用南方涛动指数(SOI)的第一主成分表示年涛动强度。

The first principal component of the Southern Oscillation Index (SOI) is used as the intensity of annual SO.

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南方涛动指数（SOI）的波动在过去两个星期仍然为高正值。

The Southern Oscillation Index (SOI) has fluctuated over the past two weeks, but remains strongly positive.

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结果表明，南方涛动指数异常偏负(弱)以及厄尔尼诺事件的滞后影响对湘潭汛期洪涝的短期气候预报有很好的指示性。

The results showed that, anomalously small (weak) SOI and the lag effect of El Nino are good indications to the short-term climate prediction of Xiangtan flooding in flood period.

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