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美国太空总署(NASA)周一发表研究指出，南极洲海冰面积自2014年以来急剧缩减，过去4年已追上北冰洋过去34年内失去的海冰面积。

研究显示，南极洲海冰面积在过去40年一直持续增长，更在2014年达最高纪录的1280万平方公里，但之后急剧下降至前年达到最低值，失去近200万平方公里海冰，使科学家们感到困惑。

负责研究的女科学家帕金森表示，海冰对地球气候极其重要，其表面能将50%至70%太阳光反射回太空。一旦融化，海水表层将吸收90%太阳光，导致全球暖化将会愈趋严重，而且会影响极地的生态系统，包括企鹅、鲸鱼等海洋动物和植物。

英国利兹大学极地观察和模型中心负责人舒柏特指出，过去数十年南极洲海冰持续增长令人欣慰，因其平衡北冰洋海冰缩减的情况，但现时两个极地的海冰都在缩减，即更少的太阳光被反射回太空中，呼吁人们需要更加关注全球暖化的问题。