The El Nino phenomenon is an important factor in monitoring global warming, according to a paper by Hansen and colleagues published in the current Proceedings of the National Academy of Sciences.

• 汉森和他的同事在最近一期《国家科学学会学报》上发表的论文中指出，"厄尔尼诺"现象是监测全球变暖的一个重要因素。