NCEP / NCAR reanalysis data from the other observation data from 1970 to 1999 I examined the interannual variability of the MH and AH. Interannual variability of MH indicates the domain, you are strengthening the strength of the high south latitude very low deepens MH in AAO. ENSO, the strength of the AH when the El Niño occurred will be badly. Summer rainfall of the correlation analysis and case studies East Asia shows the MH AH in conjunction with closely. Intensified from MH northern spring to summer, many of the region to Japan from the Yangtze River basin in rainfall contrast, less rainfall in South China and Taiwan and most of the mid-latitude East Asia in the Western Pacific to the east of the region when it finds. As compared with the hydrogen on the rainfall of the summer in East Asia of AH, and will be limited to localized area. There are intensified and South China on many of the rainfall of AH. The results of this study, AAO shows a strong signal in the time scale of variation from year to year, which plays an important role in the rainfall in the summer of East Asia. This finding reveals the interannual variability and the physical mechanism of prediction of summer precipitation in China of the real importance of the East Asian summer monsoon.
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