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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ftcopernicus:oai:publications.copernicus.org:angeo36380 2023-05-15T14:53:56+02:00 Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar Heinrich, D. Nesse, H. Blum, U. Acott, P. Williams, B. Hoppe, U.-P. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-26-1057-2008 https://angeo.copernicus.org/articles/26/1057/2008/ eng eng doi:10.5194/angeo-26-1057-2008 https://angeo.copernicus.org/articles/26/1057/2008/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-26-1057-2008 2020-07-20T16:26:54Z 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. Text Arctic Copernicus Publications: E-Journals Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Arctic Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) Norway Annales Geophysicae 26 5 1057 1069 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
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 |
Text |
author |
Heinrich, D. Nesse, H. Blum, U. Acott, P. Williams, B. Hoppe, U.-P. |
spellingShingle |
Heinrich, D. Nesse, H. Blum, U. Acott, P. Williams, B. Hoppe, U.-P. Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar |
author_facet |
Heinrich, D. Nesse, H. Blum, U. Acott, P. Williams, B. Hoppe, U.-P. |
author_sort |
Heinrich, D. |
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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-26-1057-2008 https://angeo.copernicus.org/articles/26/1057/2008/ |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
geographic |
Alomar Arctic Faraday Norway |
geographic_facet |
Alomar Arctic Faraday Norway |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-26-1057-2008 https://angeo.copernicus.org/articles/26/1057/2008/ |
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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1766325633990787072 |