Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003
During several balloon flights inside the Arctic polar vortex in early 2003, unusual trace gas distributions were observed, which indicate a strong influence of mesospheric air in the stratosphere. The tuneable diode laser (TDL) instrument SPIRALE (Spectroscopie Infra-Rouge par Absorption de Lasers...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00048948 2023-05-15T15:02:08+02:00 Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 Engel, A. Möbius, T. Haase, H.-P. Bönisch, H. Wetter, T. Schmidt, U. Levin, I. Reddmann, T. Oelhaf, H. Wetzel, G. Grunow, K. Huret, N. Pirre, M. 2006-02 electronic https://doi.org/10.5194/acp-6-267-2006 https://noa.gwlb.de/receive/cop_mods_00048948 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048568/acp-6-267-2006.pdf https://acp.copernicus.org/articles/6/267/2006/acp-6-267-2006.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-6-267-2006 https://noa.gwlb.de/receive/cop_mods_00048948 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048568/acp-6-267-2006.pdf https://acp.copernicus.org/articles/6/267/2006/acp-6-267-2006.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2006 ftnonlinearchiv https://doi.org/10.5194/acp-6-267-2006 2022-02-08T22:37:44Z During several balloon flights inside the Arctic polar vortex in early 2003, unusual trace gas distributions were observed, which indicate a strong influence of mesospheric air in the stratosphere. The tuneable diode laser (TDL) instrument SPIRALE (Spectroscopie Infra-Rouge par Absorption de Lasers Embarqués) measured unusually high CO values (up to 600 ppb) on 27 January at about 30 km altitude. The cryosampler BONBON sampled air masses with very high molecular Hydrogen, extremely low SF6 and enhanced CO values on 6 March at about 25 km altitude. Finally, the MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) Fourier Transform Infra-Red (FTIR) spectrometer showed NOy values which are significantly higher than NOy* (the NOy derived from a correlation between N2O and NOy under undisturbed conditions), on 21 and 22 March in a layer centred at 22 km altitude. Thus, the mesospheric air seems to have been present in a layer descending from about 30 km in late January to 25 km altitude in early March and about 22 km altitude on 20 March. We present corroborating evidence from a model study using the KASIMA (KArlsruhe SImulation model of the Middle Atmosphere) model that also shows a layer of mesospheric air, which descended into the stratosphere in November and early December 2002, before the minor warming which occurred in late December 2002 lead to a descent of upper stratospheric air, cutting off a layer in which mesospheric air is present. This layer then descended inside the vortex over the course of the winter. The same feature is found in trajectory calculations, based on a large number of trajectories started in the vicinity of the observations on 6 March. Based on the difference between the mean age derived from SF6 (which has an irreversible mesospheric loss) and from CO2 (whose mesospheric loss is much smaller and reversible) we estimate that the fraction of mesospheric air in the layer observed on 6 March, must have been somewhere between 35% and 100%. Article in Journal/Newspaper Arctic Niedersächsisches Online-Archiv NOA Arctic Atmospheric Chemistry and Physics 6 1 267 282 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Engel, A. Möbius, T. Haase, H.-P. Bönisch, H. Wetter, T. Schmidt, U. Levin, I. Reddmann, T. Oelhaf, H. Wetzel, G. Grunow, K. Huret, N. Pirre, M. Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 |
topic_facet |
article Verlagsveröffentlichung |
description |
During several balloon flights inside the Arctic polar vortex in early 2003, unusual trace gas distributions were observed, which indicate a strong influence of mesospheric air in the stratosphere. The tuneable diode laser (TDL) instrument SPIRALE (Spectroscopie Infra-Rouge par Absorption de Lasers Embarqués) measured unusually high CO values (up to 600 ppb) on 27 January at about 30 km altitude. The cryosampler BONBON sampled air masses with very high molecular Hydrogen, extremely low SF6 and enhanced CO values on 6 March at about 25 km altitude. Finally, the MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) Fourier Transform Infra-Red (FTIR) spectrometer showed NOy values which are significantly higher than NOy* (the NOy derived from a correlation between N2O and NOy under undisturbed conditions), on 21 and 22 March in a layer centred at 22 km altitude. Thus, the mesospheric air seems to have been present in a layer descending from about 30 km in late January to 25 km altitude in early March and about 22 km altitude on 20 March. We present corroborating evidence from a model study using the KASIMA (KArlsruhe SImulation model of the Middle Atmosphere) model that also shows a layer of mesospheric air, which descended into the stratosphere in November and early December 2002, before the minor warming which occurred in late December 2002 lead to a descent of upper stratospheric air, cutting off a layer in which mesospheric air is present. This layer then descended inside the vortex over the course of the winter. The same feature is found in trajectory calculations, based on a large number of trajectories started in the vicinity of the observations on 6 March. Based on the difference between the mean age derived from SF6 (which has an irreversible mesospheric loss) and from CO2 (whose mesospheric loss is much smaller and reversible) we estimate that the fraction of mesospheric air in the layer observed on 6 March, must have been somewhere between 35% and 100%. |
format |
Article in Journal/Newspaper |
author |
Engel, A. Möbius, T. Haase, H.-P. Bönisch, H. Wetter, T. Schmidt, U. Levin, I. Reddmann, T. Oelhaf, H. Wetzel, G. Grunow, K. Huret, N. Pirre, M. |
author_facet |
Engel, A. Möbius, T. Haase, H.-P. Bönisch, H. Wetter, T. Schmidt, U. Levin, I. Reddmann, T. Oelhaf, H. Wetzel, G. Grunow, K. Huret, N. Pirre, M. |
author_sort |
Engel, A. |
title |
Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 |
title_short |
Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 |
title_full |
Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 |
title_fullStr |
Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 |
title_full_unstemmed |
Observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 |
title_sort |
observation of mesospheric air inside the arctic stratospheric polar vortex in early 2003 |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doi.org/10.5194/acp-6-267-2006 https://noa.gwlb.de/receive/cop_mods_00048948 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048568/acp-6-267-2006.pdf https://acp.copernicus.org/articles/6/267/2006/acp-6-267-2006.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-6-267-2006 https://noa.gwlb.de/receive/cop_mods_00048948 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048568/acp-6-267-2006.pdf https://acp.copernicus.org/articles/6/267/2006/acp-6-267-2006.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-6-267-2006 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
6 |
container_issue |
1 |
container_start_page |
267 |
op_container_end_page |
282 |
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1766334127628353536 |