值得注意的是,年代际振荡信号已在20世纪90年代中达到峰值,近期已开始下降,这有可能影响北半球未来气候增暖的速率。

• It has been noticed that IDO shows its peak value in the middle 1990s, and begins to descend recently, a fact which probably affects on the coming warming rate of Northern Hemisphere mean temperature.