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Permafrost Thaws as Temperatures Rise Globally
永久冻土随全球升温而融化
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Permafrost is ground frozen for two or more years in cold regions.永久冻土是寒冷地区连续冻结两年或更久的土壤。
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It holds ancient plant matter, ice, and trapped greenhouse gases underground.其中封存着远古植物残骸、冰以及被禁锢在地下的温室气体。
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Thawing permafrost makes land sink and damages roads and buildings.冻土融化导致地面沉降，破坏道路和建筑。
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New lakes form where ice melts and soil collapses unevenly.冰层融化、土壤不均匀塌陷处形成新湖泊。
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Arctic plants grow taller and greener as warmer soil supports more roots.土壤变暖促进根系生长，北极植物因而长得更高更绿。
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Carbon dioxide and methane release from thaw increases global warming.冻土融化释放的二氧化碳和甲烷加剧全球变暖。
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Indigenous communities observe faster landscape changes than before.原住民社区观察到的地貌变化比以往更快。
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Scientists drill into permafrost to study climate records locked in ice layers.科学家钻取冻土冰层样本，研究其中封存的气候记录。