This year they noted that the Arctic ice cap had a late-winter growth spurt, reaching its maximum on March 31st, the latest date ever recorded.

今年，科学家们注意到晚冬时节北极冰盖突然迸出的现象，3月31日达到最高值- - -这是至今所记录的最新数据。

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The Arctic ice cap fluctuates with the seasons, growing in the freezing winter and shrinking over the summer.

北极冰盖随季节而变化，在严寒的冬季增长而在夏季则会减少。

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He is expected to warn ministers in polar regions that the arctic ice cap may totally disappear in as little as five years if nothing is done to curb greenhouse emissions.

他会警告负责极区的部长，如果再不下措施抑制温室气体的排放，则北极的冰帽将在五年内完全消失。

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We do know that the Arctic ice cap is melting faster than was predicted even five years ago.

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Researchers are using a nuclear submarine to take them beneath the Arctic ice cap to study ocean currents that may have an effect on global climate.

CNN: Nuclear sub dives under the ice to explore climate change

It's the cue for effusive guide Fridjon Thorleifsson to introduce the surrounding Columbia Icefield, a 77-square-mile web of six silvery tentacles between Jasper and Banff, and the largest ice cap south of the Arctic Circle.

BBC: The perfect trip: The Canadian Rockies