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

Ramage, Justine L.; Irrgang, Anna M.; Morgenstern, Anne; Lantuit, Hugues

doi:https://doi.org/10.5194/bg-15-1483-2018

Articles | Volume 15, issue 5

https://doi.org/10.5194/bg-15-1483-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Changing Permafrost in the Arctic and its Global Effects in...

https://doi.org/10.5194/bg-15-1483-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 5

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, Anna M. Irrgang, Anne Morgenstern, and Hugues Lantuit

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https://doi.org/10.5194/bg-15-1483-2018-supplement

Data sets

Coastal retrogressive thaw slumps along the Yukon Coast (Canada) J. L. Ramage, A. M. Konopczak, U. Herzschuh, A. Morgenstern, N. Couture, and H. Lantuit https://doi.org/10.1594/PANGAEA.869573

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Short summary

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.