Scientists speculated that much of this ice, some five years or older, would survive the summer melt period.

科学家推测这些冰川至少有5岁，即使在夏季也不会融化。

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Meanwhile, a dozen small ice shelves, which sit on relatively warmer water, produced half the total water from ice melt during the same period.

同时，还有十几个小冰架坐落在相对温暖的水域，同期的融化量占整个融雪量的一半。

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With snowfall reasonably constant over the period, it appears that melt as a result of the 1-2-degree rise in air temperatures has tipped the ice out of balance.

BBC: Canadian glaciers face 'big losses'