Jump Phenomena in the 500 hPa Signal Field and the Occurrence of China''s Heavy Rainfalls
500 hPa高度场的信号场突变与我国暴雨的发生规律性研究

Based on the previous paper entitled " A Study of the 500 hPa Signal Field about Heavy rainfall in China", the statistics is found in the 500 hPa signal field. It is found that there are three areas of significant signal: to west of China, inland of China, and to east of China, seperately. The indices representing the 500 hPa signal field are extracted. They can describe the anomaly phenomena before the occurrence of the heavy rainfall. The accumulated values and moving averages can be presented of the climate signal and be associated with the occurrence of the heavy rainfall occurrence. They are the efficient statistics being used in the heavy rainfalls on the short climate predictions. It shows that the 500 hPa-signal field is also additionally efficient tools in the synoptic diagnostic studies.