Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release
Climate change is increasing the frequency and intensity of thermokarst, and accelerating the delivery of terrestrial organic material from previously sequestered sources to aquatic systems, where it is subject to further biochemical alteration. Rapid climate change in the glacially conditioned ice-...
Published in: | Environmental Research Letters |
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2020
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Online Access: | https://research.vu.nl/en/publications/a228a46c-e57a-4fb3-99ec-6bb13b603e07 https://doi.org/10.1088/1748-9326/abac36 https://hdl.handle.net/1871.1/a228a46c-e57a-4fb3-99ec-6bb13b603e07 http://www.scopus.com/inward/record.url?scp=85094814776&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85094814776&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/a228a46c-e57a-4fb3-99ec-6bb13b603e07 2024-09-15T18:11:31+00:00 Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release Shakil, S. Tank, S. E. Kokelj, S. V. Vonk, J. E. Zolkos, S. 2020-11 https://research.vu.nl/en/publications/a228a46c-e57a-4fb3-99ec-6bb13b603e07 https://doi.org/10.1088/1748-9326/abac36 https://hdl.handle.net/1871.1/a228a46c-e57a-4fb3-99ec-6bb13b603e07 http://www.scopus.com/inward/record.url?scp=85094814776&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85094814776&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/a228a46c-e57a-4fb3-99ec-6bb13b603e07 info:eu-repo/semantics/openAccess Shakil , S , Tank , S E , Kokelj , S V , Vonk , J E & Zolkos , S 2020 , ' Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT : Quantification and implications for stream systems and permafrost carbon release ' , Environmental Research Letters , vol. 15 , no. 11 , 114019 , pp. 1-21 . https://doi.org/10.1088/1748-9326/abac36 Climate change Organic carbon Particulate Permafrost Streams Thermokarst /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2020 ftvuamstcris https://doi.org/10.1088/1748-9326/abac36 2024-08-07T23:47:18Z Climate change is increasing the frequency and intensity of thermokarst, and accelerating the delivery of terrestrial organic material from previously sequestered sources to aquatic systems, where it is subject to further biochemical alteration. Rapid climate change in the glacially conditioned ice-rich and ice-marginal terrain of the Peel Plateau, western Canada, is accelerating thaw-driven mass wasting in the form of retrogressive thaw slumps, which are rapidly increasing in area, volume and thickness of permafrost thawed. Despite major perturbation of downstream sedimentary and geochemical fluxes, few studies have examined changes in flux and composition of particulate organic carbon (POC) in streams and rivers as a result of permafrost thaw. Here we show that the orders of magnitude increase in total organic carbon, nitrogen, and phosphorus mobilized to streams from thaw slumps on the Peel Plateau is almost entirely due to POC and associated particulate nitrogen and phosphorus release. Slump-mobilized POC is compositionally distinct from its dissolved counterpart and appears to contain relatively greater amounts of degraded organic matter, as inferred from base-extracted fluorescence of particulate organic matter. Thus, slump-mobilized POC is potentially more recalcitrant than POC present in non-slump affected stream networks. Furthermore a substantial portion of POC mobilized from thaw slumps will be constrained within primary sediment stores in valley bottoms, where net accumulation is currently exceeding net erosion, resulting in century to millennial scale sequestration of thermokarst-mobilized POC. This study highlights the pressing need for better knowledge of sedimentary cascades, mobilization, and storage reservoirs in slump-affected streams, and baseline assessments of the biodegradability of POC and cycling of particulate nutrients within a sedimentary cascade framework. Explicit incorporation of POC dynamics into our understanding of land-water carbon mobilization in the face of permafrost thaw is ... Article in Journal/Newspaper Ice permafrost Thermokarst Vrije Universiteit Amsterdam (VU): Research Portal Environmental Research Letters 15 11 114019 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Climate change Organic carbon Particulate Permafrost Streams Thermokarst /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
Climate change Organic carbon Particulate Permafrost Streams Thermokarst /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Shakil, S. Tank, S. E. Kokelj, S. V. Vonk, J. E. Zolkos, S. Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release |
topic_facet |
Climate change Organic carbon Particulate Permafrost Streams Thermokarst /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Climate change is increasing the frequency and intensity of thermokarst, and accelerating the delivery of terrestrial organic material from previously sequestered sources to aquatic systems, where it is subject to further biochemical alteration. Rapid climate change in the glacially conditioned ice-rich and ice-marginal terrain of the Peel Plateau, western Canada, is accelerating thaw-driven mass wasting in the form of retrogressive thaw slumps, which are rapidly increasing in area, volume and thickness of permafrost thawed. Despite major perturbation of downstream sedimentary and geochemical fluxes, few studies have examined changes in flux and composition of particulate organic carbon (POC) in streams and rivers as a result of permafrost thaw. Here we show that the orders of magnitude increase in total organic carbon, nitrogen, and phosphorus mobilized to streams from thaw slumps on the Peel Plateau is almost entirely due to POC and associated particulate nitrogen and phosphorus release. Slump-mobilized POC is compositionally distinct from its dissolved counterpart and appears to contain relatively greater amounts of degraded organic matter, as inferred from base-extracted fluorescence of particulate organic matter. Thus, slump-mobilized POC is potentially more recalcitrant than POC present in non-slump affected stream networks. Furthermore a substantial portion of POC mobilized from thaw slumps will be constrained within primary sediment stores in valley bottoms, where net accumulation is currently exceeding net erosion, resulting in century to millennial scale sequestration of thermokarst-mobilized POC. This study highlights the pressing need for better knowledge of sedimentary cascades, mobilization, and storage reservoirs in slump-affected streams, and baseline assessments of the biodegradability of POC and cycling of particulate nutrients within a sedimentary cascade framework. Explicit incorporation of POC dynamics into our understanding of land-water carbon mobilization in the face of permafrost thaw is ... |
format |
Article in Journal/Newspaper |
author |
Shakil, S. Tank, S. E. Kokelj, S. V. Vonk, J. E. Zolkos, S. |
author_facet |
Shakil, S. Tank, S. E. Kokelj, S. V. Vonk, J. E. Zolkos, S. |
author_sort |
Shakil, S. |
title |
Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release |
title_short |
Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release |
title_full |
Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release |
title_fullStr |
Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release |
title_full_unstemmed |
Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT:Quantification and implications for stream systems and permafrost carbon release |
title_sort |
particulate dominance of organic carbon mobilization from thaw slumps on the peel plateau, nt:quantification and implications for stream systems and permafrost carbon release |
publishDate |
2020 |
url |
https://research.vu.nl/en/publications/a228a46c-e57a-4fb3-99ec-6bb13b603e07 https://doi.org/10.1088/1748-9326/abac36 https://hdl.handle.net/1871.1/a228a46c-e57a-4fb3-99ec-6bb13b603e07 http://www.scopus.com/inward/record.url?scp=85094814776&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85094814776&partnerID=8YFLogxK |
genre |
Ice permafrost Thermokarst |
genre_facet |
Ice permafrost Thermokarst |
op_source |
Shakil , S , Tank , S E , Kokelj , S V , Vonk , J E & Zolkos , S 2020 , ' Particulate dominance of organic carbon mobilization from thaw slumps on the Peel Plateau, NT : Quantification and implications for stream systems and permafrost carbon release ' , Environmental Research Letters , vol. 15 , no. 11 , 114019 , pp. 1-21 . https://doi.org/10.1088/1748-9326/abac36 |
op_relation |
https://research.vu.nl/en/publications/a228a46c-e57a-4fb3-99ec-6bb13b603e07 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1088/1748-9326/abac36 |
container_title |
Environmental Research Letters |
container_volume |
15 |
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11 |
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114019 |
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1810449111939284992 |