Carbon release through abrupt permafrost thaw

  title={Carbon release through abrupt permafrost thaw},
  author={Merritt R. Turetsky and Benjamin W. Abbott and Miriam C. Jones and Katey Walter Anthony and David Olefeldt and Edward. A.G. Schuur and Guido Grosse and Peter Kuhry and Gustaf Hugelius and Charles D. Koven and David M. Lawrence and Carolyn M Gibson and A. Britta K. Sannel and A. David McGuire},
  journal={Nature Geoscience},
The permafrost zone is expected to be a substantial carbon source to the atmosphere, yet large-scale models currently only simulate gradual changes in seasonally thawed soil. Abrupt thaw will probably occur in <20% of the permafrost zone but could affect half of permafrost carbon through collapsing ground, rapid erosion and landslides. Here, we synthesize the best available information and develop inventory models to simulate abrupt thaw impacts on permafrost carbon balance. Emissions across 2… 

Permafrost carbon emissions in a changing Arctic

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Microbial Community Changes in 26,500-Year-Old Thawing Permafrost

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A Permafrost Implementation in the Simple Carbon-Climate Model Hector

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Decadal-scale hotspot methane ebullition within lakes following abrupt permafrost thaw

Thermokarst lakes accelerate deep permafrost thaw and the mobilization of previously frozen soil organic carbon. This leads to microbial decomposition and large releases of carbon dioxide (CO2) and

Decade of experimental permafrost thaw reduces turnover of young carbon and increases losses of old carbon, without affecting the net carbon balance

The findings highlight the need to estimate long-term responses of whole-year production and decomposition processes to thawing, both in shallow and deep soil layers, as they may contrast and lead to unexpected net effects on permafrost C storage.



21st-century modeled permafrost carbon emissions accelerated by abrupt thaw beneath lakes

Deeper, abrupt thaw beneath lakes will more than double radiative forcing from permafrost-soil carbon fluxes this century, demonstrating the need to incorporate abrupt thaw processes in earth system models for more comprehensive projection of the PCF this century.

Methane emissions proportional to permafrost carbon thawed in Arctic lakes since the 1950s

Warming thaws permafrost, releasing carbon that can cause more warming. Radiocarbon, soil carbon, and remote sensing data suggest that 0.2–2.5 Pg of carbon has been emitted from permafrost as CO2 and

Rapid carbon loss and slow recovery following permafrost thaw in boreal peatlands

It is concluded that the loss of sporadic and discontinuous permafrost by 2100 could result in a loss of up to 24 Pg of deep C frompermafrost peatlands.

Vulnerability of Permafrost Carbon to Climate Change: Implications for the Global Carbon Cycle

ABSTRACT Thawing permafrost and the resulting microbial decomposition of previously frozen organic carbon (C) is one of the most significant potential feedbacks from terrestrial ecosystems to the

Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils

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Permafrost thaw and resulting soil moisture changes regulate projected high-latitude CO2 and CH4 emissions

The fate of currently frozen permafrost carbon as high-latitude climate warms remains highly uncertain and existing models give widely varying estimates of the permafrost carbon-climate feedback.

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Recent warming at high-latitudes has accelerated permafrost thaw in northern peatlands, and thaw can have profound effects on local hydrology and ecosystem carbon balance. To assess the impact of

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A model-based assessment of changes in permafrost area and carbon storage for simulations driven by RCP4.5 and RCP8.5 climate suggests that effective mitigation efforts during the remainder of this century could attenuate the negative consequences of thepermafrost carbon–climate feedback.

Pathway-dependent fate of permafrost region carbon

Permafrost soils in the high northern latitudes contain a substantial amount of carbon which is not decomposed due to frozen conditions. Climate change will lead to a thawing of at least part of the

Observation-based modelling of permafrost carbon fluxes with accounting for deep carbon deposits and thermokarst activity

Abstract. High-latitude soils store vast amounts of perennially frozen and therefore inert organic matter. With rising global temperatures and consequent permafrost degradation, a part of this carbon