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- Last year I showed these two slides so that demonstrate that the arctic ice cap,
- 去年我给各位展示了两个关于北极冰帽的演示,
- which for most of the last three million years has been the size of the lower 48 states, has shrunk by 40 percent.
- 在过去三百万年中,其面积由相当于美国南方48州面积总和缩减了40%。
- But this understates the seriousness of this particular problem because it doesn't show the thickness of the ice.
- 但这些没能完全说明这个问题的严重性,因为这没有表示出冰帽的厚度。
- The arctic ice cap is, in a sense, the beating heart of the global climate system.
- 感觉上,北极冰帽就好象全球气候系统中跳动的心脏。
- It expands in winter and contracts in summer.
- 冬天心脏舒张,夏天心脏收缩。
- The next slide I show you will be a rapid fast-forward of what's happened over the last 25 years.
- 下面我要展示的是在过去25年里的极剧变化。
- The permanent ice is marked in red.
- 红色的是永冻冰。
- As you see, it expands to the dark blue -- that's the annual ice in winter, and it contracts in summer.
- 你看,它正在变成深蓝色,这是每年冬天形成的年度冰,在夏天永冻冰收缩。
- The so-called permanent ice, five years old or older, you can see is almost like blood, spilling out of the body here.
- 所谓的“永冻”,是指形成五年或更久的冰,你看,这也像血液一样输送到身体各部位。
- In 25 years it's gone from this, to this.
- 在25年的时间里,它从这里到了这里。
- This is a problem because the warming heats up the frozen ground around the Arctic Ocean,
- 值得注意的是,温室效应使得北冰洋周围的冻土层受热,
- where there is a massive amount of frozen carbon which, when it thaws, is turned into methane by microbes.
- 而这里有大量被冻封的碳(干冰),解冻时,微生物降解碳形成甲烷。
- Compared to the total amount of global warming pollution in the atmosphere,
- 如果突破顶点,温室气体排放量
- that amount could double if we cross this tipping point.
- 将是现有大气层中的全球温室污染总量。
- Already in some shallow lakes in Alaska, methane is actively bubbling up out of the water.
- 在阿拉斯加的一些浅湖里已经可以看到水中探头的沼气泡。
- Professor Katey Walter from the University of Alaska went out with another team to another shallow lake last winter.
- 去年冬天,阿拉斯加大学的Katey Walter教授结队去了一个浅湖。
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在TED 2009上,戈尔展示了全球最新的情况,认为气候趋势比科学家预言的更值得担心,并表明他对于“清洁煤炭”的姿态。
来源:可可英语 http://www.kekenet.com/Article/201804/549662.shtml