High-severity wildfires in the Alaskan Arctic tundra promote shrub growth, which drives a fire–greening positive feedback loop. The existence of this feedback loop suggests that wildfires have an important role in the changing tundra landscape amid rapid Arctic warming.

中文翻译：

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野火加速了阿拉斯加北极苔原的灌木生长


阿拉斯加北极苔原的严重野火会促进灌木生长，从而推动火绿化正反馈循环。这种反馈循环的存在表明，在北极迅速变暖的情况下，野火在不断变化的苔原景观中发挥着重要作用。