在深化寒意，新冰已经蔓延在一望无垠的北冰洋。
In the deepening chill, new ice is already spreading over vast stretches of the Arctic Ocean.
这意味着底层曾存在的任何古冰可能已经融化并被新冰取代了(Science, DOI: 10.1126/science.1200109)。
This could mean that any ancient ice that was once there may have melted and been replaced (Science, DOI: 10.1126/science.1200109).
一项新的研究表明，格陵兰冰盖南部沿线的冰融如今正蔓延到它的西北海岸线。
Melt along the southern edge of Greenland's ice sheet is now moving up its northwest coast, a new study shows.
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