• shareshare
  • link
  • cite
  • add
auto_awesome_motion View all 3 versions
Research data . Dataset . Other dataset type . 2018

Soil organic carbon (SOC) and sediment contents and fluxes for terrain units along the Yukon Coastal Plain, Canada, including corrections for volumetric ground ice contents

Couture, Nicole; Irrgang, Anna Maria; Pollard, Wayne H; Lantuit, Hugues; Fritz, Michael;
Open Access
Published: 01 Jan 2018
Publisher: PANGAEA

Narrowing uncertainties about carbon cycling is important in the Arctic where rapid environmental changes contribute to enhanced mobilization of carbon. Here we quantify soil organic carbon (SOC) contents of permafrost soils along the Yukon Coastal Plain and determine the annual fluxes from erosion. Different terrain units are assessed based on surficial geology, morphology, and ground ice conditions. To account for the volume of wedge ice and massive ice in a unit, sample SOC contents are reduced by 19% and sediment contents by 16%. The SOC content in a 1 m**2 column of soil varies according to the height of the bluff, ranging from 30 to 662 kg, with a mean value of 183 kg. Forty-four per cent of the SOC is within the top 1 m of soil and values vary based on surficial materials, ranging from 30 to 53 kg C/m**3, with a mean of 41 kg. Eighty per cent of the shoreline is erosive with a mean annual rate of change is 0.7 m/a. This results in a SOC flux per meter of shoreline of 131 kg C/m/a, and a total flux for the entire Yukon coast of 35.5 10**6 kg C/a (0.036 Tg C/a). The mean flux of sediment per meter of shoreline is 5.3 10**3 kg/m/a, with a total flux of 1,832.0 10**6 kg/a (1.832 Tg/a). Sedimentation rates indicate that approximately 13% of the eroded carbon is sequestered in nearshore sediments, where the overwhelming majority of organic carbon is of terrestrial origin.

Supplement to: Couture, Nicole; Irrgang, Anna Maria; Pollard, Wayne H; Lantuit, Hugues; Fritz, Michael (2018): Coastal Erosion of Permafrost Soils Along the Yukon Coastal Plain and Fluxes of Organic Carbon to the Canadian Beaufort Sea. Journal of Geophysical Research: Biogeosciences


eroded, Lithology composition facies, Reference source, organic, Location, Layer thickness, Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III, Area, Density, Corrected, mass density, Change rate, soil, Density, dry bulk, Elementar, Vario EL III, Depth, soil, minimum, maximum, LONGITUDE, total, Density, mass density, minimum, Depth, soil, maximum, Depth, Mass, flux, dry bulk, Lithology/composition/facies, Carbon and nitrogen and sulfur CNS isotope element analyzer, Mass, Ice content, Carbon, flux, Area, eroded, Mass per unit area, Sample ID, Earth System Research, LATITUDE, Carbon, organic, total, Reference/source

Funded by
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
EC| Nunataryuk
Permafrost thaw and the changing arctic coast: science for socio-economic adaptation
  • Funder: European Commission (EC)
  • Project Code: 773421
  • Funding stream: H2020 | RIA