A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model
The Whole Atmosphere Community Climate Model (WACCM) is used to study the influence of gravity waves on the generation and evolution of an elevated stratopause following a sudden stratospheric warming (SSW). By comparing WACCM simulations of two Arctic winters, where one is dynamically undisturbed a...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2011
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-829 https://doi.org/10.1029/2010GL046566 |
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ftncar:oai:drupal-site.org:articles_11608 2023-09-05T13:17:09+02:00 A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model Chandran, A. (author) Collins, R. (author) Garcia, Rolando (author) Marsh, Daniel (author) 2011-04-20 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-829 https://doi.org/10.1029/2010GL046566 en eng American Geophysical Union Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-829 doi:10.1029/2010GL046566 wos: 000289854500003 ark:/85065/d77p900m Copyright 2011 American Geophysical Union. Stratospheric sudden warming Gravity wave forcing Planetary wave forcing Text article 2011 ftncar https://doi.org/10.1029/2010GL046566 2023-08-14T18:40:16Z The Whole Atmosphere Community Climate Model (WACCM) is used to study the influence of gravity waves on the generation and evolution of an elevated stratopause following a sudden stratospheric warming (SSW). By comparing WACCM simulations of two Arctic winters, where one is dynamically undisturbed and one is disturbed, we find that intense planetary wave activity during a SSW drives the reversal of the zonal mean wind in the stratosphere. This alters the penetration of eastward propagating, non-orographic gravity waves into the mesosphere, which determine the extent of cooling in the lower mesosphere and upper stratosphere through the adiabatic effects of the gravity wave-driven residual circulation, and play a crucial role in the reformation of the elevated stratopause in the lower mesosphere. Eventually, the forcing due to gravity waves returns to normal wintertime values as the stratospheric zonal wind recovers, and is then associated with the warming and lowering of the elevated stratopause, by wave induced diabatic descent. We find that SSW followed by an elevated stratopause is a climatologically robust phenomenon in free running WACCM with characteristics closely resembling recently observed events in the Arctic. Article in Journal/Newspaper Arctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Geophysical Research Letters 38 8 n/a n/a |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Stratospheric sudden warming Gravity wave forcing Planetary wave forcing |
spellingShingle |
Stratospheric sudden warming Gravity wave forcing Planetary wave forcing A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model |
topic_facet |
Stratospheric sudden warming Gravity wave forcing Planetary wave forcing |
description |
The Whole Atmosphere Community Climate Model (WACCM) is used to study the influence of gravity waves on the generation and evolution of an elevated stratopause following a sudden stratospheric warming (SSW). By comparing WACCM simulations of two Arctic winters, where one is dynamically undisturbed and one is disturbed, we find that intense planetary wave activity during a SSW drives the reversal of the zonal mean wind in the stratosphere. This alters the penetration of eastward propagating, non-orographic gravity waves into the mesosphere, which determine the extent of cooling in the lower mesosphere and upper stratosphere through the adiabatic effects of the gravity wave-driven residual circulation, and play a crucial role in the reformation of the elevated stratopause in the lower mesosphere. Eventually, the forcing due to gravity waves returns to normal wintertime values as the stratospheric zonal wind recovers, and is then associated with the warming and lowering of the elevated stratopause, by wave induced diabatic descent. We find that SSW followed by an elevated stratopause is a climatologically robust phenomenon in free running WACCM with characteristics closely resembling recently observed events in the Arctic. |
author2 |
Chandran, A. (author) Collins, R. (author) Garcia, Rolando (author) Marsh, Daniel (author) |
format |
Article in Journal/Newspaper |
title |
A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model |
title_short |
A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model |
title_full |
A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model |
title_fullStr |
A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model |
title_full_unstemmed |
A case study of an elevated stratopause generated in the Whole Atmosphere Community Climate Model |
title_sort |
case study of an elevated stratopause generated in the whole atmosphere community climate model |
publisher |
American Geophysical Union |
publishDate |
2011 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-829 https://doi.org/10.1029/2010GL046566 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-829 doi:10.1029/2010GL046566 wos: 000289854500003 ark:/85065/d77p900m |
op_rights |
Copyright 2011 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2010GL046566 |
container_title |
Geophysical Research Letters |
container_volume |
38 |
container_issue |
8 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1776198435095969792 |