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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ftleibnizopen:oai:oai.leibnizopen.de:7Q4yZIcBdbrxVwz6t9cD 2023-05-15T13:25:42+02:00 Rocket measurements of positive ions during polar mesosphere winter echo conditions Brattli, A. Blix, T.A. Lie-Svendsen, Ø. Hoppe, U.-P. Lübken, F.-J. Rapp, M. Singer, W. Latteck, R. Friedrich, M. 2006 application/pdf https://doi.org/10.34657/1245 https://oa.tib.eu/renate/handle/123456789/778 eng eng München : European Geopyhsical Union CC BY-NC-SA 2.5 Unported https://creativecommons.org/licenses/by-nc-sa/2.5/ Atmospheric Chemistry and Physics, Volume 6, Issue 12, Page 5515-5524 absorption echo sounding experimental study gravity wave instrumentation ion ion exchange measurement method polar meteorology winter 550 article Text 2006 ftleibnizopen https://doi.org/10.34657/1245 2023-04-09T23:11:37Z 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 1010 m−3, in the region where PMWE were observed. The density measurements were analyzed with the wavelet transform technique. At large length scales, ~103 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 102 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. publishedVersion Article in Journal/Newspaper Andøya LeibnizOpen (The Leibniz Association) Andøya ENVELOPE(13.982,13.982,68.185,68.185) Faraday ENVELOPE(-64.256,-64.256,-65.246,-65.246) |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
absorption echo sounding experimental study gravity wave instrumentation ion ion exchange measurement method polar meteorology winter 550 |
spellingShingle |
absorption echo sounding experimental study gravity wave instrumentation ion ion exchange measurement method polar meteorology winter 550 Brattli, A. Blix, T.A. Lie-Svendsen, Ø. Hoppe, U.-P. Lübken, F.-J. Rapp, M. Singer, W. Latteck, R. Friedrich, M. Rocket measurements of positive ions during polar mesosphere winter echo conditions |
topic_facet |
absorption echo sounding experimental study gravity wave instrumentation ion ion exchange measurement method polar meteorology winter 550 |
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 1010 m−3, in the region where PMWE were observed. The density measurements were analyzed with the wavelet transform technique. At large length scales, ~103 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 102 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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Brattli, A. Blix, T.A. Lie-Svendsen, Ø. Hoppe, U.-P. Lübken, F.-J. Rapp, M. Singer, W. Latteck, R. Friedrich, M. |
author_facet |
Brattli, A. Blix, T.A. Lie-Svendsen, Ø. Hoppe, U.-P. Lübken, F.-J. Rapp, M. Singer, W. Latteck, R. Friedrich, M. |
author_sort |
Brattli, A. |
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 |
München : European Geopyhsical Union |
publishDate |
2006 |
url |
https://doi.org/10.34657/1245 https://oa.tib.eu/renate/handle/123456789/778 |
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, Volume 6, Issue 12, Page 5515-5524 |
op_rights |
CC BY-NC-SA 2.5 Unported https://creativecommons.org/licenses/by-nc-sa/2.5/ |
op_doi |
https://doi.org/10.34657/1245 |
_version_ |
1766387362696265728 |