Abstract: For the break-up of the polar vortex in the 100 hPa, the main contribution is the upward transfer of the energy of wave number two from the troposphere and the second contribution is the nonlinear interactions between the waves. For the process of the regenesis of the polar vortex, the main contribution is the nonlinear interaction between the waves, and the second contribution is the upward transfer of energy from the troposphere.