For years, scientists have pointed to warming permafrost in the Arctic tundra as a source for increased carbon in the atmosphere; as this soil warms, it releases greenhouse gases that have long been trapped in frozen ground.

Thawing permafrost affects plant and soils in tundra ecosystems, and ultimately the storage of carbon in permafrost soils.
 The surface of tundra subsides as ice in permafrost melts and drains. This can mask…

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Source: archeo