Articles | Volume 15, issue 5
Biogeosciences, 15, 1483–1495, 2018
https://doi.org/10.5194/bg-15-1483-2018

Special issue: Changing Permafrost in the Arctic and its Global Effects in...

Biogeosciences, 15, 1483–1495, 2018
https://doi.org/10.5194/bg-15-1483-2018
Research article
13 Mar 2018
Research article | 13 Mar 2018

Increasing coastal slump activity impacts the release of sediment and organic carbon into the Arctic Ocean

Justine L. Ramage et al.

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Cited articles

Abbott, B. W. and Jones, J. B.: Permafrost collapse alters soil carbon stocks, respiration, CH4, and N2O in upland tundra, Glob. Change Biol., 21, 4570–4587, 2015. 
Abbott, B. W., Jones, J. B., Schuur, E. A. G., Chapin III, F. S., Bowden, W. B., Bret-Harte, M. S., et al.: Biomass offsets little or none of permafrost carbon release from soils, streams, and wildfire: an expert assessment, Environ. Res. Lett., 11, 034014, https://doi.org/10.1088/1748-9326/11/3/034014, 2016. 
Are, F. E.: The role of coastal retreat for sedimentation in the Laptev Sea, in: Land-Ocean Systems in the Siberian Arctic, 288–295, Springer Berlin Heidelberg, 1999. 
Are, F. E., Reimnitz, E., Grigoriev, M., Hubberten, H.-W., and Rachold, V.: The Influence of Cryogenic Processes on the Erosional Arctic Shoreface, J. Coast. Res., 241, 110–121, https://doi.org/10.2112/05-0573.1, 2008. 
Brooker, A., Fraser, R. H., Olthof, I., Kokelj, S. V., and Lacelle, D.: Mapping the activity and evolution of retrogressive thaw slumps by tasselled cap trend analysis of a Landsat satellite image stack, Permafrost Periglac., 25, 243–256, 2014. 
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We describe the evolution of thaw slumps between 1952 and 2011 along the Yukon Coast, Canada, and calculate the contribution of the slumps to the carbon budget in this area. The number of slumps has increased by 73 % over the period. These slumps displaced more than 16 billion m3 of material and mobilized 146 t of carbon. This represents 0.6 % of the annual carbon flux released from shoreline retreat, which shows that the contribution of slumps to the nearshore carbon budget is non-negligible.
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