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Politics : Climate Change
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To: ryanaka who wrote (540)6/11/2019 10:08:43 AM
From: ryanaka  Read Replies (1) of 853
 
"The permafrost, or tundra, is soil that stays below freezing (32 degrees Fahrenheit) for at least two years. Thawing permafrost is a dangerous amplifying feedback loop for global warming because the global permafrost contains twice as much carbon as the atmosphere does today?.

As the permafrost melts, it releases heat-trapping carbon dioxide and methane, and as the coastline disintegrates and erodes, more and more permafrost will be exposed to the warming air and water.


This means, as the planet continues to warm, more permafrost will erode and melt, releasing even more greenhouse gases in a continuous feedback loop.

A 2017 study found the Alaskan tundra is warming so quickly it had become a net emitter of CO2 ahead of schedule. That study was the first to report a major portion of the Arctic had already become a net source of heat-trapping emissions.

As the Arctic warms, the ice retreats — and the recent record Arctic temperatures have led to the second lowest amount of sea ice on record for June (after 2016)."



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