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Permafrost is warming at a global scale.

Boris K Biskaborn1, Sharon L Smith2, Jeannette Noetzli3

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This summary is machine-generated.

Permafrost is warming globally, with significant temperature increases observed across various regions. This warming trend, particularly in the Arctic, has implications for thawing permafrost and the release of soil organic carbon.

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Area of Science:

  • Earth Science
  • Climate Science
  • Environmental Science

Background:

  • Permafrost thaw releases soil organic carbon, potentially amplifying global climate change.
  • A globally consistent assessment of permafrost temperature change has been lacking.

Purpose of the Study:

  • To compile a globally consistent assessment of permafrost temperature change.
  • To evaluate temperature trends in permafrost regions since the International Polar Year (2007-2009).

Main Methods:

  • Utilized a global dataset of permafrost temperature time series.
  • Analyzed data from the Global Terrestrial Network for Permafrost.
  • Focused on the period from 2007 to 2016.

Main Results:

  • Ground temperature increased by 0.39±0.15°C in continuous permafrost zones.
  • Discontinuous permafrost warmed by 0.20±0.10°C, mountain permafrost by 0.19±0.05°C, and Antarctic permafrost by 0.37±0.10°C.
  • Globally, permafrost temperature rose by 0.29±0.12°C, consistent with Arctic amplification.

Conclusions:

  • Permafrost is warming across diverse global regions.
  • Warming in discontinuous zones is linked to increased snow thickness, not necessarily air temperature.
  • Observed permafrost warming trends align with amplified Arctic air temperature increases.