Physical process for maintenance of mean meridional and zonal circulation of atmosphere in middle latitudes, volume 2

The meridional eddy transfer of sensible heat is closely related to the transfer of the momentum in the large scale quasi-geostrophic motion. The large scale eddy transfers can be combined and then dissolved into two groups: a balanced transfer and an unbalanced transfer. The balanced transfer always causes the same value for the variations of the vertical shear of the mean zonal wind and the thermal wind in the temperature field. However, the unbalanced one always causes values with the same absolute magnitude, but with opposite signs for those variations. It is argued that the unbalanced transfer, with which the transfer of the meridional circulation must be associated, plays a very important role in the maintenance of the mean zonal circulation and the zone of the subtropical anticyclones in the winter in the Northern Hemisphere. The kinetic energy of the atmospheric motion is dissolved into a barotropic kinetic energy and a baroclinic kinetic energy, and the conversion processes of the energy are further discussed in detail.