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Siberian permafrost thaw warning sparked by cave data

February 24, 2013

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Evidence from Siberian caves suggests that a global temperature rise of 1.5C could see permafrost thaw over a large area of Siberia.

A study shows that more than a trillion tonnes of the greenhouse gases CO2 and methane could be released into the atmosphere as a result.


The records from a particularly warm period called Marine Isotopic Stage 11,
which occurred around 400,000 years ago, suggest that warming of 1.5C compared
to the present is enough to cause substantial thawing of permafrost – even in
areas far north from its present-day southern limit.


“As permafrost covers 24% of the land surface of the Northern Hemisphere,
significant thawing could affect vast areas and release (billions of tonnes) of

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One Comment leave one →
  1. Cheri Elliott permalink
    March 1, 2013 10:43 pm

    This is normal. We have sun cycles which causes periods of warming and periods of cooling. Nothing to be alarmed about.

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