据前人统计，厄尔尼诺出现于地球自转速度急剧变慢的第二年。造成这种现象的主因，是地球间歇性不对称膨胀，引起自转速度几年一次的准周期性急剧变慢。在该时期南北半球岩石圈产生强烈的离开赤道的体力，使赤道地区发生东西向张性断裂活动。位于阻力较小的软流层之上的太平洋岩石圈，不仅规模大、动力强，而且存在着东太平洋海隆薄弱带，并与秘鲁海沟应变空间毗邻，故现今太平洋东部赤道地区的东西向张性断裂最为发育，形成规模宏大的卡内基断裂带和加拉帕戈斯断裂带。它们活动促使海底的岩浆和热水喷溢，导致厄尔尼诺的海水升温多从秘鲁－厄尔多尔沿岸开始。地球自转速度变慢过程中，赤道地区的大气和海水获得较多的向东角动量，造成该地区的信风和向西流动洋流减弱、东太平洋冷水上翻涌升流衰缓，加速赤道东太平流海域温度变暖，助长厄尔尼诺的形成。全球大气角动量的季节性变化，也引起地球自转速度冬季慢夏季快的周年项变化，使厄尔尼诺年增温盛期一般出现于年末前后。 According to previous statistics, El Niño appeared in the second year when the Earth’s rotation speed slowed drastically. The main cause of this phenomenon is that the Earth intermittently expands asymmetrically, causing the quasi-periodicity of the rotation speed to slow down dramatically in a few years. During this period, the northern and northern hemispheres have a strong physical force to leave the equator, causing east-west tensile faults in the equatorial regions. The Pacific lithosphere above the less resistive asthenosphere is not only large in size and strong in power, but also has a weak zone of the East Pacific sea-seam and is adjacent to the Peruvian trench strain-space. Therefore, the east-west tension of the equatorial region in the eastern Pacific nowadays The most developed faults are the Carnegie and Galapagos faults. Their activities led to the spurt of magma and hot water on the seabed, resulting in a warming of the El Niño sea from the Peruvian-Erdor coast. In the process of slowing Earth’s rotation, the atmospheric and seawater in the equatorial area gained more momentum in the eastward direction, resulting in a weaker current wind and westward flow in the region, a slowdown in the upwelling of the cold over the eastern Pacific, and an acceleration in the eastern equatorial Pacific The temperature warms in the sea, contributing to the El Niño formation. The seasonal changes in global atmospheric angular momentum also cause the Earth’s rotation speed to change rapidly in winter and summer in summer, so that El Niño annual warming generally occurs before and after the year-end.