Rocket measurements of positive ions during polar mesosphere winter echo conditions
On 18 January 2005, two small, instrumented rockets were launched from Andøya Rocket Range (69.3° N, 16° E) during conditions with Polar Mesosphere Winter Echoes (PMWE). Each of the rockets was equipped with a Positive Ion Probe (PIP) and a Faraday rotation/differential absorption experiment, and wa...
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ftdoajarticles:oai:doaj.org/article:b1c9d7a8d28f4c6f84947059401c609f 2023-05-15T13:25:41+02:00 Rocket measurements of positive ions during polar mesosphere winter echo conditions A. Brattli T. A. Blix Ø. Lie-Svendsen U.-P. Hoppe F.-J. Lübken M. Rapp W. Singer R. Latteck M. Friedrich 2006-01-01T00:00:00Z https://doaj.org/article/b1c9d7a8d28f4c6f84947059401c609f EN eng Copernicus Publications http://www.atmos-chem-phys.net/6/5515/2006/acp-6-5515-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/b1c9d7a8d28f4c6f84947059401c609f Atmospheric Chemistry and Physics, Vol 6, Iss 12, Pp 5515-5524 (2006) Physics QC1-999 Chemistry QD1-999 article 2006 ftdoajarticles 2022-12-30T22:23:49Z On 18 January 2005, two small, instrumented rockets were launched from Andøya Rocket Range (69.3° N, 16° E) during conditions with Polar Mesosphere Winter Echoes (PMWE). Each of the rockets was equipped with a Positive Ion Probe (PIP) and a Faraday rotation/differential absorption experiment, and was launched as part of a salvo of meteorological rockets measuring temperature and wind using falling spheres and chaff. Layers of PMWE were detected between 55 and 77 km by the 53.5 MHz ALWIN radar. The rockets were launched during a solar proton event, and measured extremely high ion densities, of order 10 10 m −3 , in the region where PMWE were observed. The density measurements were analyzed with the wavelet transform technique. At large length scales, ~10 3 m, the power spectral density can be fitted with a k −3 wave number dependence, consistent with saturated gravity waves. Outside the PMWE layers the k −3 spectrum extends down to approximately 10 2 m where the fluctuations are quickly damped and disappear into the instrumental noise. Inside the PMWE layers the spectrum at smaller length scales is well fitted with a k −5/3 dependence over two decades of scales. The PMWE are therefore clearly indicative of turbulence, and the data are consistent with the turbulent dissipation of breaking gravity waves. We estimate a lower limit for the turbulent energy dissipation rate of about 10 −2 W/kg in the upper (72 km) layer. Article in Journal/Newspaper Andøya Directory of Open Access Journals: DOAJ Articles Andøya ENVELOPE(13.982,13.982,68.185,68.185) Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 A. Brattli T. A. Blix Ø. Lie-Svendsen U.-P. Hoppe F.-J. Lübken M. Rapp W. Singer R. Latteck M. Friedrich Rocket measurements of positive ions during polar mesosphere winter echo conditions |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
On 18 January 2005, two small, instrumented rockets were launched from Andøya Rocket Range (69.3° N, 16° E) during conditions with Polar Mesosphere Winter Echoes (PMWE). Each of the rockets was equipped with a Positive Ion Probe (PIP) and a Faraday rotation/differential absorption experiment, and was launched as part of a salvo of meteorological rockets measuring temperature and wind using falling spheres and chaff. Layers of PMWE were detected between 55 and 77 km by the 53.5 MHz ALWIN radar. The rockets were launched during a solar proton event, and measured extremely high ion densities, of order 10 10 m −3 , in the region where PMWE were observed. The density measurements were analyzed with the wavelet transform technique. At large length scales, ~10 3 m, the power spectral density can be fitted with a k −3 wave number dependence, consistent with saturated gravity waves. Outside the PMWE layers the k −3 spectrum extends down to approximately 10 2 m where the fluctuations are quickly damped and disappear into the instrumental noise. Inside the PMWE layers the spectrum at smaller length scales is well fitted with a k −5/3 dependence over two decades of scales. The PMWE are therefore clearly indicative of turbulence, and the data are consistent with the turbulent dissipation of breaking gravity waves. We estimate a lower limit for the turbulent energy dissipation rate of about 10 −2 W/kg in the upper (72 km) layer. |
format |
Article in Journal/Newspaper |
author |
A. Brattli T. A. Blix Ø. Lie-Svendsen U.-P. Hoppe F.-J. Lübken M. Rapp W. Singer R. Latteck M. Friedrich |
author_facet |
A. Brattli T. A. Blix Ø. Lie-Svendsen U.-P. Hoppe F.-J. Lübken M. Rapp W. Singer R. Latteck M. Friedrich |
author_sort |
A. Brattli |
title |
Rocket measurements of positive ions during polar mesosphere winter echo conditions |
title_short |
Rocket measurements of positive ions during polar mesosphere winter echo conditions |
title_full |
Rocket measurements of positive ions during polar mesosphere winter echo conditions |
title_fullStr |
Rocket measurements of positive ions during polar mesosphere winter echo conditions |
title_full_unstemmed |
Rocket measurements of positive ions during polar mesosphere winter echo conditions |
title_sort |
rocket measurements of positive ions during polar mesosphere winter echo conditions |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doaj.org/article/b1c9d7a8d28f4c6f84947059401c609f |
long_lat |
ENVELOPE(13.982,13.982,68.185,68.185) ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
geographic |
Andøya Faraday |
geographic_facet |
Andøya Faraday |
genre |
Andøya |
genre_facet |
Andøya |
op_source |
Atmospheric Chemistry and Physics, Vol 6, Iss 12, Pp 5515-5524 (2006) |
op_relation |
http://www.atmos-chem-phys.net/6/5515/2006/acp-6-5515-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/b1c9d7a8d28f4c6f84947059401c609f |
_version_ |
1766387238031065088 |