[00:01:18]Alun Hubbard is a glaciologist,

这些瀑布叫做冰川锅穴

[00:03:36]studying the enormous power

冰河学家艾伦·哈伯德

[00:05:13]of these waterfalls, which are known as moulins.

研究的便是它们的巨大能量

[00:07:35]We've got this amazing moulin going off here today.

今天我们找到了这个非凡的冰川锅穴

[00:13:42]The water's overflowing from the lake, which is beginning to drain.

从湖里溢出来的水正在慢慢流干

[00:18:20]Tonnes of water cas cading down this pipe that is, effectively,

无数吨的水从这里倾泻而下

[00:23:29]plummeting to the depths of the ice sheet through

相当于是从一千米高的冰川上

[00:26:39]over a kilometre of vertical ice.

骤然跌落至冰原最深处

[00:29:30]Alun is here to study where the melt water goes

艾伦来这里是为了研究这些水流去了哪里

[00:40:07]and what effect it has on the remaining ice.

以及剩下的冰川会受到什么影响

[00:43:11]To do that,

为此

[00:43:59]he needs to find a moulin that has recently run dry.

他要找到一个刚流干的冰川锅穴

[00:46:55]Just a week ago, there was

仅一个星期前 这里有一个

[00:50:54]a three-mile long, ten-metre deep lake here.

三英里长 十米深的湖

[00:58:31]The weight of all that water cracked the ice beneath

这些水的重量把下面的冰都压碎了

[01:03:19]and the lake drained in just a few hours

湖水倾泻而出

[01:05:37]with incredible force.

几小时内就流干了