With a review of their meteorological background and possible causes, this paper points out that the specific disposition of three different synoptic systems of tropical, subtropical and westerly belts causes the meeting of the air current of warm-wet and cold-dry in this area, and this kind of disPOsition of the synoptic systems is closely related to the specific super.

The progress in the dynamical study of the formation and variation of the subtropical anticyclone during the past decade is reviewed.

This study investigates the influences of the minus-SSTA over the northern Pacific Ocean in the mid-latitudes in Summer of 1993 on the subtropical anticyclone by using the T42L9 global circulation spectral model developed by the IAP/CAS.

Comparison and analysis of the cold high approaching to sea and subtropical high;

Characteristic timescales and temporal-spatial changes of the subtropical high over the northern pacific in summer;

Based on the balance and complement each other for kinetic energy between subtropical westerly jet in winter and west pacific subtropical high in summer, this paper has demonstrated that the predictability of summer climate is more than 80% or the correct climate forecast for summer will be 8～9 years in every ten years.

Connection between the short period evolution structure and vertical motion of the subtropical high pressure in July 1998;

Analyzing 14 ENSO incidents occurring during the period of 47 years, we have reached a conclusion that abnormal warming up of water in the east Pacific Ocean near the equator corresponds with that the subtropical high pressure of the west Pacific Oceauis continuously at high side and its location is at south side in the early summer.