Their roots don't grow very deep, so the permafrost doesn't interfere with their growth.
它们的根长得不深，所以永久冻土不会影响它们的生长。
Beneath this active layer is a second layer called "permafrost", which is frozen all year around, and is impermeable to water.
在这一活跃层下面，是被称为“多年冻土”的第二层，终年冻结，不透水。
There're two reasons for this: first, they live in the active layer, which, remember, contains water that doesn't penetrate the permafrost.
造成这种情况的原因有两个：首先，它们生活在活动层中，请记住，活动层中包含的水不会渗透永久冻土。
Geologists think that this fluidized ejecta crater indicates that a layer of permafrost, or water ice, lies just a few meters under the surface.
地质学家认为，这个具有流体化喷出物的陨石坑表明，在地表下几米深处有一层永久冻土层或水冰。
The answer may be that virtually all the water on Mars is now locked in the permafrost layer under the surface, with more contained in the planet's polar caps.
答案可能是，现在火星上几乎所有的水都被锁在地表下的永久冻土层中，更多的水被包含在这个星球的极地冰帽中。
It is practically all ice -permafrost - and it is thawing.
几乎到处是冰——永冻土层——现在都在融化。
An example of a tipping point is the thawing of the permafrost.
“气候引爆点”的一个例子就是永久冻土层的融化。
As the permafrost melts, the land loses its capacity to absorb water.
由于冻土融化，陆地会失去吸水性。
"These permafrost deposits are now melting and releasing their methane," said Maslin.
“这些永久冻土中的沉积物开始融化，并释放出甲烷，”麦斯林说。
Not in the center. It is full of lakes, rivers and low vegetation resting on permafrost.
中心地区山不多。那里湖泊河流密布。低矮的植物生长在永久的冻土上。
Not in the center. It is full of lakes, rivers and low vegetation resting on permafrost.
中心地区山不多.那里湖泊河流密布.低矮的植物生长在永久的冻土上.
Warming temperatures may also help uncover archaeological evidence buried under permafrost.
温暖的气候也会帮助揭开哪些尘封在冻土之下的考古真相。
Their growth will likely counterbalance some of the increased emissions from melting permafrost.
植物的生长或许可以在某些程度上平衡由于永久冻土融化而不断增加的碳排放。
It is estimated that some 50 billion tons of CH4 could be trapped in the Siberian Lake permafrost.
据估计，可能约有500亿吨甲烷被困在西伯利亚湖永久冻土中。
It also can be released directly as stored methane already in the permafrost is released as it thaws.
冰冻在永冻层中的甲烷也能随着永冻层的融化而释放。
Yakutsk is the largest city in the world built on permafrost - soil that remains permanently frozen year round.
雅库茨克是世界上建设在永久冻土上最大的城市——土壤在全年都保持冰冻。
The boreal forest will creep northwards, for example, as the permafrost thaws and carbon fertilisation increases.
例如，随着冻土融解，二氧化碳增多，针叶林将继续北移。
Other positive climate feedbacks that operate in the Arctic include the thawing of permafrost and vegetation changes.
在北极发生的其它气候正反馈还包括永久冻土融化和植被变化。
Guodong explains that the construction impact posed a greater threat to the plateau permafrost than global warming.
成国栋解释说，建设过程中对青藏高原永冻层所造成的威胁比全球气候暖化大。
Methane is released when organic material in the thawing permafrost decomposes, which gradually releases methane.
当永冻层融化，其中的有机物质分解就会释放甲烷。
Ice will vanish from Arctic summers and some mountaintops, permafrost will become impermanent, sea levels will keep rising.
在夏季，冰会从北极和一些山顶消失，永冻层将会变得“无常”，海平面将继续上涨。
While landslides can occur naturally, scientists say there is unmistakable evidence that Yamal's ancient permafrost is melting.
科学家表示，虽然山体滑坡会自然发生，但明确无误的证据表明，亚马尔古老的永久冻土层正在融化。
A tuft of hair trapped in permafrost around 4, 000 years ago has yielded DNA for the first sequence of an ancient human genome.
发现于约4000年前的冻土中的一簇头发携带有一个古人类基因组的第一个序列的DNA。
The Storflaket permafrost plateau bog near Abisko in northern Sweden shows cracks at its borders due to thawing of the permafrost.
在靠近瑞典北部阿比斯库的Storflaket高原多年冻土沼泽由于冻土融化在其边缘处出现了裂缝。
Thawing permafrost leads to releases of methane and other carbon compounds that can reach the atmosphere and increase greenhouse warming.
永久冻土融化导致甲烷和其他碳化合物释放到大气层，增加温室效应。
Thawing permafrost leads to releases of methane and other carbon compounds that can reach the atmosphere and increase greenhouse warming.
永久冻土融化导致甲烷和其他碳化合物释放到大气层，增加温室效应。
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