The report discusses the impacts of a changing climate on ecosystems and human infrastructure in regions with significant presence of permafrost, as well as the
impacts of thawing permafrost on global climate.
Erin Trochim Dr. Erin Trochim (Action Team Postdoctoral Fellow) currently works with the SEARCH Permafrost Action Team to synthesize information on the impacts
of thawing permafrost on infrastructure and ecosystem services.
When organic matter in the permafrost is thawed and decomposes it produces mostly CO2 but also small amounts of methane, particularly so in the wetlands that are prevalent in
areas of thawing permafrost.
Researchers participating in related ABoVE projects will determine how much carbon is stored in Alaska's interior forests, measure
rates of thawing permafrost and release of greenhouse gases, study the effects of wildfire and evaluate the socio - ecological impacts of these changes.
Session speakers guided audience members through current research efforts to understand the Arctic's role in the global weather system, to predict changing sea ice patterns, and to perceive both the global and local
implications of thawing permafrost and shifting hydrology patterns in the Arctic's terrestrial cryosphere.
The first article linked below reports on a recent study that says that «Global warming gases traped in the soil are bubbling
out of the thawing permafrost in amounts far higher than previously thourght and may trigger what researchers warn is a climate time bomb
«Interestingly, we also found that the unique
composition of thawed permafrost carbon is what makes the material so attractive to microbes,» added lead author Robert Spencer, from Florida State University.
Using the University of Victoria Earth System Climate Model adapted to include a permafrost response module, the researchers calculated the contribution to climate
warming of thawing permafrost over a range of varying parameters.
If the system would have been unstable, that would have meant that 1
kg of thawing permafrost would have caused enough additional heating to cause more than 1 kg of permafrost to thaw in addition.
As a
result of the thawing permafrost, the land switched from a carbon sink (net CO2 absorber) to a carbon source (net CO2 emitter) decades earlier than it would have otherwise — before 2100 for every DEP.
Especially worrying is the observation that up to 10 percent of this area is now being punctured by so - called taliks
areas of thawed permafrost that provide avenues for the ready escape of methane and opportunities for warmth to penetrate deep into the frozen hydrate beneath.
What is certain, the team concludes, is that the new data will enable more accurate predictions to be made about the impacts
of thawing permafrost on the climate.
But maybe they could start farming in
all of that thawing permafrost...?
However, this kind of soil drying is often overlooked in research on the impacts
of thawing permafrost.
Applying the «corrected non-linear function» reduces this available budget to just «280 GtC» — this figure does not account for the role of greenhouse gases other than CO2, including the potential impact
of thawing permafrost or methane hydrates.