Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event
We present kinetic temperatures at ~87 km and ~94 km altitudes inferred from OH (6,2) and O2 At(0,1) airglow observations, respectively, at South Pole (90° S), Antarctica in the austral winter of 2002. These OH and O2 rotational temperatures measurements show mesosphere and lower thermosphere (MLT)...
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2010
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00029354 2023-05-15T13:36:44+02:00 Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event Azeem, S. M. I. Talaat, E. R. Sivjee, G. G. Yee, J.-H. 2010-01 electronic https://doi.org/10.5194/angeo-28-267-2010 https://noa.gwlb.de/receive/cop_mods_00029354 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029309/angeo-28-267-2010.pdf https://angeo.copernicus.org/articles/28/267/2010/angeo-28-267-2010.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-28-267-2010 https://noa.gwlb.de/receive/cop_mods_00029354 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029309/angeo-28-267-2010.pdf https://angeo.copernicus.org/articles/28/267/2010/angeo-28-267-2010.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2010 ftnonlinearchiv https://doi.org/10.5194/angeo-28-267-2010 2022-02-08T22:47:46Z We present kinetic temperatures at ~87 km and ~94 km altitudes inferred from OH (6,2) and O2 At(0,1) airglow observations, respectively, at South Pole (90° S), Antarctica in the austral winter of 2002. These OH and O2 rotational temperatures measurements show mesosphere and lower thermosphere (MLT) temperature anomalies prior to the 2002 Southern Hemisphere Sudden Stratospheric Warming (SSW) . In this paper we focus on the first of the three minor stratospheric warmings which preceded the major SSW event. Temperature anomalies observed in the MLT region show sudden cooling (ΔT=~30 K) in OH temperatures accompanied by warming (ΔT=~15 K) in O2 temperatures preceding the onset of SSW event by about three to four weeks. This shallow vertical extent of mesospheric cooling is in agreement with the numerical simulation of Coy et al. (2005), however, the model cooling was centered well below the mesopause level. The other observed feature of the South Pole MLT temperature dataset is the intensification of planetary wave activity prior to the onset of SSW event. Fourier analyses of both OH and O2 temperatures show amplification of planetary wave activity in the 5–10 day range prior to the onset of SSW. The timing of wave amplification seen in the wave spectra coincides with the peak in OH and O2 temperature anomalies. Article in Journal/Newspaper Antarc* Antarctic Antarctica South pole South pole Niedersächsisches Online-Archiv NOA Antarctic Austral South Pole Annales Geophysicae 28 1 267 276 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Azeem, S. M. I. Talaat, E. R. Sivjee, G. G. Yee, J.-H. Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event |
topic_facet |
article Verlagsveröffentlichung |
description |
We present kinetic temperatures at ~87 km and ~94 km altitudes inferred from OH (6,2) and O2 At(0,1) airglow observations, respectively, at South Pole (90° S), Antarctica in the austral winter of 2002. These OH and O2 rotational temperatures measurements show mesosphere and lower thermosphere (MLT) temperature anomalies prior to the 2002 Southern Hemisphere Sudden Stratospheric Warming (SSW) . In this paper we focus on the first of the three minor stratospheric warmings which preceded the major SSW event. Temperature anomalies observed in the MLT region show sudden cooling (ΔT=~30 K) in OH temperatures accompanied by warming (ΔT=~15 K) in O2 temperatures preceding the onset of SSW event by about three to four weeks. This shallow vertical extent of mesospheric cooling is in agreement with the numerical simulation of Coy et al. (2005), however, the model cooling was centered well below the mesopause level. The other observed feature of the South Pole MLT temperature dataset is the intensification of planetary wave activity prior to the onset of SSW event. Fourier analyses of both OH and O2 temperatures show amplification of planetary wave activity in the 5–10 day range prior to the onset of SSW. The timing of wave amplification seen in the wave spectra coincides with the peak in OH and O2 temperature anomalies. |
format |
Article in Journal/Newspaper |
author |
Azeem, S. M. I. Talaat, E. R. Sivjee, G. G. Yee, J.-H. |
author_facet |
Azeem, S. M. I. Talaat, E. R. Sivjee, G. G. Yee, J.-H. |
author_sort |
Azeem, S. M. I. |
title |
Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event |
title_short |
Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event |
title_full |
Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event |
title_fullStr |
Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event |
title_full_unstemmed |
Mesosphere and lower thermosphere temperature anomalies during the 2002 Antarctic stratospheric warming event |
title_sort |
mesosphere and lower thermosphere temperature anomalies during the 2002 antarctic stratospheric warming event |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/angeo-28-267-2010 https://noa.gwlb.de/receive/cop_mods_00029354 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029309/angeo-28-267-2010.pdf https://angeo.copernicus.org/articles/28/267/2010/angeo-28-267-2010.pdf |
geographic |
Antarctic Austral South Pole |
geographic_facet |
Antarctic Austral South Pole |
genre |
Antarc* Antarctic Antarctica South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica South pole South pole |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-28-267-2010 https://noa.gwlb.de/receive/cop_mods_00029354 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029309/angeo-28-267-2010.pdf https://angeo.copernicus.org/articles/28/267/2010/angeo-28-267-2010.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-28-267-2010 |
container_title |
Annales Geophysicae |
container_volume |
28 |
container_issue |
1 |
container_start_page |
267 |
op_container_end_page |
276 |
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1766083099347648512 |