of GWPED. Our analysis does not reproduce the previously reported negative trend in gravity wave activity over Esrange. The observed interannual variability of GWPED is connected to the occurrence of stratospheric warmings with generally lower wintertime mean GWPED during years with major stratospheric warmings.A bimodal GWPED occurrence frequency indicates that gravity wave activity at Esrange is affected by both ubiquitouswave sources and orographic forcing. Article in Journal/Newspaper Northern Sweden German Aerospace Center: elib - DLR electronic library Esrange ENVELOPE(21.117,21.117,67.883,67.883) Annales Geophysicae 32 11 1395 1405 |
institution |
Open Polar |
collection |
German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
English |
topic |
Institut für Physik der Atmosphäre Lidar |
spellingShingle |
Institut für Physik der Atmosphäre Lidar Ehard, Benedikt Achtert, Peggy Gumbel, Jörg Long-term lidar observations of wintertime gravity wave activity over northern Sweden |
topic_facet |
Institut für Physik der Atmosphäre Lidar |
description |
This paper presents an analysis of gravity wave activity over northern Sweden as deduced from 18 years of wintertime lidar measurements at Esrange (68� N, 21� E). Gravity wave potential energy density (GWPED) was used to characterize the strength of gravity waves in the altitude regions 30–40 km and 40–50 km. The obtained values exceed previous observations reported in the literature. This is suggested to be due to Esrange’s location downwind of the Scandinavian mountain range and due to differences in the various methods that are currently used to retrieve gravity wave parameters. The analysis method restricted the identification of the dominating vertical wavelengths to a range from 2 to 13 km. No preference was found for any wavelength in this window. Monthly mean values of GWPED show that most of the gravity waves’ energy dissipates well below the stratopause and that higher altitude regions show only small dissipation rates of GWPED. Our analysis does not reproduce the previously reported negative trend in gravity wave activity over Esrange. The observed interannual variability of GWPED is connected to the occurrence of stratospheric warmings with generally lower wintertime mean GWPED during years with major stratospheric warmings.A bimodal GWPED occurrence frequency indicates that gravity wave activity at Esrange is affected by both ubiquitouswave sources and orographic forcing. |
format |
Article in Journal/Newspaper |
author |
Ehard, Benedikt Achtert, Peggy Gumbel, Jörg |
author_facet |
Ehard, Benedikt Achtert, Peggy Gumbel, Jörg |
author_sort |
Ehard, Benedikt |
title |
Long-term lidar observations of wintertime gravity wave activity over northern Sweden |
title_short |
Long-term lidar observations of wintertime gravity wave activity over northern Sweden |
title_full |
Long-term lidar observations of wintertime gravity wave activity over northern Sweden |
title_fullStr |
Long-term lidar observations of wintertime gravity wave activity over northern Sweden |
title_full_unstemmed |
Long-term lidar observations of wintertime gravity wave activity over northern Sweden |
title_sort |
long-term lidar observations of wintertime gravity wave activity over northern sweden |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://elib.dlr.de/92533/ https://elib.dlr.de/92533/1/Ehard%2014.pdf http://www.ann-geophys.net/32/1395/2014/ |
long_lat |
ENVELOPE(21.117,21.117,67.883,67.883) |
geographic |
Esrange |
geographic_facet |
Esrange |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
https://elib.dlr.de/92533/1/Ehard%2014.pdf Ehard, Benedikt und Achtert, Peggy und Gumbel, Jörg (2014) Long-term lidar observations of wintertime gravity wave activity over northern Sweden. Annales Geophysicae, Seiten 1395-1405. Copernicus Publications. doi:10.5194/angeo-32-1395-2014 <https://doi.org/10.5194/angeo-32-1395-2014>. ISSN 0992-7689. |
op_doi |
https://doi.org/10.5194/angeo-32-1395-2014 |
container_title |
Annales Geophysicae |
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32 |
container_issue |
11 |
container_start_page |
1395 |
op_container_end_page |
1405 |
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1771548695854055424 |