NCEP / NCAR and the re-analysis data from other observation data. And variable high aging Mascarene Islands (MH) in 1970-1999, which shows that the domain by fluctuations secular oscillation (AAO) Antarctic of MH when it deepened the lowest circumpolar of south latitude and high strength (AH ) I examined the high Australia. MH has been enhanced in Southern Oscillation (ENSO), the intensity of the AH will Suntory ENSO has intensified occur. Correlation analysis and case studies have shown it. East Asia over the tropical rainfall when the northern spring intensified to more summer is closely related and MH and MH AH. Rainfall over the region of the contrast of the Yangtze River valley to Japan, found the east to southern China and rainfall of more than a little western Pacific Ocean of Taiwan. And, a large region in the latitude in the East Asia. East Asia, compared with the results of AH MH hot rain in the area of local constraints. AAO to aging time, which plays an important role in the summer of rainfall also on the increase rainfall in East Asia on the southern China on the strength of the AH results of this study, I show the strong signal. These findings have a practical significance to clarify the physical mechanism of the interannual variability of the prediction of the summer monsoon and China summer rainfall in East Asia.
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