BBC纪录片《冰冻星球》履于薄冰第11期:让湖水消失的洞穴
艾伦的团队已经找到了让湖水消失的洞穴
[00:03:40]and they want to have a closer look.
他们想要来个近距离观察
[00:06:17]It's not a job for anyone with a fear of heights.
这对恐高的人来说是绝不可能的
[00:16:10]As you can see, it's dry up here,
可以看到这里已经干涸
[00:17:31]but if you listen,
但如果仔细听
[00:18:37]you can hear the thunder of,
便能听到大量的流水
[00:20:04]there's a lot of water entering it at some depth.
从深处贯入其中的隆隆声
[00:24:54]Alun wants to place a sensor deep into the moulin
艾伦想在冰川锅穴深处安装一个传感器
[00:28:25]to discover how much water is flowing through the ice.
来研究有多少水在冰川里穿梭
[00:37:36]As they drop, they travel back in time.
向下深入的时候 他们仿佛回到了从前
[00:42:52]30 metres down and they reach ice formed from snow that fell
三十米深处的冰是一万年前
[00:47:05]10,000 years ago, in the last Ice Age.
冰河世纪时期的降雪堆积起来的
[00:52:36]When this lake drained and the plug got pulled
一旦湖水干涸 就像打开了阀门
[00:56:12]and the whole lot flushed down through here,
整个水流都会从这冲刷而下
[01:00:25]this ice sheet, it rose by a metre
这块冰原就会增高一米
[01:03:26]as that water accessed the bed and forced,
因为水流到了冰床之下
[01:06:11]jacked up the ice sheet.
迫使冰原提升
[01:07:59]So, we know that the water
我们知道
[01:09:28]in this whole plumbing cavity system, down here,
水在这整个垂直坠落过程中
[01:13:45]we know that shoots straight through that ice
径直冲破了冰川
[01:16:40]and actually hits the bed of the ice sheet.
直接撞击了冰原的底部
[01:19:43]We've hit the water, I can see the water now.
我们到水边了 我能看到水了
[01:22:21]Great. Nice work.
很棒 干得漂亮
