summer rainfall in north china 华北夏季降水
summer rainfall in east China 中国东部夏季降水
In the paper, the relationship between the summer rainfall in China and the intensity of the northern Pacific oscillation (NPO) in winter is analysed.
本文分析了冬季北太平洋涛动与我国夏季降水的关系。
The summer rainfall in China is influenced directly by the abnormal vertical motion, which is related closely to the abnormal heat sources in the atmosphere.
大气热源的异常是通过直接影响垂直运动场的异常，进而影响到我国的夏季降水的异常。
Therefore, the influence of AAO on summer rainfall in China is related to the decadal background. After 1976, the influence of AAO tended to intensify and extended more northward.
这说明AAO对中国夏季降水的影响与年代际背景有关，1976年之后，AAO对中国夏季降水的影响增强，影响范围更加偏北。
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