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  • 予人玫瑰，手有余香：加拿大新天地工作移民诚聘求职顾问&行业导师！

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  • Arctic Could Become 'Ice-Free' Within a Decade -krishna(Krishna); 3-6 {166} (#8974@4096) +1
    The Arctic could see summer days with practically no sea ice as early as the next couple of years, according to a new study out of the University of Colorado Boulder.
    • "For scientists, an ice-free Arctic doesn't mean there would be zero ice in the water." -sailor(Ocean & Mountain); 3-6 {348} (#8975@4096)

      researchers say the Arctic is ice-free when the ocean has less than 1 million square kilometers of ice.

      The size of the Arctic Ocean is 14.06 million km². One million km² represents 7.11%. What's the scientifc rationale to define 7.11% of ice covering as the threshold of "ice-free"? I'm wondering.

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