The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys
The extraordinary Antarctic stratospheric warming event of 2002 was characterized by a remarkable vertical structure, with the vortex observed to divide at upper levels in the stratosphere but not at lower levels: such ‘partially ’ split vortex events are relatively rare. A simple, yet fully three-d...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.516.1043 2023-05-15T13:51:30+02:00 The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys J. G. Esler L. M. Polvani R. K. Scott The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.1043 http://www.atm.damtp.cam.ac.uk/people/jge1000/paps/esler-etal-GRL-2006.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.1043 http://www.atm.damtp.cam.ac.uk/people/jge1000/paps/esler-etal-GRL-2006.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.atm.damtp.cam.ac.uk/people/jge1000/paps/esler-etal-GRL-2006.pdf text 2006 ftciteseerx 2016-01-08T09:52:46Z The extraordinary Antarctic stratospheric warming event of 2002 was characterized by a remarkable vertical structure, with the vortex observed to divide at upper levels in the stratosphere but not at lower levels: such ‘partially ’ split vortex events are relatively rare. A simple, yet fully three-dimensional, model is constructed to investigate the dynam-ics of this unique event. Planetary waves are excited on the model vortex edge by a lower boundary forcing character-ized by two parameters: an amplitude hF and a frequency ωF, measured relative to a stationary frame. For realistic forcing amplitudes, a partial vortex split resembling that observed during the 2002 event is found only within a spe-cific, narrow band of forcing frequencies. Exploiting the relative simplicity of our model, these frequencies are shown to be those causing a ‘self-tuning ’ resonant excitation of the gravest linear mode, during which nonlinear feedback causes an initially off-resonant forcing to approach resonance. 1. Text Antarc* Antarctic Unknown Antarctic The Antarctic |
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ftciteseerx |
language |
English |
description |
The extraordinary Antarctic stratospheric warming event of 2002 was characterized by a remarkable vertical structure, with the vortex observed to divide at upper levels in the stratosphere but not at lower levels: such ‘partially ’ split vortex events are relatively rare. A simple, yet fully three-dimensional, model is constructed to investigate the dynam-ics of this unique event. Planetary waves are excited on the model vortex edge by a lower boundary forcing character-ized by two parameters: an amplitude hF and a frequency ωF, measured relative to a stationary frame. For realistic forcing amplitudes, a partial vortex split resembling that observed during the 2002 event is found only within a spe-cific, narrow band of forcing frequencies. Exploiting the relative simplicity of our model, these frequencies are shown to be those causing a ‘self-tuning ’ resonant excitation of the gravest linear mode, during which nonlinear feedback causes an initially off-resonant forcing to approach resonance. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. G. Esler L. M. Polvani R. K. Scott |
spellingShingle |
J. G. Esler L. M. Polvani R. K. Scott The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys |
author_facet |
J. G. Esler L. M. Polvani R. K. Scott |
author_sort |
J. G. Esler |
title |
The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys |
title_short |
The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys |
title_full |
The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys |
title_fullStr |
The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys |
title_full_unstemmed |
The Antarctic stratospheric sudden warming of 2002: A selftuned resonance?, Geophys |
title_sort |
antarctic stratospheric sudden warming of 2002: a selftuned resonance?, geophys |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.1043 http://www.atm.damtp.cam.ac.uk/people/jge1000/paps/esler-etal-GRL-2006.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://www.atm.damtp.cam.ac.uk/people/jge1000/paps/esler-etal-GRL-2006.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.1043 http://www.atm.damtp.cam.ac.uk/people/jge1000/paps/esler-etal-GRL-2006.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766255369124839424 |