publication . Article . Other literature type . 2017

Limited contribution of permafrost carbon to methane release from thawing peatlands

Mark D. A. Cooper; Cristian Estop-Aragonés; James P. Fisher; Aaron Thierry; Mark H. Garnett; Dan J. Charman; Julian B. Murton; Gareth K. Phoenix; Rachael Treharne; Steve V. Kokelj; ...
Open Access English
  • Published: 26 Jun 2017
  • Publisher: Nature Publishing Group
Abstract
Models predict that thaw of permafrost soils at northern high latitudes will release tens of billions of tonnes of carbon (C) to the atmosphere by 2100 (refs 1,2,3). The effect on the Earth’s climate depends strongly on the proportion of this C that is released as the more powerful greenhouse gas methane (CH4), rather than carbon dioxide (CO2) (refs 1,4); even if CH4 emissions represent just 2% of the C release, they would contribute approximately one-quarter of the climate forcing5. In northern peatlands, thaw of ice-rich permafrost causes surface subsidence (thermokarst) and water-logging6, exposing substantial stores (tens of kilograms of C per square meter, ...
Subjects
free text keywords: Permafrost carbon cycle, Environmental chemistry, Carbon, chemistry.chemical_element, chemistry, Methane, chemistry.chemical_compound, Biology, Biogeochemistry, Peat, Soil science, Flux (metallurgy), Permafrost, Climatology, Vegetation

600 800 1000 1200 1400 1600 1800 Age of CH4 derived from previously-frozen C (Page in Equation 1)

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