The cause is unclear, but rising ocean levels and nitrogen dumped from the New York City sewer system are likely culprits.
造成这种现象的原因仍不明朗，但是海平面的日益增长和纽约下水道系统倾倒的氮化合物是可能的元凶。
Were it to melt entirely, Greenland's icesheet would drive up ocean levels by some seven metres (23 feet), drowning coastal cities around the world.
如果格陵兰冰原完全融化，世界各地海洋水平面将会上升7米（23英尺）左右，淹没沿海城市。
Likewise, a study published in January 2010 concluded that, over the past 100,000 years, rising and falling ocean levels alternately opened and closed the Bering Strait.
同样的，据2010年1月发表的一篇研究推测，在过去10万年间，海平面的涨落，使白令海峡交替开合。
Likewise, a study published in January 2010 concluded that, over the past 100, 000 years, rising and falling ocean levels alternately opened and closed the Bering Strait.
同样的，据2010年1月发表的一篇研究推测，在过去10万年间，海平面的涨落，使白令海峡交替开合。
Ice caps and glaciers are melting. Ocean levels are rising.
冰盖和冰川正在融化。海洋水平线正在上升。
Ocean levels would keep on rising after 2100 and "several meters of sea level rise must be expected over the next few centuries."
2100年以后，海平面还将继续上升，预计在未来几个世纪可能上升好几米。
Ocean levels would keep on rising after 2100 and "several meters of sea level rise must be expected over the next few centuries."
2100年以后，海平面还将继续上升，预计在未来几个世纪可能上升好几米。
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