Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar
We present summer Na-densities and atmospheric temperatures measured 80 to 110 km above the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR). The Weber Na Lidar is part of ALOMAR, located at 69° N in Norway, 150 km north of the Arctic Circle. The sun does not set here during the summ...
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ftdoajarticles:oai:doaj.org/article:339ad4092f8c462f85af77f033b28c16 2023-05-15T14:55:04+02:00 Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar D. Heinrich H. Nesse U. Blum P. Acott B. Williams U.-P. Hoppe 2008-05-01T00:00:00Z https://doi.org/10.5194/angeo-26-1057-2008 https://doaj.org/article/339ad4092f8c462f85af77f033b28c16 EN eng Copernicus Publications https://www.ann-geophys.net/26/1057/2008/angeo-26-1057-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-1057-2008 0992-7689 1432-0576 https://doaj.org/article/339ad4092f8c462f85af77f033b28c16 Annales Geophysicae, Vol 26, Pp 1057-1069 (2008) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2008 ftdoajarticles https://doi.org/10.5194/angeo-26-1057-2008 2022-12-30T22:47:52Z We present summer Na-densities and atmospheric temperatures measured 80 to 110 km above the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR). The Weber Na Lidar is part of ALOMAR, located at 69° N in Norway, 150 km north of the Arctic Circle. The sun does not set here during the summer months, and measurements require a narrowband Faraday Anomalous Dispersion Optical Filter (FADOF). We discuss an observed sudden enhancement in the Na number density around 22:00 UT on 1 to 2 June 2006. We compare this observation with previous summer measurements and find a frequent appearance of Na number density enhancements near local midnight. We describe the time of appearance, the altitude distribution, the duration and the strength of these enhancements and compare them to winter observations. We investigate possible formation mechanisms and, as others before, we find a strong link between these Na number density enhancements and sporadic E layers. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Norway Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Annales Geophysicae 26 5 1057 1069 |
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 D. Heinrich H. Nesse U. Blum P. Acott B. Williams U.-P. Hoppe Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We present summer Na-densities and atmospheric temperatures measured 80 to 110 km above the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR). The Weber Na Lidar is part of ALOMAR, located at 69° N in Norway, 150 km north of the Arctic Circle. The sun does not set here during the summer months, and measurements require a narrowband Faraday Anomalous Dispersion Optical Filter (FADOF). We discuss an observed sudden enhancement in the Na number density around 22:00 UT on 1 to 2 June 2006. We compare this observation with previous summer measurements and find a frequent appearance of Na number density enhancements near local midnight. We describe the time of appearance, the altitude distribution, the duration and the strength of these enhancements and compare them to winter observations. We investigate possible formation mechanisms and, as others before, we find a strong link between these Na number density enhancements and sporadic E layers. |
format |
Article in Journal/Newspaper |
author |
D. Heinrich H. Nesse U. Blum P. Acott B. Williams U.-P. Hoppe |
author_facet |
D. Heinrich H. Nesse U. Blum P. Acott B. Williams U.-P. Hoppe |
author_sort |
D. Heinrich |
title |
Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar |
title_short |
Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar |
title_full |
Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar |
title_fullStr |
Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar |
title_full_unstemmed |
Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar |
title_sort |
summer sudden na number density enhancements measured with the alomar weber na lidar |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-1057-2008 https://doaj.org/article/339ad4092f8c462f85af77f033b28c16 |
long_lat |
ENVELOPE(-64.256,-64.256,-65.246,-65.246) ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Arctic Norway Faraday Alomar |
geographic_facet |
Arctic Norway Faraday Alomar |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Annales Geophysicae, Vol 26, Pp 1057-1069 (2008) |
op_relation |
https://www.ann-geophys.net/26/1057/2008/angeo-26-1057-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-1057-2008 0992-7689 1432-0576 https://doaj.org/article/339ad4092f8c462f85af77f033b28c16 |
op_doi |
https://doi.org/10.5194/angeo-26-1057-2008 |
container_title |
Annales Geophysicae |
container_volume |
26 |
container_issue |
5 |
container_start_page |
1057 |
op_container_end_page |
1069 |
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