ESS200A
Prof. Jin-Yi Yu
Why Sudden Warming?
q Planetary-scale waves
propagating from the troposphere (produced by big mountains) into the stratosphere.
q Those waves interact with the
polar vortex to break down the polar vortex.
q There are no big mountains in
the Southern Hemisphere to produce planetary-scale waves.
q Less (?) sudden warming in the
southern polar vortex.