BBC紀(jì)錄片《冰凍星球》履于薄冰第16期:冰架破裂

[00:00:23]Andy Smith works for the British Antarctic Survey. 安迪·史密斯在英國(guó)南極調(diào)查局工作 [00:05:22]What we have here is one kilo of pentolite explosive. 這里有一公斤炸藥 [00:09:06]We're going to use this to generate a shockwave 我們將用它釋放出沖擊波 [00:12:23]and record the echoes that come back from underneath the ice. 同時(shí)記錄地下冰層的反饋數(shù)據(jù) [00:17:58]Andy is particularly interested in mapping 安迪對(duì)描繪沿海 [00:22:49]the underside of the ice around the coast. 地下冰層的結(jié)果十分感興趣 [00:26:59]Because here, it isn't resting on land. 因?yàn)樵谶@里 冰塊并非固定在陸地上 [00:30:30]It's floating on sea water, 而是漂浮在海面上 [00:32:42]so if sea temperatures rise just a little, 因此 如果海水溫度稍有上升 [00:35:43]it can be melted from below. 它的下端就會(huì)融化 [00:37:36]Around the coast of Antarctica, 南極大陸海岸周圍 [00:42:07]the glaciers have flowed out across the sea 冰川沿海面向外漂浮 [00:44:15]to form immense masses of floating fresh water ice, 形成了廣袤無(wú)邊的浮動(dòng)淡水冰層 [00:47:49]called ice shelves. 被稱為冰架 [00:49:51]These freeze to the land around them, 冰架在陸地四周凝結(jié) [00:56:49]sticking fast and acting like bathplugs, 像浴缸塞一樣緊緊卡住 [00:58:59]holding back the flow of the glaciers into the sea. 防止冰川流入海中 [01:05:46]On the Antarctic Peninsula, a one-degree sea temperature rise 過(guò)去三十年中 南極半島上 [01:09:37]has helped to break apart 溫度每升高一度 [01:10:57]seven major ice shelves in the last 30 years. 就會(huì)分裂掉七個(gè)主要的冰架 [01:16:07]This is the Larsen B ice shelf, 這是拉森B號(hào)冰架 [01:18:39]three times the size of Greater London, breaking apart in 2002. 有大倫敦區(qū)三倍大 于2002年分裂 [01:21:59]Afterwards, the glaciers it had been holding back 后來(lái) 之前被抑制的冰川 [01:28:05]started flowing up to six times faster. 開始以七倍的速度流走 [01:35:01]In 2008, a much larger ice shelf 2008年 在半島南端 [01:37:35]at the southern end of the Peninsula started to break up. 一塊更大的冰架開始破裂 [01:40:25]It's an enormous event that's never been filmed before. 人類從來(lái)沒有記錄過(guò)這么大的一次破裂

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