Humans first settled in the Arctic a mere 4,500 years ago, surviving by exploiting sea mammals and fish.
人类最早在4500年前定居在北极，靠捕捞海洋哺乳动物和鱼类生存。
Indeed, for the Arctic as a whole, the melt season started with even more thin ice than in 2007, hence concerns that we may even beat last year's sea-ice minimum.
确实，把北极看作一个整体，融化季节开始的时候，海冰总量比2007年还要少，因此可能会突破去年海冰量的最低点。
An arctic tern, on its 20,000 km flight from the extreme south of South America to the Arctic circle, will take no notice of a nice smelly herring offered from a bird-watcher's boat along the way.
北极燕鸥在从南美洲的最南端飞往北极圈的路线全长2万公里，但燕鸥这一路上都不会留意观鸟船送来的散发臭味却又可口的鲱鱼。
This is troubling as climbing arctic temperatures combined with rapid sea ice loss are creating a new type of climate feedback loop which could accelerate Arctic warming.
这是令人担忧的，因为北极气温上升和海冰迅速消失正在形成一种新型的气候反馈回路，可能会加速北极变暖。
The Canadian Arctic is a vast, treeless polar desert that's covered with snow for most of the year.
加拿大的北极是一个广阔的、没有树木的极地沙漠，一年中大部分时间都被雪覆盖着。
Some 10,000 pairs of the birds, called fulmars, a kind of Arctic seabird, make their nests on Devon Island, north of the Arctic Circle.
在北极圈以北的德文岛上大约有一万对鸟在那里筑巢，它们被称为管鼻鹱，是一种北极海鸟。
Brittleness remains a problem when building steel structures in cold conditions, such as oil rigs in the Arctic.
对于在寒冷条件下建造钢结构，比如北极的石油钻井平台，如何解决材料的脆性仍然是一个问题。
But in some waters, such as those of the Arctic, a warming will make conditions worse for phytoplankton.
但在某些水域，如北极水域，气候变暖将使浮游植物的生存条件变得更加恶劣。
In some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will turn greener.
在一些水域，比如北极，气候变暖会使浮游植物生长成熟，而这些区域会变得更绿。
The Arctic sea ice holds a central position in the Earth's climate system and it's deteriorating faster than expected.
北极海冰在地球气候系统中占据中心位置，并且它恶化的速度比预期的更快。
The shaft of the ceremonial mace is the whorled tusk of a narwhal, a small Arctic whale. The door handles are of walrus tusk.
仪式权杖柄是用一种小型的北极独角鲸的牙齿制成的。门柄是用海象的牙齿制成的。
Shubin distinguished himself by leading an expedition to the Arctic, which uncovered the remains of a fish with a wrist-a creature with part fin and limb.
舒宾的杰出成就是带领了一次北极探险。在这次探险中，他们发现了一种半鳍半肢的动物——一条有腕的鱼化石。
With so much at stake, the Inuit are determined to play a key role in teasing out the mysteries of climate change in the Arctic.
面临如此多的危险，因纽特人决心在揭开北极气候变化之谜方面发挥关键作用。
Scientists are increasingly keen to find out what's going on because they consider the Arctic the "canary in the mine" for global warming—a warning of what's in store for the rest of the world.
科学家们越来越想知道到底发生了什么，因为他们认为北极是全球变暖中“煤矿中的金丝雀”——是对世界其他地方即将发生的事情的警告。
Around a thousand years ago, one group emerged that was uniquely well adapted to cope with the Arctic environment.
大约一千年前，一个对北极环境有独特适应力的群体出现了。
Overall, Earth is warming at a rapid pace—2014 through 2017 rank as the hottest years on record—and the Arctic is warming twice as fast as anyplace else on Earth.
总的来说，地球正在快速变暖——2014年到2017年是有记录以来最热的年份，北极的变暖速度是地球上其他地方的两倍。
The tale goes onto detail an adventure wherein the Doctor and Martha join a French Arctic Expeditionist.
这个故事详细介绍了医生和玛莎加入了法国北极探险队经历的一次冒险。
Conversely, he said, mammals that live in arctic regions develop a layer of fat to insulate against the cold.
他还说：相反，居住在北极地区的哺乳动物长出了一层脂肪，起到了御寒的作用。
A segment of bird deaths in the Arctic, he explained, are strange and, in a way, even comical.
一部分北极地区鸟儿的死亡很奇怪，从另一角度看，甚至是很滑稽的，他解释道。
The hut stands at the foot of a near vertical wall of rock in an icy fjord in the high Arctic, a week away by dog sled from the nearest human settlement.
小屋坐落在高纬度北极地区峡湾边一座几乎是垂直的山岩下，从最近的有人居住的地方到此地，狗拉的雪橇要走一个星期。
She and other scientists are researching whether there might be a 'tipping point' for Arctic sea ice -a point at which sea ice will disappear and never recover, even if the climate cools.
她与同事致力于研究对于北冰洋上的海冰是否存在一个不可逆转的“消融点”，一旦达到该点即使气候转凉海冰也无法恢复原来的覆盖量。
That data gives them a much deeper understanding of what's happening to Arctic ice, a big improvement over what you can get from satellites, which struggle to measure ice below the water level.
凭借那些数据，他们可以对北极冰的情况有一个更深的了解。这对比起通过卫星得到的了解来说是种巨大的进步，因为卫星要测量水位线下的冰是挺费力的。
The researchers studied the East Siberian Arctic Shelf, a section of the Arctic Ocean just north of Siberia.
研究人员研究了东西伯利亚北极大陆架，西伯利亚以北的北冰洋的一段。
At that point, Arctic ice becomes a memory, and we will find ourselves on a very different planet.
到那时候，北极冰将会是一种记忆，而我们会发现我们的星球不同以往了。
THE Arctic has been a fashionable destination this summer.
北极地区在今夏成了一个时髦的目的地。
High in the Canadian Arctic is a glacier-carved valley that is like none other on Earth.
高纬度的加拿大北极区是一个冰川覆盖的山谷，是地球上一个与众不同的地方。
The Chinese have diverted part of the Irtysh river, which feeds Russia's Ob river and ends up in the Arctic, to a canal supplying the booming oil town of Karamai.
中国改变了额尔齐斯河（由南至北流经俄罗斯的鄂毕湾河，并最终汇入北极）的部分流向以便开凿出一条补给新兴石油城市克拉玛依的运河。
In 2006, a hunter in the Canadian Arctic shot a bear that had white fur like a polar bear's but had brown patches, long claws and a hump like a grizzly bear's.
2006年，一位猎人在加拿大的北极地区射杀了一只奇怪的熊，它的皮毛如同北极熊一般呈现出白色，但夹杂着褐色斑点，长爪子和弓起的背部又表现出灰熊的特征来。
In 2006, a hunter in the Canadian Arctic shot a bear that had white fur like a polar bear's but had brown patches, long claws and a hump like a grizzly bear's.
2006年，一位猎人在加拿大的北极地区射杀了一只奇怪的熊，它的皮毛如同北极熊一般呈现出白色，但夹杂着褐色斑点，长爪子和弓起的背部又表现出灰熊的特征来。
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