Abstract: The TKE (Turbulent Kinetic Energy) closure scheme with 1(1)/(2) order precision and the method of reducing vertical layers are used to decrease computing amount. Modelling results agree well with observations. Compared with results of 3 order closure schemes, there is no obvious reduction of precision. This scheme provides the possibility of inducting and improving the precision of PBL parameterization in three dimensional atmospheric models.

Key words: PBL(Planetary Boundary Layer), TKE(Turbulent Kinetic Enery), comparative research