The research indicates that Earth's climate may have multiple states based on this feedback cycle, meaning that the climate could change qualitatively in response to the effects of global warming.

研究表明，地球气候可能有很多种基于反馈周期的说法，这意味着全球变暖会引起气候变化质的反应。

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The study identified eight of these so-called natural "feedback mechanisms" that have become both symptom and cause of climate change.

这项研究确认了8个所谓自然“反射机制”的征兆和气候改变的原因。

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He said it shows yet another "positive feedback" in global warming, where one aspect of climate change makes something else worse and it works like a loop.

他说，它还没有显示另一个全球变暖的“积极反馈”，就是气候的变化会引起一些更坏的事情，它的作用就像是一个循环。

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The authors say that the predicted shallow depth of these methane reserves means that they could be destabilised by climate change, and might act as a positive feedback on global warming.

BBC: Antarctic may host methane stores

Many who accept that mankind is changing the climate disagree on how much and how quickly things will change projections into the future rely on models whose feedback loops are constantly being refined, and which are the source of much debate.

ECONOMIST: Leaked e-mails do not show climate scientists at their best