融水可能透过冰层，流经冰川壶穴这样的自然管道而消失，有的科学家对这个消失的速度非常困惑。
For some time scientists were puzzled by the speed with which meltwater could disappear through the ice as it drained down natural pipes known as moulins.
这些个冰穴说明，有三处暖流从冰川下的凹陷处升上来导致海冰融化了。
The polynyas suggest that the warm water exits the cavity beneath the glacier in three locations where the sea ice has melted.
南极洲的冰穴和松岛冰川。
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