The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming
The impact of gravity wave drag on the Antarctic sudden stratospheric warming (SSW) in 2002 is examined through a mechanistic middle atmosphere model combined with a variational data assimilation system. Significant differences in the SSW representation are found between a model integration that use...
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American Geophysical Union
2018
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ftunivreading:oai:centaur.reading.ac.uk:78683 2024-06-23T07:47:42+00:00 The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming Scheffler, Guillermo Pulido, Manuel Rodas, Claudio 2018-07-16 text https://centaur.reading.ac.uk/78683/ https://centaur.reading.ac.uk/78683/1/Scheffler_et_al-2018-Geophysical_Research_Letters.pdf en eng American Geophysical Union https://centaur.reading.ac.uk/78683/1/Scheffler_et_al-2018-Geophysical_Research_Letters.pdf Scheffler, G., Pulido, M. <https://centaur.reading.ac.uk/view/creators/90008383.html> and Rodas, C. (2018) The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming. Geophysical Research Letters, 45 (13). pp. 6719-6725. ISSN 0094-8276 doi: https://doi.org/10.1029/2018gl077993 <https://doi.org/10.1029/2018gl077993> Article PeerReviewed 2018 ftunivreading https://doi.org/10.1029/2018gl077993 2024-06-11T15:08:23Z The impact of gravity wave drag on the Antarctic sudden stratospheric warming (SSW) in 2002 is examined through a mechanistic middle atmosphere model combined with a variational data assimilation system. Significant differences in the SSW representation are found between a model integration that uses reference gravity wave parameters and one that uses parameters estimated using data assimilation. Upon identical wave forcings at 100 hPa, the vortex breakdown may arise as either a vortex splitting event or a displacement vortex event depending on gravity wave parameters. A local enhancement of Rossby waves is found in the integration with estimated parameters, leading to a split SSW. The changes in the vortex breakdown are associated with changes in the vortex geometry caused entirely by modifying the gravity wave parameters. Gravity wave drag proved to play an instrumental role in preconditioning the stratosphere near a resonant excitation point that triggers the split SSW. Article in Journal/Newspaper Antarc* Antarctic CentAUR: Central Archive at the University of Reading Antarctic The Antarctic Geophysical Research Letters 45 13 6719 6725 |
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Open Polar |
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CentAUR: Central Archive at the University of Reading |
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ftunivreading |
language |
English |
description |
The impact of gravity wave drag on the Antarctic sudden stratospheric warming (SSW) in 2002 is examined through a mechanistic middle atmosphere model combined with a variational data assimilation system. Significant differences in the SSW representation are found between a model integration that uses reference gravity wave parameters and one that uses parameters estimated using data assimilation. Upon identical wave forcings at 100 hPa, the vortex breakdown may arise as either a vortex splitting event or a displacement vortex event depending on gravity wave parameters. A local enhancement of Rossby waves is found in the integration with estimated parameters, leading to a split SSW. The changes in the vortex breakdown are associated with changes in the vortex geometry caused entirely by modifying the gravity wave parameters. Gravity wave drag proved to play an instrumental role in preconditioning the stratosphere near a resonant excitation point that triggers the split SSW. |
format |
Article in Journal/Newspaper |
author |
Scheffler, Guillermo Pulido, Manuel Rodas, Claudio |
spellingShingle |
Scheffler, Guillermo Pulido, Manuel Rodas, Claudio The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming |
author_facet |
Scheffler, Guillermo Pulido, Manuel Rodas, Claudio |
author_sort |
Scheffler, Guillermo |
title |
The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming |
title_short |
The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming |
title_full |
The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming |
title_fullStr |
The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming |
title_full_unstemmed |
The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming |
title_sort |
role of gravity wave drag optimization in the splitting of the antarctic vortex in the 2002 sudden stratospheric warming |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://centaur.reading.ac.uk/78683/ https://centaur.reading.ac.uk/78683/1/Scheffler_et_al-2018-Geophysical_Research_Letters.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://centaur.reading.ac.uk/78683/1/Scheffler_et_al-2018-Geophysical_Research_Letters.pdf Scheffler, G., Pulido, M. <https://centaur.reading.ac.uk/view/creators/90008383.html> and Rodas, C. (2018) The role of gravity wave drag optimization in the splitting of the Antarctic vortex in the 2002 sudden stratospheric warming. Geophysical Research Letters, 45 (13). pp. 6719-6725. ISSN 0094-8276 doi: https://doi.org/10.1029/2018gl077993 <https://doi.org/10.1029/2018gl077993> |
op_doi |
https://doi.org/10.1029/2018gl077993 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
13 |
container_start_page |
6719 |
op_container_end_page |
6725 |
_version_ |
1802651858691424256 |