正偶(单)极强迫源对大气低频振荡的调制作用强于负偶(单)极，波动振荡明显加快。

The frequency modulation effects of positive dipole (unipole) forcing source on LFO is stronger than negative dipole (unipole), and the wave oscillation quicken evidently.

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结果表明：印度洋海温偶极振荡异常，引起了大气环流的异常，影响了季风强度和雨带分布。

Results show that the IOD anomaly results in anomalous atmospheric circulation, which affects the distribution of the rain belt during rainy seasons in China and the East Asian monsoon.

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