Partly it's growing evidence that feedback loops amplifying the effects of man-made greenhouse gas emissions are stronger than previously realized.
另一部分是因为有关人造温室气体排放带来的影响在反馈循环系统中不断扩大的证据在不断增加，比之前意识到的更为严重。
That in turn would trigger one of the many positive feedback mechanisms that could speed up the warming effects of greenhouse gases.
这反过来会引发一种恶性循环，它可以加速温室气体的温室效应。
This is potentially a positive feedback mechanism which could increase the impact of greenhouse gases such as CO2. The research is published in the journal Geophysical Research Letters.
这有可能成为正面回馈机制，使得二氧化碳等温室效应气体的影响力加大。此研究发表于《地球物理研究通讯》期刊上。
One feedback loop that does seems certain, though, is that the melting Arctic will enable the extraction of more fossil fuel, with all that that implies for greenhouse-gas emissions.
不过有一个正反馈循环倒是确定的：融化的北极将导致更多化石能源的采掘，而这又意味着温室气体的排放。
One feedback loop that does seems certain, though, is that the melting Arctic will enable the extraction of more fossil fuel, with all that that implies for greenhouse-gas emissions.
不过有一个正反馈循环倒是确定的：融化的北极将导致更多化石能源的采掘，而这又意味着温室气体的排放。
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