更多冰川融化

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就在去年 12 月,在美国地球物理联合会年会上提出的研究结果表明,与普遍看法相反,由于西南极冰盖(WAIS)变薄而引起的海平面变化可能不会构成任何真正的威胁。然而,这种论断究竟有多可靠仍不清楚。根据今天发表在《科学》杂志上的一份报告,松岛冰川(PIG)——西南极冰盖最大的冰川——正在以惊人的速度萎缩,这将使其在 600 年内漂离西南极洲。

根据 1992 年至 1999 年的卫星数据,伦敦大学学院的安德鲁·谢泼德和他的同事估计,松岛冰川的质量每年减少约 40 亿吨,导致海平面上升 0.01 毫米。尽管这本身相对来说是微不足道的,但它可能为了解西南极冰盖内部更大规模发生的事情提供见解。松岛冰川变薄的原因尚未完全了解,但全球变暖很可能在其中发挥作用。(整个西南极冰盖的融化可能导致海平面上升约五米,淹没沿海地区。)“我们首次监测到了这种变化,”谢泼德告诉路透社。“现在对我们来说重要的是继续对其进行建模。”

Kate Wong is an award-winning science writer and senior editor at 大众科学 focused on evolution, ecology, anthropology, archaeology, paleontology and animal behavior. She is fascinated by human origins, which she has covered for more than 25 years. Recently she has become obsessed with birds. Her reporting has taken her to caves in France and Croatia that Neandertals once called home, to the shores of Kenya's Lake Turkana in search of the oldest stone tools in the world, to Madagascar on an expedition to unearth ancient mammals and dinosaurs, to the icy waters of Antarctica, where humpback whales feast on krill, and on a "Big Day" race around the state of Connecticut to find as many bird species as possible in 24 hours. Kate is co-author, with Donald Johanson, of Lucy's Legacy: The Quest for Human Origins. She holds a bachelor of science degree in biological anthropology and zoology from the University of Michigan. Follow Wong on X (formerly Twitter) @katewong

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