地理漫步·世界地理英语30篇(9)
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Permafrost Thaws in Warming Climates
冻土在气候变暖中消融
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Permafrost is ground frozen solid for two or more years.永久冻土是指连续冻结两年或更久的土壤。
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It covers nearly one-quarter of Earth’s northern land.它覆盖了地球北半球近四分之一的陆地。
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Warming temperatures melt ice inside this frozen soil.气温升高导致这种冻土内部的冰融化。
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Thawing ground sinks, cracking roads and buildings.冻土消融后地面下沉,使道路和建筑开裂。
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Ancient plant matter decomposes, releasing greenhouse gases.远古植物残体分解,释放温室气体。
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Wildlife habitats shift as tundra turns to shrubland.随着苔原变为灌木丛,野生动物栖息地随之改变。
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Lakes drain or form suddenly when permafrost disappears.永久冻土消失时,湖泊可能突然干涸或形成。
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Scientists monitor thaw depth to track Arctic change.科学家通过监测消融深度来追踪北极变化。