Observations of the Arctic reveal that the Arctic Ocean is covered by less ice each summer than the previous summer.

对北极的观察显示，每个夏天北冰洋上面覆盖的冰川都比前一个夏天的要少。

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All Arctic ice may disappear during the summer in less than 100 years.

在不到100年的时间里，所有的北极冰都可能在夏季消失。

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Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species.

某些种类的北极鸟受到近来雪雁数量急剧增加的威胁，这些雪雁在北极繁殖，并且正在取代生命力较弱的鸟类。

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Canada's Mackenzie river valley is again being explored, as, more modestly, is its less promising Arctic offshore.

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The Inuit represent less than half the Arctic's indigenous people, who in turn account for only 10% of the region's population.

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But while enthusiastic about adventures the future may hold, Brossier is aware that others -- especially those with young children -- may find his nomadic lifestyle in the Arctic chill less than appealing.

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