UNEP report urges policymakers to account for thawing permafrost in climate projections
NSIDC research scientist Kevin Schaefer (left) is lead author in a U.N. Environmental Program (UNEP) report that highlights the impact of permafrost carbon feedback on global climate. The Lena River delta in Siberia (right) is an example of permafrost and shows polygons formed by the intersection of ice wedges. —Credit: Schaefer's photo by Natasha Vizcarra courtesy NSIDC, polygon photo by Konstanze Piel courtesy Alfred Wegener Institute.)
This is a press release from the National Snow and Ice Data Center (NSIDC), which is part of the Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder.
The United Nations Environment Program (UNEP) has released a report recommending the Intergovernmental Panel on Climate Change (IPCC) assess the impact of permafrost carbon dioxide and methane emissions in the negotiation of emissions targets and global climate change policy discussions.
The report recommends that the IPCC compile a special assessment report on permafrost. It also recommends that nations with extensive permafrost create national monitoring networks and make plans to mitigate the risks of thawing permafrost. These nations include Russia, Canada, China, and the United States.
"The infrastructure we have now is not adequate to monitor future changes in permafrost," said lead author Kevin Schaefer, a research scientist at the National Snow and Ice Data Center (NSIDC). "We need to greatly expand our current networks to monitor permafrost, which requires direct investment of money and resources by individual countries."
"Individual nations need to evaluate the risks of thawing permafrost and make plans to protect communities in the most vulnerable regions," Schaefer said. Homes, businesses, and other infrastructure in the far north were built on ground that stayed frozen, and may collapse if this ground thaws.
Permafrost is ground that stays frozen for at least two years in a row and occurs in about a quarter of the land surface in the Northern Hemisphere. The report, titled Policy Implications of Warming Permafrost, said Earth's permafrost contains 1,700 gigatons of carbon as frozen organic matter, twice that currently in the atmosphere. If this organic matter thaws and begins to decay, the resulting carbon dioxide and methane emissions will amplify global warming.
"The release of carbon dioxide and methane from warming permafrost is irreversible: once the organic matter thaws and decays away, there is no way to put it back into the permafrost," Schaefer said.
"Anthropogenic emissions targets in the climate change treaty need to account for these emissions or we risk overshooting the 2 degrees Celsius maximum warming target," he added.
Targets for anthropogenic emissions in the proposed U.N. climate change treaty limit warming to below 2 degrees Celsius above pre-industrial temperatures by 2100, placing an overall limit on total global carbon emissions.
However, the potential hazards of carbon dioxide and methane emissions from warming permafrost are not included in current climate-prediction models.
"This report seeks to communicate to climate treaty negotiators, policy makers, and the general public the implications of continuing to ignore the challenges of warming permafrost," said U.N. Under-Secretary General and UNEP Executive Director Achim Steiner.
"Permafrost is one of the keys to the planet's future because it contains large stores of frozen organic matter that, if thawed and released into the atmosphere, would amplify current global warming and propel us to a warmer world," he said.
"Its potential impact on the climate, ecosystems, and infrastructure has been neglected for too long," Steiner added.
According to the report, Arctic and alpine air temperatures are expected to increase at roughly twice the global rate, and climate projections indicate substantial loss of permafrost by 2100. A global temperature increase of 3 degrees Celsius means a 6 degrees Celsius increase in the Arctic, resulting in an irreversible loss of anywhere between 30 to 85 percent of near-surface permafrost.
Warming permafrost could emit 43 to 135 gigatons of carbon dioxide equivalent by 2100 and 246 to 415 gigatons by 2200. Emissions could start within the next few decades and continue for several centuries, the report said.
"Permafrost emissions could ultimately account for up to 39 percent of total emissions," Schaefer said. "This must be factored in to treaty negotiations expected to replace the Kyoto Protocol."
The Kyoto Protocol set binding targets for industrialized countries and the European community for reducing greenhouse gas (GHG) emissions beginning 2005. While the U.N. climate change treaty encourages industrialized countries to limit GHG emissions, the Kyoto Protocol commits them to do so. Industrialized countries are expected to recommit to the next phase of the Kyoto Protocol in 2013.
Schaefer's co-authors include Hugues Lantuit of the Alfred Wegener Institute (AWI) for Polar and Marine Research in Potsdam, Germany; Vladimir E. Romanovsky of the University of Alaska Fairbanks in the United States; Edward A.G. Schuur of the University of Florida in the United States; and Isabelle Gärtner-Roer of the University of Zürich in Switzerland.
NSIDC scientist Kevin Schaefer (left) and his field research team drill permafrost cores at Prudhoe Bay, on Alaska's North Slope. —Credit: Photo by Tingjun Zhang courtesy NSIDC
Information and graphics
Download the UNEP report at http://www.unep.org/pdf/permafrost.pdf
Download images and figures featured in the report at ftp://sidads.colorado.edu/pub/ppp/graphics/2012_permafrost_unep
See the UNEP Press Release at http://www.unep.org/newscentre
For more information and high-resolution photos of permafrost and frozen ground, see: http://nsidc.org/cryosphere/frozenground
For more in formation about Kevin Schaefer's research, see http://nsidc.org/research/bios/schaefer.html