一块面积达到100平方英里的浮冰岛已经从格陵兰两大冰川之一崩离，用科学家的话来说，这块浮冰岛的崩落是近50年北极同类事件中最大的一个。
An ice island with an area of 100 square miles has broken off from one of Greenland's two main glaciers in what scientists say is the biggest such event in the Arctic in nearly 50 years.
近几十年来，北极气温的上升速度是世界其他地区的两倍，这种现象被称为极地放大效应 。
Temperatures in the Arctic have risen twice as fast as the rest of the world in recent decades, a phenomena known as Arctic amplification.
根据美国地质勘查局估算，包括阿拉斯加海岸在内的北极海底蕴藏着全球未开采油气资源的22%，这些资源如今正因冰盖的融化离人们越来越近。
That has opened more access to areas holding about 22 percent of the world's untapped oil and natural gas, including deposits off Alaska, according to U.S. Geological Survey estimates.
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