It is often followed by a return swing of the pendulum with La Nina, which is characterised by unusually cool ocean surface temperatures in the central and eastern tropical Pacific.
Scientists, who closely monitor the two climate patterns, say that while they are not caused by climate change, rising ocean temperatures caused by global warming may affect their intensity and frequency.
"El Nino has an important warming effect on global average temperatures," Jarraud cautioned, stressing that combined with human-induced warming from greenhouse gases such events had "the potential to cause a dramatic rise in global mean temperature".
据《每日电讯报》4月15日报道,联合国气象机构周二警告说,今年太平洋很有可能出现厄尔尼诺现象,给世界其他地区带来干旱和暴雨天气。
世界气象组织(WMO )表示,该组织所建模型显示2017年第二季度末之前极有可能出现厄尔尼诺现象。
“厄尔尼诺现象一旦出现……它会影响气温和降水,并会促成世界不同地区的干旱或大雨,”世界气象组织秘书长米歇尔·雅罗在一份声明中说。
每两到七年,当环绕太平洋热带水域的盛行信风减弱时,就会出现厄尔尼诺现象。
本周二世界气象组织指出,2月份以来,信风减弱了,而且太平洋中部水域表面下水温变暖显著。
声明称,“虽然也不能保证这种情况会导致厄尔尼诺现象,但是信风减弱时间越长,表面下水温比常年变暖越显著,出现厄尔尼诺现象的可能性就越高”。
【世界气象组织:今年可能出现厄尔尼诺现象】相关文章:
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