Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies?
The authors test the hypothesis that recent observed trends in surface westerlies in the Southern Hemisphere are directly consequent on observed trends in the timing of stratospheric final warming events. The analysis begins by verifying that final warming events have an impact on tropospheric circu...
Published in: | Journal of the Atmospheric Sciences |
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Language: | English |
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AMS (American Meteorological Society)
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Online Access: | https://oceanrep.geomar.de/id/eprint/28908/ https://oceanrep.geomar.de/id/eprint/28908/1/jas-d-12-0343.1.pdf https://doi.org/10.1175/JAS-D-12-0343.1 |
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ftoceanrep:oai:oceanrep.geomar.de:28908 2023-05-15T13:52:14+02:00 Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies? Sheshadri, Aditi Plumb, R. Alan Domeisen, Daniela I.V. 2014 text https://oceanrep.geomar.de/id/eprint/28908/ https://oceanrep.geomar.de/id/eprint/28908/1/jas-d-12-0343.1.pdf https://doi.org/10.1175/JAS-D-12-0343.1 en eng AMS (American Meteorological Society) https://oceanrep.geomar.de/id/eprint/28908/1/jas-d-12-0343.1.pdf Sheshadri, A., Plumb, R. A. and Domeisen, D. I. V. (2014) Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies?. Journal of the Atmospheric Sciences, 71 (2). pp. 566-573. DOI 10.1175/JAS-D-12-0343.1 <https://doi.org/10.1175/JAS-D-12-0343.1>. doi:10.1175/JAS-D-12-0343.1 cc_by_3.0 info:eu-repo/semantics/closedAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1175/JAS-D-12-0343.1 2023-04-07T15:19:34Z The authors test the hypothesis that recent observed trends in surface westerlies in the Southern Hemisphere are directly consequent on observed trends in the timing of stratospheric final warming events. The analysis begins by verifying that final warming events have an impact on tropospheric circulation in a simplified GCM driven by specified equilibrium temperature distributions. Seasonal variations are imposed in the stratosphere only. The model produces qualitatively realistic final warming events whose influence extends down to the surface, much like what has been reported in observational analyses. The authors then go on to study observed trends in surface westerlies composited with respect to the date of final warming events. If the considered hypothesis were correct, these trends would appear to be much weaker when composited with respect to the date of the final warming events. The authors find that this is not the case, and accordingly they conclude that the observed surface changes cannot be attributed simply to this shift toward later final warming events. Article in Journal/Newspaper Antarc* Antarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Journal of the Atmospheric Sciences 71 2 566 573 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The authors test the hypothesis that recent observed trends in surface westerlies in the Southern Hemisphere are directly consequent on observed trends in the timing of stratospheric final warming events. The analysis begins by verifying that final warming events have an impact on tropospheric circulation in a simplified GCM driven by specified equilibrium temperature distributions. Seasonal variations are imposed in the stratosphere only. The model produces qualitatively realistic final warming events whose influence extends down to the surface, much like what has been reported in observational analyses. The authors then go on to study observed trends in surface westerlies composited with respect to the date of final warming events. If the considered hypothesis were correct, these trends would appear to be much weaker when composited with respect to the date of the final warming events. The authors find that this is not the case, and accordingly they conclude that the observed surface changes cannot be attributed simply to this shift toward later final warming events. |
format |
Article in Journal/Newspaper |
author |
Sheshadri, Aditi Plumb, R. Alan Domeisen, Daniela I.V. |
spellingShingle |
Sheshadri, Aditi Plumb, R. Alan Domeisen, Daniela I.V. Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies? |
author_facet |
Sheshadri, Aditi Plumb, R. Alan Domeisen, Daniela I.V. |
author_sort |
Sheshadri, Aditi |
title |
Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies? |
title_short |
Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies? |
title_full |
Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies? |
title_fullStr |
Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies? |
title_full_unstemmed |
Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies? |
title_sort |
can the delay in antarctic polar vortex breakup explain recent trends in surface westerlies? |
publisher |
AMS (American Meteorological Society) |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/28908/ https://oceanrep.geomar.de/id/eprint/28908/1/jas-d-12-0343.1.pdf https://doi.org/10.1175/JAS-D-12-0343.1 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/28908/1/jas-d-12-0343.1.pdf Sheshadri, A., Plumb, R. A. and Domeisen, D. I. V. (2014) Can the Delay in Antarctic Polar Vortex Breakup Explain Recent Trends in Surface Westerlies?. Journal of the Atmospheric Sciences, 71 (2). pp. 566-573. DOI 10.1175/JAS-D-12-0343.1 <https://doi.org/10.1175/JAS-D-12-0343.1>. doi:10.1175/JAS-D-12-0343.1 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1175/JAS-D-12-0343.1 |
container_title |
Journal of the Atmospheric Sciences |
container_volume |
71 |
container_issue |
2 |
container_start_page |
566 |
op_container_end_page |
573 |
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1766256518779371520 |