Scientists fear that the shifting Arctic climate could threaten the species' survival.

科学家们担心，北极气候的不断变化可能会威胁物种的生存。

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A look at Arctic climate changes over the past 5 million years shows it always amplifies global temperatures.

从北极过去5百万年的气候变化看，它总是将全球气温变化的幅度放大。

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In other words, even as Arctic climate continues to warm over the long-term, there won't be a new record low ice extent each year.

换句话说，即使北极的气候长时间在持续变暖，也并不会出现每年都会出现更低的海冰范围记录。

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The ice is important because it helps keep the Arctic cold and reduces extremes in the Earth's climate.

VOA: special.2009.10.27

Arctic melting could also affect Earth's climate.

VOA: special.2009.05.05

Dr. ROBERT CORELL (Chairman, Arctic Climate Impact Assessment): Climate change is a real issue now.

NPR: Oceanographer Sees Real Effects of Climate Change

In fact, 30 years in the history of Arctic climate is no more than a blink.

BBC: Harrabin's Notes: Frozen assets

However, these discoveries often are regions not very hospitable, such as an Arctic climate or areas with a high political risk.

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