Losing sea ice cover in the Arctic would affect everything from the obvious, such as people who live in the far north and polar bears, to global weather patterns, said Serreze.

谢瑞兹说，失去北极海面上的冰会影响每一样东西——从显而易见的，如同住在极北之地的人们和北极熊，到全球气候模式。

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"Polar bears are unlikely to survive as a species if there is an almost complete loss of summer sea-ice cover," the report said.

如果在夏季海上冰川全部消失，北极熊作为一个物种将无法存活下来。

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Nicklen said that polar bears could face extinction within 50 to 100 years if ice continues to recede.

Nicklen说，如果冰线继续消退的话，在50年到100年内，北极熊就会面临灭绝。

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"Had the polar bear been listed prior to January 9 as the law required, that lease sale could not have moved forward without some substantial additional review of the impacts to polar bears, " said Siegel.

CNN: Polar bear now listed as 'threatened' species

"We will continue to work with our partners to reduce the pressure that trade in polar bear parts puts on this iconic arctic species, even as we take on the longer term threat that climate change poses to polar bears, " he said.

CNN: World rejects new protections for polar bears

"The grim news about polar bears and sea ice decline is horrifying, but it is a call to action, not despair, " said Kassie Siegel of the Center for Biological Diversity.

BBC: NEWS | Science/Nature | US predicts polar bear meltdown