Relationship Between Monthly 500hPa Height fields and Precipitation Fields Over China in Summer

Correlation and regression analyses based on the data of the period 1951-1985 are employed for investigating the relationship between monthly 500hPa height fields and precipitation fields over China in summer. The results show that there is a significaat relationship between the two fields. An intense correlation area occurs in the eastern part of China, and another one is in the western part which is about 180 degrees longitude from the former. An area with an intense regression factor, which is diagnosed by the method proposed in this paper, is in the same location with the intense correlation area, but it is smaller. In China, the area where predictability is intensely represented varies with monthly. It is in the Yellow River basin in Junc, and in the Yangtze River basin in July and August. The relationship between the two fields in terms of either correlation or regression implies higher stability.