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地理漫步·世界地理英语30篇(9)

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Permafrost Thaws in Warming Climates

Permafrost Thaws in Warming Climates

冻土在气候变暖中消融

  1. Permafrost is ground frozen solid for two or more years.
  2. It covers nearly one-quarter of Earth’s northern land.
  3. Warming temperatures melt ice inside this frozen soil.
  4. Thawing ground sinks, cracking roads and buildings.
  5. Ancient plant matter decomposes, releasing greenhouse gases.
  6. Wildlife habitats shift as tundra turns to shrubland.
  7. Lakes drain or form suddenly when permafrost disappears.
  8. Scientists monitor thaw depth to track Arctic change.
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