Dynamic Features and Maintenance Mechanism of Asian Summer Monsoon Subsystem

In the context of the dissociation of vertical shear flow and tropospheric mean flow based on 1980-1996 NCEP / NCAR re-analysis, study is undertaken of the barotropic and baroclinic de-velopment characteristics and kinetic energy maintenance mechanisms of Asian summer monsoon. Evidence suggests that the monsoon activity is marked by noticeable baroclinicity in three active regions of different dynamical characteristics, located in India, East Asian tropics and subtropics, respectively, with greatly differing maintenance mechanisms of barotropic / baroclinic kinetic en-ergy.