Permafrost

Global Warming Forecasts - Permafrost

2020 - Melting Permafrost

2020 – 2030.  Time frame when irreversible climate tipping point is projected to occur due to carbon outgassing from melting permafrost.  “An irreversible climate ‘tipping point’ could occur within the next 20 years [between 2010 and 2030]  as a result of the release of huge quantities of organic carbon locked away as frozen plant matter in the vast permafrost region of the Arctic, scientists have found. [What is a 'tipping point'?] Billions of tons of frozen leaves and roots [containing carbon] that have lain undisturbed for thousands of years in the permanently frozen ground of the northern hemisphere are thawing out, with potentially catastrophic implications for climate change, the researchers said." 

"A study into the speed at which the permafrost is melting suggests that the tipping point will occur between 2020 and 2030 and will mark the point at which the Arctic turns from being a net ‘sink’ for carbon dioxide into an overall source that will accelerate global warming, they said. . . . ‘Our research shows that the release of carbon from permafrost will result in an irreversible climate tipping point in only 20 years...'

'Once the frozen carbon thaws out and decays, there is no way to put it back into the permafrost,’ [Dr. Kevin Schaefer of the U.S. National Snow and Ice Data Center in Boulder, Colorado] said.” (Steve Connor, Science Editor, “Melting of the Arctic 'will accelerate climate change within 20 years', The Independent, Monday, May 30, 2011 reporting findings in Kevin Schaefer, Tingjun Zhang, Lori Bruhwiler, Andrew P. Barrett. Amount and timing of permafrost carbon release in response to climate warming, Tellus B, (Steve Connor, Science Editor, “Melting of the Arctic 'will accelerate climate change within 20 years', The Independent, Monday, May 30, 2011 reporting findings in Dr. Kevin Schaefer, Tingjun Zhang, Lori Bruhwiler, Andrew P. Barrett. Amount and timing of permafrost carbon release in response to climate warming, Tellus B, 63: 165–180. doi: 10.1111/j.1600-0889.2011.00527.x, Volume 63, Issue 2, pages 165–180, April 2011)

See Methane potency ratings in Table at right.

See “Thawing Permafrost Study” video featuring commentary by Dr. Kevin Schaefer, NSIDC, CERES, February 16, 2011

2025 - Melting Permafrost

2025.  Projected starting point when melting permafrost begins a likely irreversible release of 190 gigatons of greenhouse gases into the atmosphere.  “Thawing permafrost is threatening to overwhelm attempts to keep the planet from getting too hot for human survival.  Without major reductions in the use of fossil fuels, as much as two-thirds of the world's gigantic storehouse of frozen carbon could be released, a new study [Amount and timing of permafrost carbon release in response to climate warming] reported. That would push global temperatures several degrees higher, making large parts of the planet uninhabitable.  Once the Arctic gets warm enough, the carbon and methane emissions from thawing permafrost will kick-start a feedback that will amplify the current warming rate, says Kevin Schaefer, a scientist at the National Snow and Ice Data Center (NSIDC) in Boulder, Colorado."

"That will likely be irreversible.  And we're less than 20 years [2030] from this tipping point.  Schaefer prefers to use the term ‘starting point’ for when the 13 million square kilometres [11.6 million square miles] of permafrost in Alaska, Canada, Siberia and parts of Europe becomes a major new source of carbon emissions.  ‘Our model projects a starting point 15 to 20 years [2025 to 2030] from now ,’ Schaefer told IPS.  The model used a 'middle of the road' scenario with less fossil fuel use than at present. Even at that rate, it found that between 29 and 60 percent of the world's permafrost will thaw, releasing an extra 190 gigatonnes of carbon by 2200.  The study is the first to quantify when and how much carbon will be released and was published this week [February 15, 2011] in the meteorological journal Tellus.”  (Stephen Leahy, “Permafrost Melt Soon Irreversible Without Major Fossil Fuel Cuts,” IPS, Uxbridge, Canada, February 17, 2011 reporting findings in Kevin Schaefer, Tingjun Zhang, Lori Bruhwiler, Andrew P. Barrett, Amount and timing of permafrost carbon release in response to climate warming, Tellus B, 2011; DOI: 10.1111/j.1600-0889.2011.00527.x, article first published online on February 15, 2011)

2025.  Approximate year when more carbon emissions will begin being outgassed from Arctic permafrost than carbon is taken up by the tundra.  “[S]cientists have documented significant melting of the underground permafrost, from Alaska to eastern Siberia.  The rising temperatures [in the Arctic] have lengthened the growing season of the Arctic summer, which has increased plant growth and the consequent uptake of carbon dioxide. However, by around 2025 this will go into reverse and the thawing permafrost will release more carbon than is being taken up by the tundra growing above it, [Dr. Kevin Schaefer of the U.S. National Snow and Ice Data Center in Boulder, Colorado] said."  (Steve Connor, Science Editor, “Melting of the Arctic 'will accelerate climate change within 20 years', The Independent, Monday, May 30, 2011 reporting findings in Kevin Schaefer, Tingjun Zhang, Lori Bruhwiler, Andrew P. Barrett. Amount and timing of permafrost carbon release in response to climate warming, Tellus B, 63: 165–180. doi: 10.1111/j.1600-0889.2011.00527.x, Volume 63, Issue 2, pages 165–180, April 2011)

2030 - Melting Permafrost

2030.  Permafrost melting by 2030 could cause severe damage to Russian defense infrastructure, assets and resources.  “Defense infrastructure, including key airfields, oil storage facilities and strategic oil reservoirs, could all be destroyed if the hard permafrost covering the ground year-round across Russia's far north melts by 2030, Russia's First Deputy Emergencies Minister Ruslan Tsalikov told the Federation Council, the upper chamber of the Russian parliament, Thursday.  Tsalikov described as a catastrophe the damage that would result from widespread permafrost melting, the RIA Novosti news agency reported.  Russia's widespread coniferous forests also could be inundated by flooding and unprecedented warmer weather triggered by climate change, Tsalikov said.  If the annual temperature rises by one or two degrees ... the permafrost could decrease 50 percent, Tsalikov said."

"The risk of flooding would also double, he said, according to the RIA Novosti report.  Global warming could also cost Russia its huge supplies of methane gas trapped beneath the permafrost, believed to be almost one third of the entire world's reserves, RIA Novosti said.  The news agency said West Siberia's permafrost was currently disappearing at the rate of 4 centimeters per year. That would cause the permafrost's southern boundaries to retreat by an average of nearly 50 miles across northern Russia over the next 20 years [2010-2030], the report said.” (Martin Sieff, UPI News Service, “Russia Defense Watch: Melting ice menace,” UPI International Intelligence, June 23, 2008)

2030.  Global warming projected to add as much $6.1 billion in repair and replacement costs to Alaska’s infrastructure by 2030.  “Many of Alaska's roads, runways, railroads and water and sewer systems will wear out more quickly and cost more to repair or replace because of climate change, according to a study released yesterday.  Higher temperatures, melting permafrost, a reduction in polar ice and increased flooding are expected to raise the repair and replacement cost of thousands of infrastructure projects as much as $6.1 billion for a total of nearly $40 billion - about a 20 percent increase - from now to 2030, according to the study, by the Institute for Social and Economic Research at the University of Alaska Anchorage. . . .

The study is the first of its kind in Alaska, and its authors emphasize that it does not project costs for things like moving villages, protecting the Trans-Alaska Pipeline, fighting wildfires or protecting private property that may be affected.  ‘There are a million other issues related to climate change,’ said Peter Larsen, a natural resource economist at the Institute for Social and Economic Research and the lead researcher for the report.” (“Study Sees Climate Change Impact on Alaska,” The New York Times, June 28, 2007 citing findings in Peter Larsen, Principal Investigator, O. Scott Goldsmith, ISER-UAA, Orson Smith, UAA-Engineering, Meghan Wilson, ISER-UAA, Ken Strzepek, U. of Colorado-Engineering, Paul Chinowsky, U. of Colorado-Engineering, and Ben Saylor, ISER-UAA, Estimating Future Costs for Alaska Public Infrastructure At Risk from Climate Change, Institute of Social and Economic Research, University of Alaska Anchorage, June 2007, pp. 1, 7, 69, 74, 81)

Projected Permafrost Distribution, Seward Peninsula, Alaska — Early 21st Century and Late 21st Century
(Yellow=Continuous; Blue=Discontinuous; Red=Thawing Permafrost/Permafrost Free)

Left (Early 21st century).  Right (Late 21st century). Source: Peter Larsen et al, Estimating Future Costs for Alaska Public Infrastructure At Risk from Climate Change, Institute of Social and Economic Research, University of Alaska Anchorage, June 2007, p. 11. Impacts do not include greenhouse gas contributions from CO2 and methane emissions released from melting permafrost. 

2200 - Melting Permafrost

2200.  By 2200 an estimated 190 billion tons of carbon dioxide and methane is projected to have been released into the air due to melting of the Earth’s permafrost.  “The study [Amount and timing of permafrost carbon release in response to climate warming] is the first global investigation of what will happen in a warmer world to the huge amounts of frozen plant matter that has remained undegraded in the soil since it was incorporated into the permafrost about 30,000 years ago.  It also found that by 2200 about two-thirds of the Earth's permafrost will have melted, releasing an estimated 190 billion tons of carbon dioxide and methane into the air – about half of all the fossil fuel emissions of greenhouse gases since the start of the industrial revolution.  ‘Our results indicate that, as the Arctic warms up, this frozen carbon will thaw out, allowing microbial decay to resume and releasing carbon into the atmosphere,’ said Kevin Schaefer of the U.S. National Snow and Ice Data Center in Boulder, Colorado.” (Steve Connor, Science Editor, “Melting of the Arctic 'will accelerate climate change within 20 years', The Independent, Monday, May 30, 2011 reporting findings in Kevin Schaefer, Tingjun Zhang, Lori Bruhwiler, Andrew P. Barrett, Amount and timing of permafrost carbon release in response to climate warming, Tellus B, 2011; DOI: 10.1111/j.1600-0889.2011.00527.x)

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