Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient
Black carbon (BC) plays an important role in carbon burial in marine sediments globally. Yet the sequestration of BC in the Arctic Ocean is poorly understood. Here we assess the concentrations, fluxes, and sources of soot BC (SBC)—the most refractory component of BC—in sediments from the East Siberi...
Published in: | Global Biogeochemical Cycles |
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2017
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Online Access: | https://research.vu.nl/en/publications/e8a2afc0-a80d-432f-8565-973192a78a4b https://doi.org/10.1002/2017GB005693 https://hdl.handle.net/1871.1/e8a2afc0-a80d-432f-8565-973192a78a4b http://www.scopus.com/inward/record.url?scp=85031747487&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85031747487&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/e8a2afc0-a80d-432f-8565-973192a78a4b 2024-05-19T07:33:13+00:00 Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient Salvadó, Joan A. Bröder, Lisa Andersson, August Semiletov, Igor P. Gustafsson, Örjan 2017-10-01 https://research.vu.nl/en/publications/e8a2afc0-a80d-432f-8565-973192a78a4b https://doi.org/10.1002/2017GB005693 https://hdl.handle.net/1871.1/e8a2afc0-a80d-432f-8565-973192a78a4b http://www.scopus.com/inward/record.url?scp=85031747487&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85031747487&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/e8a2afc0-a80d-432f-8565-973192a78a4b info:eu-repo/semantics/closedAccess Salvadó , J A , Bröder , L , Andersson , A , Semiletov , I P & Gustafsson , Ö 2017 , ' Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient ' , Global Biogeochemical Cycles , vol. 31 , no. 10 , pp. 1501-1515 . https://doi.org/10.1002/2017GB005693 Arctic Ocean black carbon permafrost /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2017 ftvuamstcris https://doi.org/10.1002/2017GB005693 2024-04-23T02:57:51Z Black carbon (BC) plays an important role in carbon burial in marine sediments globally. Yet the sequestration of BC in the Arctic Ocean is poorly understood. Here we assess the concentrations, fluxes, and sources of soot BC (SBC)—the most refractory component of BC—in sediments from the East Siberian Arctic Shelf (ESAS), the World's largest shelf sea system. SBC concentrations in the contemporary shelf sediments range from 0.1 to 2.1 mg g −1 dw, corresponding to 2–12% of total organic carbon. The 210 Pb-derived fluxes of SBC (0.42–11 g m −2 yr −1 ) are higher or in the same range as fluxes reported for marine surface sediments closer to anthropogenic emissions. The total burial flux of SBC in the ESAS (~4,000 Gg yr −1 ) illustrates the great importance of this Arctic shelf in marine sequestration of SBC. The radiocarbon signal of the SBC shows more depleted yet also more uniform signatures (−721 to −896‰; average of −774 ± 62‰) than of the non-SBC pool (−304 to −728‰; average of −491 ± 163‰), suggesting that SBC is coming from an, on average, 5,900 ± 300 years older and more specific source than the non-SBC pool. We estimate that the atmospheric BC input to the ESAS is negligible (~0.6% of the SBC burial flux). Statistical source apportionment modeling suggests that the ESAS sedimentary SBC is remobilized by thawing of two permafrost carbon (PF/C) systems: surface soil permafrost (topsoil/PF; 25 ± 8%) and Pleistocene ice complex deposits (ICD/PF; 75 ± 8%). The SBC contribution to the total mobilized permafrost carbon (PF/C) increases with increasing distance from the coast (from 5 to 14%), indicating that the SBC is more recalcitrant than other forms of translocated PF/C. These results elucidate for the first time the key role of permafrost thaw in the transport of SBC to the Arctic Ocean. With ongoing global warming, these findings have implications for the biogeochemical carbon cycle, increasing the size of this refractory carbon pool in the Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Arctic Ocean black carbon Global warming Ice permafrost Vrije Universiteit Amsterdam (VU): Research Portal Global Biogeochemical Cycles 31 10 1501 1515 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Arctic Ocean black carbon permafrost /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Arctic Ocean black carbon permafrost /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Salvadó, Joan A. Bröder, Lisa Andersson, August Semiletov, Igor P. Gustafsson, Örjan Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient |
topic_facet |
Arctic Ocean black carbon permafrost /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Black carbon (BC) plays an important role in carbon burial in marine sediments globally. Yet the sequestration of BC in the Arctic Ocean is poorly understood. Here we assess the concentrations, fluxes, and sources of soot BC (SBC)—the most refractory component of BC—in sediments from the East Siberian Arctic Shelf (ESAS), the World's largest shelf sea system. SBC concentrations in the contemporary shelf sediments range from 0.1 to 2.1 mg g −1 dw, corresponding to 2–12% of total organic carbon. The 210 Pb-derived fluxes of SBC (0.42–11 g m −2 yr −1 ) are higher or in the same range as fluxes reported for marine surface sediments closer to anthropogenic emissions. The total burial flux of SBC in the ESAS (~4,000 Gg yr −1 ) illustrates the great importance of this Arctic shelf in marine sequestration of SBC. The radiocarbon signal of the SBC shows more depleted yet also more uniform signatures (−721 to −896‰; average of −774 ± 62‰) than of the non-SBC pool (−304 to −728‰; average of −491 ± 163‰), suggesting that SBC is coming from an, on average, 5,900 ± 300 years older and more specific source than the non-SBC pool. We estimate that the atmospheric BC input to the ESAS is negligible (~0.6% of the SBC burial flux). Statistical source apportionment modeling suggests that the ESAS sedimentary SBC is remobilized by thawing of two permafrost carbon (PF/C) systems: surface soil permafrost (topsoil/PF; 25 ± 8%) and Pleistocene ice complex deposits (ICD/PF; 75 ± 8%). The SBC contribution to the total mobilized permafrost carbon (PF/C) increases with increasing distance from the coast (from 5 to 14%), indicating that the SBC is more recalcitrant than other forms of translocated PF/C. These results elucidate for the first time the key role of permafrost thaw in the transport of SBC to the Arctic Ocean. With ongoing global warming, these findings have implications for the biogeochemical carbon cycle, increasing the size of this refractory carbon pool in the Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
Salvadó, Joan A. Bröder, Lisa Andersson, August Semiletov, Igor P. Gustafsson, Örjan |
author_facet |
Salvadó, Joan A. Bröder, Lisa Andersson, August Semiletov, Igor P. Gustafsson, Örjan |
author_sort |
Salvadó, Joan A. |
title |
Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient |
title_short |
Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient |
title_full |
Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient |
title_fullStr |
Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient |
title_full_unstemmed |
Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient |
title_sort |
release of black carbon from thawing permafrost estimated by sequestration fluxes in the east siberian arctic shelf recipient |
publishDate |
2017 |
url |
https://research.vu.nl/en/publications/e8a2afc0-a80d-432f-8565-973192a78a4b https://doi.org/10.1002/2017GB005693 https://hdl.handle.net/1871.1/e8a2afc0-a80d-432f-8565-973192a78a4b http://www.scopus.com/inward/record.url?scp=85031747487&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85031747487&partnerID=8YFLogxK |
genre |
Arctic Arctic Arctic Ocean black carbon Global warming Ice permafrost |
genre_facet |
Arctic Arctic Arctic Ocean black carbon Global warming Ice permafrost |
op_source |
Salvadó , J A , Bröder , L , Andersson , A , Semiletov , I P & Gustafsson , Ö 2017 , ' Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient ' , Global Biogeochemical Cycles , vol. 31 , no. 10 , pp. 1501-1515 . https://doi.org/10.1002/2017GB005693 |
op_relation |
https://research.vu.nl/en/publications/e8a2afc0-a80d-432f-8565-973192a78a4b |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/2017GB005693 |
container_title |
Global Biogeochemical Cycles |
container_volume |
31 |
container_issue |
10 |
container_start_page |
1501 |
op_container_end_page |
1515 |
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1799471311577153536 |