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厄尔尼诺现象是指赤道东太平洋海水温度大范围、长时间、不间断地异常增温现象,拉尼娜现象是与之相反的海水降温现象,发生周期一般为2~7年,平均周期约3~4年。1980年以来,厄尔尼诺现象发生频率达到每两年1次,每次持续12~18个月。厄尔尼诺现象的频繁发生,
The El Niño phenomenon refers to the phenomenon that the La Niña phenomenon is the opposite phenomenon of seawater cooling with a wide range of seawater temperatures over the equatorial East Pacific over an extended period of time and without interruption. The period of occurrence is generally 2-7 years with an average period of about 3-4 years . Since 1980, El Nio events have occurred at rates of once every two years for 12 to 18 months each. El Niño phenomenon occurs frequently,