Permafrost Carbon Network

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We Must Stop Fossil Fuel Emissions to Protect Permafrost Ecosystems

(June 2022)

The policy implications are clear: the faster we reduce human emissions and draw down atmospheric CO2, the more of the permafrost domain we can save

We summarize terrestrial and marine changes in the permafrost domain with an eye toward global policy. Emissions reduction targets must be strengthened and accompanied by support for local peoples to protect intact ecological communities and natural carbon sinks within the permafrost domain. We call on leaders, corporations, researchers, and citizens everywhere to acknowledge the global importance of the permafrost domain and work towards climate restoration and empowerment of Indigenous and immigrant communities in these regions.

Click here for the full paper


 

Microbiome assembly in thawing permafrost and its feedbacks to climate

(June 2022)

This perspective piece describes the power of applying Assembly Theory to understanding microbial control of carbon and nitrogen cycling and climate feedbacks from thawing permafrost.

The perspective proposes ideas about how disturbance intensity, time, and space affect the post-thaw microbiome as well as how these interact with the ecological and phylogenetic breadth of microbial functional guilds. From this, the authors predict the cumulative effects of assembly processes influencing the functioning of post-thaw ecosystem.

Click here for the full paper


 

Expert assessment on subsea permafrost carbon stocks and climate change sensitivity

(December 2020)

This expert assessment is the first circumarctic assessment of the quantity and climate sensitivity of organic matter and methane hydrates on the continental shelves of the Arctic Ocean

Estimates by experts show that the Arctic shelves contain about 560 billion tons of carbon stored as organic matter and 45 billion tons of methane trapped in hydrate form (locked in ice). Subsea permafrost greenhouse gas accutns to about 140 million tons of CO2 and 5.3 million tons of CH4.

Click here for the full paper


 

synthesis on radiocarbon in CO2, CH4, DOC, and POC in Permafrost

(September 2020)

This newest synthesis got published in Global Biogeochemical Cycles assesing the potential for mobilization of 14C measurements from the Northern Permafrost Region

New synthesis of 1,900 measurements of radiocarbon in CO2, CH4, DOC, and POC in the Northern Permafrost Region. This synthesis suggests widespread but not universal release of permafrost soil organic carbon following thaw.

Click here for the full paper


 

synthesis on abrupt thaw and carbon Published in Nature Geoscience

(February 2020)

This synthesis provides a first estimate of thermokarst (abrupt thaw) carbon emissions using numerical models. Abrupt thaw occurs in <20% of the permafrost zone but could double permafrost carbon emissions.

Click here for the full paper


 

winter CO2 flux synthesis published in Nature Climate Change

(October 2019)

Natali et al. write: Our results provide a baseline for winter CO2 emissions from northern terrestrial regions and indicate that enhanced soil CO2 loss due to winter warming may offset growing season carbon uptake under future climatic conditions.

Click here for the full paper


IPCC Special Report on the Ocean and Cryosphere in a Changing Climate (SROCC)

(September 2019)

The newest synthesis of the Permafrost Carbon Network got published in Nature Climate Change.

SROCC Polar Regions Chapter 3.4 focuses on 'Arctic Snow, Freshwater, Ice and Permafrost: Changes, Consequences and Impacts'. Members of the Permafrost Carbon Network took a leadership role in the report. Read the Report here

Download the Summary for Policymakers here


EOS article on CO2 flux synthesis efforts

(September 2019)

Is the Northern Permafrost Zone a Source or a Sink for Carbon?' This EOS article features our work on carbon fluxes in the circumpolar Arctic. Click here for the EOS article.

 


Permafrost collapse is accelerating carbon loss

(April 2019)

A new Nature Comment authored by Merritt Turetsky and members of the Permafrost Carbon Network shows that a sudden collapse of thawing soils in the Arctic might double the warming from greenhouse gases released from tundra.

Read the Nature Comment here

 


New Synthesis on soil thermal regimes in permafrost

(August 2018)

Vegetation and soils strongly influence ground temperature in permafrost ecosystems across the Arctic and sub-Arctic. These effects will cause differences rates of permafrost thaw related to the distribution of tundra and boreal forests. As the distribution of forests and tundra change, the effects of climate change on permafrost will also change. We review the ecosystem processes that will influence permafrost thaw and outline how they will feed back to climate warming.

Loranty MM et al. 2018 Reviews and syntheses: Changing ecosystem influences on soil thermal regimes in northern high-latitude permafrost regions Biogeosciences 15 5287–313. https://doi.org/10.5194/bg-15-5287-2018


New Permafrost model intercomparison published

(April 2018)

The results from this model intercomparison suggest that effective mitigation efforts during the remainder of this century could attenuate the negative consequences of the permafrost carbon–climate feedback.

McGuire AD et al. (2018) The dependence of the evolution of carbon dynamics in the Northern Permafrost Region on the trajectory of climate change (in press)Proceedings of the National Academy of Sciences https://doi.org/10.1073/pnas.1719903115


New EOS article featuring our work on methane

(March 2018)

Understanding High-Latitude Methane in a Warming Climate

Climate change could spur greenhouse gas release from the Arctic. A new project will synthesize existing data to improve uncertain predictions.

 

Read the EOS article here


New synthesis on yedoma permafrost

(September 2017)

This new synthesis on deep Yedoma permafrost summarizes our knowledge on the 130 gigatons of organic carbon in Yedoma

Strauss J et al. 2017 Deep Yedoma permafrost: A synthesis of depositional characteristics and carbon vulnerability. Earth-Science Reviews. https://doi.org/10.1016/j.earscirev.2017.07.007

 


Resolving a methane mystery in the arctic

(July 2017)

International Workshop to Reconcile Methane Budgets in the Northern Permafrost Region; Seattle, Washington, 7–9 March 2017

There is a clear need for the scientific community to better understand the sensitivity of methane emissions to ongoing climate change in the northern permafrost region.

Read the EOS article here


NEW Synthesis on distribution of thermokars landscapes published in Nature communications

(October 2016)

New map allows scientists to predict future greenhouse gas emissions that follow permafrost thaw

Olefeldt D et al. (2016) Circumpolar distribution and carbon storage of thermokarst landscapes. Nature Communications, 7, 13043. doi:10.1038/ncomms13043


NEW Synthesis on potential carbon emissions after permafrost thaw published in nature climate change

(June 2016)

Carbon emissions from aerobic and anaerobic incubation studies and with increases in temperature, two meta-analyses

Schädel C et al. (2016) Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils. Nature Clim. Change, 6, 950-953. doi:10.1038/nclimate3054

 

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