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Couture, Nicole; Irrgang, Anna Maria; Pollard, Wayne H; Lantuit, Hugues; Fritz, Michael (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. PANGAEA,, Supplement to: Couture, N et al. (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,

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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.
Related to:
Bockheim, James G; Everett, L R; Hinkel, Kenneth M; Brown, J; Nelson, F E (1999): Soil Organic Carbon Storage and Distribution in Arctic Tundra, Barrow, Alaska. Soil Science Society of America Journal, 63(4), 934,
Bockheim, James G; Walker, Donald A; Everett, L R (1998): Soil carbon distribution in nonacidic and acidic tundra of arctic Alaska. In R. Lal, J.M. Kimble, R.F. Follett, B.A. Stewart (Eds.), Soil processes and the carbon cycle, Boca Raton, FL: CRC Press, 143-155 pp
Couture, Nicole; Irrgang, Anna Maria; Pollard, Wayne H; Lantuit, Hugues; Fritz, Michael (2019): Marine Sediment data along the Yukon Coastal Plain, Canada. PANGAEA,
Gonzáles-Rojí, Santos J; Saenz, Jon; Ibarra-Berastegi, Gabriel; Díaz de Argandoña, Javier (2018): Moisture Balance Over the Iberian Peninsula According to a Regional Climate Model: The Impact of 3DVAR Data Assimilation. Journal of Geophysical Research: Atmospheres, 123(2), 708-729,
Harry, D G; French, H M; Pollard, Wayne H (1988): Massive ground ice and ice-cored terrain near Sabine Point, Yukon Coastal Plain. Canadian Journal of Earth Sciences, 25(11), 1846-1856,
Lee, Steven; Ford, Amanda; Mangubhai, Sangeeta; Wild, Christian; Ferse, Sebastian C A (2018): Effects of sandfish (Holothuria scabra) removal on shallow-water sediments in Fiji. PeerJ, 6, e4773,
Michaelson, G J; Ping, Chien-Lu; Kimble, John M (1996): Carbon storage and distribution in tundra soils of arctic Alaska. U.S.A. Arctic and Alpine Research, 28, 414-424
Rampton, V N (1982): Quaternary geology of the Yukon Coastal Plain. Geological Survey of Canada Bulletin, 317, 1-49
Smith, CA; Kennedy, C; Hargrave, A E; McKenna, K M (1989): Soil and vegetation of Herschel Island. Agriculture Canada, Research Branch
Westerhold, Thomas; Röhl, Ursula; Donner, Barbara; Frederichs, Thomas; Kordesch, Wendy E C; Bohaty, Steven M; Hodell, David A; Laskar, Jacques; Zeebe, Richard E (2018): Late Lutetian thermal maximum-crossing a thermal threshold in earth's climate system? Geochemistry, Geophysics, Geosystems, 19(1), 73-82,
Median Latitude: 69.469912 * Median Longitude: -139.072632 * South-bound Latitude: 68.980000 * West-bound Longitude: -140.510000 * North-bound Latitude: 69.630000 * East-bound Longitude: -137.390000
Yukon_Coastal_Soils * Latitude: 69.290000 * Longitude: -138.990000 * Location: Yukon, Canada, North America
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1LocationLocationCouture, Nicole
2Sample IDSample IDCouture, Nicole
3LATITUDELatitudeCouture, NicoleGeocode
4LONGITUDELongitudeCouture, NicoleGeocode
5Layer thicknessThicknessmCouture, NicoleActive layer thickness
6Depth, soil, minimumDepth soil minmCouture, NicoleDepth to top of soil layer
7Depth, soil, maximumDepth soil maxmCouture, NicoleDepth to bottom of soil layer
8Lithology/composition/faciesLithologyCouture, Nicole
9Carbon, organic, totalTOC%Couture, NicoleElement analyser CNS, Elementar Vario EL IIIPercent weight
10Reference/sourceReferenceCouture, NicoleOrganic carbon source
11Density, dry bulkDBDg/cm3Couture, Nicole
12Reference/sourceReferenceCouture, NicoleBulk density source
13Mass per unit areaMass/areakg/m2Couture, NicoleMass of soil organic carbon in layer
14Mass per unit areaMass/areakg/m2Couture, NicoleMass of sediment in layer
15Density, mass densityDensitykg/m3Couture, NicoleCarbon density in top metre of soil, top 1 m
16Density, mass densityDensitykg/m3Couture, NicoleMean carbon density in bluff, mean
17Ice contentIce%Couture, NicoleMassive ground ice volumetric in layer (MI)
18Ice contentIce%Couture, NicoleWedge ice volumetric in layer (WI)
19Ice contentIce%Couture, NicoleMassive ice plus wedge ice in layer (MI+WI)
20Mass per unit areaMass/areakg/m2Couture, NicoleCorrectedSOC corrected for ground ice (MC corr.)
21Mass per unit areaMass/areakg/m2Couture, NicoleCorrectedSediment corrected for ground ice (MS corr.)
22Mass per unit areaMass/areakg/m2Couture, NicoleTotal SOC in bluff (MC total)
23Mass per unit areaMass/areakg/m2Couture, NicoleTotal sediment in bluff (MS total)
24Change rateChange ratem/aCouture, Nicole
25Area, erodedArea erodm2/aCouture, Nicole
26Mass, fluxMass fluxkg/aCouture, NicoleSOC flux from soil layer (MC flux layer)
27Mass, fluxMass fluxkg/aCouture, NicoleTotal SOC flux from terrain unit (MC flux total)
28Mass, fluxMass fluxkg/aCouture, NicoleSediment flux from soil layer (MS flux layer)
29Mass, fluxMass fluxkg/aCouture, NicoleTotal sediment flux from terrain unit (MS flux total)
30Mass, fluxMass fluxkg/aCouture, NicoleSOC flux per metre of coast (MC flux per meter)
31Mass, fluxMass fluxkg/aCouture, NicoleSediment flux per metre of coast (MS flux per meter)
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