Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada)
<jats:title>Abstract</jats:title><jats:p>Erosion of permafrost coasts due to climate warming releases large quantities of organic carbon (OC) into the Arctic Ocean. While burial of permafrost OC in marine sediments potentially limits degradation, resuspension of sediments in the ne...
Published in: | Journal of Geophysical Research: Biogeosciences |
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American Geophysical Union (AGU)
2024
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Online Access: | https://epic.awi.de/id/eprint/58255/ https://epic.awi.de/id/eprint/58255/1/JGR%20Biogeosciences%20-%202024%20-%20Jong%20-%20Selective%20Sorting%20and%20Degradation%20of%20Permafrost%20Organic%20Matter%20in%20the%20Nearshore%20Zone%20of.pdf https://doi.org/10.1029/2023jg007479 https://hdl.handle.net/10013/epic.e7a066dc-a640-4da8-8d04-3299d93ec0f6 |
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ftawi:oai:epic.awi.de:58255 2024-02-27T08:38:20+00:00 Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) Jong, Dirk Bröder, Lisa Tesi, Tommaso Tanski, George Oudenhuijsen, Mickolai Fritz, Michael Lantuit, Hugues Haghipour, Negar Eglinton, Timothy Vonk, Jorien 2024-01-01 application/pdf https://epic.awi.de/id/eprint/58255/ https://epic.awi.de/id/eprint/58255/1/JGR%20Biogeosciences%20-%202024%20-%20Jong%20-%20Selective%20Sorting%20and%20Degradation%20of%20Permafrost%20Organic%20Matter%20in%20the%20Nearshore%20Zone%20of.pdf https://doi.org/10.1029/2023jg007479 https://hdl.handle.net/10013/epic.e7a066dc-a640-4da8-8d04-3299d93ec0f6 unknown American Geophysical Union (AGU) https://epic.awi.de/id/eprint/58255/1/JGR%20Biogeosciences%20-%202024%20-%20Jong%20-%20Selective%20Sorting%20and%20Degradation%20of%20Permafrost%20Organic%20Matter%20in%20the%20Nearshore%20Zone%20of.pdf Jong, D. , Bröder, L. , Tesi, T. , Tanski, G. , Oudenhuijsen, M. , Fritz, M. orcid:0000-0003-4591-7325 , Lantuit, H. orcid:0000-0003-1497-6760 , Haghipour, N. , Eglinton, T. and Vonk, J. (2024) Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) , Journal of Geophysical Research Biogeosciences, 129 (1) . doi:10.1029/2023jg007479 <https://doi.org/10.1029/2023jg007479> , hdl:10013/epic.e7a066dc-a640-4da8-8d04-3299d93ec0f6 EPIC3Journal of Geophysical Research Biogeosciences, American Geophysical Union (AGU), 129(1), ISSN: 2169-8953 Article peerRev 2024 ftawi https://doi.org/10.1029/2023jg007479 2024-01-29T00:23:10Z <jats:title>Abstract</jats:title><jats:p>Erosion of permafrost coasts due to climate warming releases large quantities of organic carbon (OC) into the Arctic Ocean. While burial of permafrost OC in marine sediments potentially limits degradation, resuspension of sediments in the nearshore zone potentially enhances degradation and greenhouse gas production, adding to the “permafrost carbon feedback.” Recent studies, focusing on bulk sediments, suggest that permafrost OC derived from coastal erosion is predominantly deposited close to shore. However, bulk approaches disregard sorting processes in the coastal zone, which strongly influence the OC distribution and fate. We studied soils and sediments along a transect from the fast‐eroding shoreline of Herschel Island—<jats:italic>Qikiqtaruk</jats:italic> (Yukon, Canada) to a depositional basin offshore. Sample material was fractionated by density (1.8 g cm<jats:sup>−3</jats:sup>) and size (63 μm), separating loose OC from mineral‐associated OC. Each fraction was analyzed for element content (TOC, TN), carbon isotopes (δ<jats:sup>13</jats:sup>C, Δ<jats:sup>14</jats:sup>C), molecular biomarkers (<jats:italic>n</jats:italic>‐alkanes, <jats:italic>n</jats:italic>‐alkanoic acids, lignin phenols, cutin acids), and mineral surface area. The OC partitioning between fractions changes considerably along the transect, highlighting the importance of hydrodynamic sorting in the nearshore zone. Additionally, OC and biomarker loadings decrease along the land‐ocean transect, indicating significant loss of OC during transport. However, molecular proxies for degradation show contrasting trends, suggesting that OC losses are not always well reflected in its degradation state. This study, using fraction partitioning that crosses land‐ocean boundaries in a way not done before, aids to disentangle sorting processes from degradation patterns, and provides quantitative insight into losses of thawed ... Article in Journal/Newspaper Arctic Arctic Ocean Herschel Herschel Island permafrost Yukon Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Canada Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Yukon Journal of Geophysical Research: Biogeosciences 129 1 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
<jats:title>Abstract</jats:title><jats:p>Erosion of permafrost coasts due to climate warming releases large quantities of organic carbon (OC) into the Arctic Ocean. While burial of permafrost OC in marine sediments potentially limits degradation, resuspension of sediments in the nearshore zone potentially enhances degradation and greenhouse gas production, adding to the “permafrost carbon feedback.” Recent studies, focusing on bulk sediments, suggest that permafrost OC derived from coastal erosion is predominantly deposited close to shore. However, bulk approaches disregard sorting processes in the coastal zone, which strongly influence the OC distribution and fate. We studied soils and sediments along a transect from the fast‐eroding shoreline of Herschel Island—<jats:italic>Qikiqtaruk</jats:italic> (Yukon, Canada) to a depositional basin offshore. Sample material was fractionated by density (1.8 g cm<jats:sup>−3</jats:sup>) and size (63 μm), separating loose OC from mineral‐associated OC. Each fraction was analyzed for element content (TOC, TN), carbon isotopes (δ<jats:sup>13</jats:sup>C, Δ<jats:sup>14</jats:sup>C), molecular biomarkers (<jats:italic>n</jats:italic>‐alkanes, <jats:italic>n</jats:italic>‐alkanoic acids, lignin phenols, cutin acids), and mineral surface area. The OC partitioning between fractions changes considerably along the transect, highlighting the importance of hydrodynamic sorting in the nearshore zone. Additionally, OC and biomarker loadings decrease along the land‐ocean transect, indicating significant loss of OC during transport. However, molecular proxies for degradation show contrasting trends, suggesting that OC losses are not always well reflected in its degradation state. This study, using fraction partitioning that crosses land‐ocean boundaries in a way not done before, aids to disentangle sorting processes from degradation patterns, and provides quantitative insight into losses of thawed ... |
format |
Article in Journal/Newspaper |
author |
Jong, Dirk Bröder, Lisa Tesi, Tommaso Tanski, George Oudenhuijsen, Mickolai Fritz, Michael Lantuit, Hugues Haghipour, Negar Eglinton, Timothy Vonk, Jorien |
spellingShingle |
Jong, Dirk Bröder, Lisa Tesi, Tommaso Tanski, George Oudenhuijsen, Mickolai Fritz, Michael Lantuit, Hugues Haghipour, Negar Eglinton, Timothy Vonk, Jorien Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) |
author_facet |
Jong, Dirk Bröder, Lisa Tesi, Tommaso Tanski, George Oudenhuijsen, Mickolai Fritz, Michael Lantuit, Hugues Haghipour, Negar Eglinton, Timothy Vonk, Jorien |
author_sort |
Jong, Dirk |
title |
Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) |
title_short |
Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) |
title_full |
Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) |
title_fullStr |
Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) |
title_full_unstemmed |
Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) |
title_sort |
selective sorting and degradation of permafrost organic matter in the nearshore zone of herschel island (yukon, canada) |
publisher |
American Geophysical Union (AGU) |
publishDate |
2024 |
url |
https://epic.awi.de/id/eprint/58255/ https://epic.awi.de/id/eprint/58255/1/JGR%20Biogeosciences%20-%202024%20-%20Jong%20-%20Selective%20Sorting%20and%20Degradation%20of%20Permafrost%20Organic%20Matter%20in%20the%20Nearshore%20Zone%20of.pdf https://doi.org/10.1029/2023jg007479 https://hdl.handle.net/10013/epic.e7a066dc-a640-4da8-8d04-3299d93ec0f6 |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Arctic Ocean Canada Herschel Island Yukon |
geographic_facet |
Arctic Arctic Ocean Canada Herschel Island Yukon |
genre |
Arctic Arctic Ocean Herschel Herschel Island permafrost Yukon |
genre_facet |
Arctic Arctic Ocean Herschel Herschel Island permafrost Yukon |
op_source |
EPIC3Journal of Geophysical Research Biogeosciences, American Geophysical Union (AGU), 129(1), ISSN: 2169-8953 |
op_relation |
https://epic.awi.de/id/eprint/58255/1/JGR%20Biogeosciences%20-%202024%20-%20Jong%20-%20Selective%20Sorting%20and%20Degradation%20of%20Permafrost%20Organic%20Matter%20in%20the%20Nearshore%20Zone%20of.pdf Jong, D. , Bröder, L. , Tesi, T. , Tanski, G. , Oudenhuijsen, M. , Fritz, M. orcid:0000-0003-4591-7325 , Lantuit, H. orcid:0000-0003-1497-6760 , Haghipour, N. , Eglinton, T. and Vonk, J. (2024) Selective Sorting and Degradation of Permafrost Organic Matter in the Nearshore Zone of Herschel Island (Yukon, Canada) , Journal of Geophysical Research Biogeosciences, 129 (1) . doi:10.1029/2023jg007479 <https://doi.org/10.1029/2023jg007479> , hdl:10013/epic.e7a066dc-a640-4da8-8d04-3299d93ec0f6 |
op_doi |
https://doi.org/10.1029/2023jg007479 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
129 |
container_issue |
1 |
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1792045235493142528 |