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The Arctic Oscillation (AO), though basically is a zonal symmetric phenomenon, also shows zonal asymmetric variation. The dynamics of this zonal variation is considered here from the point of view of the planetary propagation on the earth sphere. Based on the linear barotropic vorticity equation, the planetary wave ray path is calculated in the winter January. It shows that NAO(North Atlantic Oscillation), AO and North Pacific could be linked through the planetary wave propagation, which acts as the atmospheric bridge. The zonal symmetric and asymmetric structures both have association with these Rossby wave activities.
The dynamics of this zonal variation is considered from the point of view of the planetary propagation on the earth sphere. Based on the linear barotropic vorticity equation, the planetary wave ray path is calculated in the winter January. It shows that NAO (North Atlantic Oscillation), AO and North Pacific could be linked through the planetary wave propagation, which acts as the atmospheric bridge. The zonal symmetric and asymmetric structures both have association with these Rossby wave activities.