First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy
Mesospheric water vapour has been observed above ALOMAR in northern Norway (69° N 16° E) by our group since 1995 using a 22 GHz ground based microwave spectrometer. A new instrument with higher sensitivity, providing a much better time resolution especially in the upper mesosphere, was installed in...
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Copernicus Publications
2012
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Online Access: | https://doi.org/10.5194/acp-12-3753-2012 https://doaj.org/article/5e61af8f7c8c4b1c8e5f3d4879b77c86 |
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ftdoajarticles:oai:doaj.org/article:5e61af8f7c8c4b1c8e5f3d4879b77c86 2023-05-15T17:43:29+02:00 First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy K. Hallgren P. Hartogh 2012-04-01T00:00:00Z https://doi.org/10.5194/acp-12-3753-2012 https://doaj.org/article/5e61af8f7c8c4b1c8e5f3d4879b77c86 EN eng Copernicus Publications http://www.atmos-chem-phys.net/12/3753/2012/acp-12-3753-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-3753-2012 1680-7316 1680-7324 https://doaj.org/article/5e61af8f7c8c4b1c8e5f3d4879b77c86 Atmospheric Chemistry and Physics, Vol 12, Iss 8, Pp 3753-3759 (2012) Physics QC1-999 Chemistry QD1-999 article 2012 ftdoajarticles https://doi.org/10.5194/acp-12-3753-2012 2022-12-30T22:35:16Z Mesospheric water vapour has been observed above ALOMAR in northern Norway (69° N 16° E) by our group since 1995 using a 22 GHz ground based microwave spectrometer. A new instrument with higher sensitivity, providing a much better time resolution especially in the upper mesosphere, was installed in May 2008. The time resolution is high enough to provide observations of daily variations in the water vapour mixing ratio. We present the first ground based detections of tidal behaviour in the polar middle atmospheric water vapour distribution. Diurnal and semidiurnal variations of water vapour have been observed and due to the long chemical lifetime of water they are assumed to be caused by changing wind patterns which transport water-rich or poor air into the observed region. The detected tidal behaviour does not follow any single other dynamical field but is instead assumed to be a result of the different wind components. Both the diurnal and semidiurnal amplitude and phase components are resolved. The former shows a stable seasonal behaviour consistent with earlier observations of wind fields and model calculations, whereas the latter appears more complex and no regular behaviour has so far been observed. Article in Journal/Newspaper Northern Norway Directory of Open Access Journals: DOAJ Articles Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Norway Atmospheric Chemistry and Physics 12 8 3753 3759 |
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 K. Hallgren P. Hartogh First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Mesospheric water vapour has been observed above ALOMAR in northern Norway (69° N 16° E) by our group since 1995 using a 22 GHz ground based microwave spectrometer. A new instrument with higher sensitivity, providing a much better time resolution especially in the upper mesosphere, was installed in May 2008. The time resolution is high enough to provide observations of daily variations in the water vapour mixing ratio. We present the first ground based detections of tidal behaviour in the polar middle atmospheric water vapour distribution. Diurnal and semidiurnal variations of water vapour have been observed and due to the long chemical lifetime of water they are assumed to be caused by changing wind patterns which transport water-rich or poor air into the observed region. The detected tidal behaviour does not follow any single other dynamical field but is instead assumed to be a result of the different wind components. Both the diurnal and semidiurnal amplitude and phase components are resolved. The former shows a stable seasonal behaviour consistent with earlier observations of wind fields and model calculations, whereas the latter appears more complex and no regular behaviour has so far been observed. |
format |
Article in Journal/Newspaper |
author |
K. Hallgren P. Hartogh |
author_facet |
K. Hallgren P. Hartogh |
author_sort |
K. Hallgren |
title |
First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy |
title_short |
First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy |
title_full |
First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy |
title_fullStr |
First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy |
title_full_unstemmed |
First detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy |
title_sort |
first detection of tidal behaviour in polar mesospheric water vapour by ground based microwave spectroscopy |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-3753-2012 https://doaj.org/article/5e61af8f7c8c4b1c8e5f3d4879b77c86 |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) |
geographic |
Alomar Norway |
geographic_facet |
Alomar Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
Atmospheric Chemistry and Physics, Vol 12, Iss 8, Pp 3753-3759 (2012) |
op_relation |
http://www.atmos-chem-phys.net/12/3753/2012/acp-12-3753-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-3753-2012 1680-7316 1680-7324 https://doaj.org/article/5e61af8f7c8c4b1c8e5f3d4879b77c86 |
op_doi |
https://doi.org/10.5194/acp-12-3753-2012 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
12 |
container_issue |
8 |
container_start_page |
3753 |
op_container_end_page |
3759 |
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1766145578021945344 |