Stratospheric wave-mean flow interaction: Simple modeling

Details Stratospheric wave-mean flow interaction: Simple modeling Stratospheric wave-mean flow interaction: Simple modeling

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jastp..68.1311r&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 68, Issue 12, p. 1311-1320.

Physics

3

Scientific paper

We show that the interaction between planetary waves and the stratospheric zonal mean flow results in bi-modal (direct-reverse flow) or unimodal state depending on wave number of the waves. First we demonstrate this using a simple non-linear dynamic system of the wave-flow interaction, which has two stable equilibrium states and one unstable state (attractors) in its phase space. Then we compare this model dynamics with the stratosphere dynamics using the same dynamical variables and a similar parameter range in the National Centers for Environmental Prediction (NCEP) Reanalysis data. This comparison supports the tendency for the states of planetary wave zonal mean flow in the upper stratosphere to be bi-modal for wave number 2 and unimodal for wave number 1.

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