Alun Hubbard is a glaciologist,
這些瀑布叫做冰川鍋穴
studying the enormous power
冰河學家艾倫·哈伯德
of these waterfalls, which are known as moulins.
研究的便是它們的巨大能量
We've got this amazing moulin going off here today.
今天我們找到了這個非凡的冰川鍋穴
The water's overflowing from the lake, which is beginning to drain.
從湖里溢出來的水正在慢慢流干
Tonnes of water cas cading down this pipe that is, effectively,
無數噸的水從這里傾瀉而下
plummeting to the depths of the ice sheet through
相當于是從一千米高的冰川上
over a kilometre of vertical ice.
驟然跌落至冰原最深處
Alun is here to study where the melt water goes
艾倫來這里是為了研究這些水流去了哪里
and what effect it has on the remaining ice.
以及剩下的冰川會受到什么影響
To do that,
為此
he needs to find a moulin that has recently run dry.
他要找到一個剛流干的冰川鍋穴
Just a week ago, there was
僅一個星期前 這里有一個
a three-mile long, ten-metre deep lake here.
三英里長 十米深的湖
The weight of all that water cracked the ice beneath
這些水的重量把下面的冰都壓碎了
and the lake drained in just a few hours
湖水傾瀉而出
with incredible force.
幾小時內就流干了