Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ...
Collapse of permafrost coasts delivers large quantities of particulate organic carbon (POC) to Arctic coastal areas. With rapidly changing environmental conditions, sediment and organic carbon (OC) mobilization and transport pathways are also changing. Here, we assess the sources and sinks of POC in...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000432180 http://hdl.handle.net/20.500.11850/432180 |
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ftdatacite:10.3929/ethz-b-000432180 2024-04-28T08:10:25+00:00 Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ... Jong, Dirk Bröder, Lisa Tanski, George Fritz, Michael Lantuit, Hugues Tesi, Tommaso Haghipour, Negar Eglinton, Timothy I. Vonk, Jorien E. 2020 application/pdf https://dx.doi.org/10.3929/ethz-b-000432180 http://hdl.handle.net/20.500.11850/432180 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 article-journal Text ScholarlyArticle Journal Article 2020 ftdatacite https://doi.org/10.3929/ethz-b-000432180 2024-04-02T12:34:54Z Collapse of permafrost coasts delivers large quantities of particulate organic carbon (POC) to Arctic coastal areas. With rapidly changing environmental conditions, sediment and organic carbon (OC) mobilization and transport pathways are also changing. Here, we assess the sources and sinks of POC in the highly dynamic nearshore zone of Herschel Island‐Qikiqtaruk (Yukon, Canada). Our results show that POC concentrations sharply decrease, from 15.9 to 0.3 mg L−1, within the first 100–300 m offshore. Simultaneously, radiocarbon ages of POC drop from 16,400 to 3,600 14C years, indicating rapid settling of old permafrost POC to underlying sediments. This suggests that permafrost OC is, apart from a very narrow resuspension zone (<5 m water depth), predominantly deposited in nearshore sediments. While long‐term storage of permafrost OC in marine sediments potentially limits biodegradation and its subsequent release as greenhouse gas, resuspension of fine‐grained, OC‐rich sediments in the nearshore zone ... : Geophysical Research Letters, 47 (15) ... Article in Journal/Newspaper Arctic Herschel Herschel Island permafrost Yukon DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
Collapse of permafrost coasts delivers large quantities of particulate organic carbon (POC) to Arctic coastal areas. With rapidly changing environmental conditions, sediment and organic carbon (OC) mobilization and transport pathways are also changing. Here, we assess the sources and sinks of POC in the highly dynamic nearshore zone of Herschel Island‐Qikiqtaruk (Yukon, Canada). Our results show that POC concentrations sharply decrease, from 15.9 to 0.3 mg L−1, within the first 100–300 m offshore. Simultaneously, radiocarbon ages of POC drop from 16,400 to 3,600 14C years, indicating rapid settling of old permafrost POC to underlying sediments. This suggests that permafrost OC is, apart from a very narrow resuspension zone (<5 m water depth), predominantly deposited in nearshore sediments. While long‐term storage of permafrost OC in marine sediments potentially limits biodegradation and its subsequent release as greenhouse gas, resuspension of fine‐grained, OC‐rich sediments in the nearshore zone ... : Geophysical Research Letters, 47 (15) ... |
format |
Article in Journal/Newspaper |
author |
Jong, Dirk Bröder, Lisa Tanski, George Fritz, Michael Lantuit, Hugues Tesi, Tommaso Haghipour, Negar Eglinton, Timothy I. Vonk, Jorien E. |
spellingShingle |
Jong, Dirk Bröder, Lisa Tanski, George Fritz, Michael Lantuit, Hugues Tesi, Tommaso Haghipour, Negar Eglinton, Timothy I. Vonk, Jorien E. Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ... |
author_facet |
Jong, Dirk Bröder, Lisa Tanski, George Fritz, Michael Lantuit, Hugues Tesi, Tommaso Haghipour, Negar Eglinton, Timothy I. Vonk, Jorien E. |
author_sort |
Jong, Dirk |
title |
Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ... |
title_short |
Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ... |
title_full |
Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ... |
title_fullStr |
Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ... |
title_full_unstemmed |
Nearshore Zone Dynamics Determine Pathway of Organic Carbon From Eroding Permafrost Coasts ... |
title_sort |
nearshore zone dynamics determine pathway of organic carbon from eroding permafrost coasts ... |
publisher |
ETH Zurich |
publishDate |
2020 |
url |
https://dx.doi.org/10.3929/ethz-b-000432180 http://hdl.handle.net/20.500.11850/432180 |
genre |
Arctic Herschel Herschel Island permafrost Yukon |
genre_facet |
Arctic Herschel Herschel Island permafrost Yukon |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000432180 |
_version_ |
1797578304159481856 |