Physics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3312804e&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 12, CiteID L12804
Physics
7
Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342), Atmospheric Processes: Planetary Meteorology (5445, 5739), Atmospheric Processes: Stratosphere/Troposphere Interactions
Scientific paper
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 dynamics of this unique event. Planetary waves are excited on the model vortex edge by a lower boundary forcing characterized 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 specific, 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.
Esler Gavin J.
Polvani Lorenzo M.
Scott Richard K.
No associations
LandOfFree
The Antarctic stratospheric sudden warming of 2002: A self-tuned resonance? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Antarctic stratospheric sudden warming of 2002: A self-tuned resonance?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Antarctic stratospheric sudden warming of 2002: A self-tuned resonance? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1060887