Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC
Arctic warming is projected to continue throughout the coming century. Yet, our currently limited understanding of the Arctic Ocean carbon cycle hinders our ability to predict how changing conditions will affect local Arctic ecosystems, regional carbon budgets, and global climate. We present here th...
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ftdatacite:10.3929/ethz-b-000047870 2023-05-15T14:33:49+02:00 Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC Griffith, David R. McNichol, Ann P. Xu, Li McLaughlin, Fiona A. McLaughlin, Fiona A. Brown, Kristina A. Eglinton, Timothy I. 2012 application/pdf https://dx.doi.org/10.3929/ethz-b-000047870 http://hdl.handle.net/20.500.11850/47870 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Text article-journal Journal Article ScholarlyArticle 2012 ftdatacite https://doi.org/10.3929/ethz-b-000047870 2021-11-05T12:55:41Z Arctic warming is projected to continue throughout the coming century. Yet, our currently limited understanding of the Arctic Ocean carbon cycle hinders our ability to predict how changing conditions will affect local Arctic ecosystems, regional carbon budgets, and global climate. We present here the first set of concurrent, full-depth, dual-isotope profiles for dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and suspended particulate organic carbon (POCsusp) at two sites in the Canada Basin of the Arctic Ocean. The carbon isotope composition of sinking and suspended POC in the Arctic contrasts strongly with open ocean Atlantic and Pacific sites, pointing to a combination of inputs to Arctic POCsusp at depth, including surface-derived organic carbon (OC), sorbed/advected OC, and OC derived from in situ DIC fixation. The latter process appears to be particularly important at intermediate depths, where mass balance calculations suggest that OC derived from in situ DIC fixation contributes up to 22% of POCsusp. As in other oceans, surface-derived OC is still a dominant source to Arctic POCsusp. Yet, we suggest that significantly smaller vertical POC fluxes in the Canada Basin make it possible to see evidence of DIC fixation in the POCsusp pool even at the bulk isotope level. : Biogeosciences, 9 (3) : ISSN:1726-4170 : ISSN:1726-4170 Text Arctic Arctic Ocean canada basin DataCite Metadata Store (German National Library of Science and Technology) Arctic Arctic Ocean Canada Pacific |
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English |
description |
Arctic warming is projected to continue throughout the coming century. Yet, our currently limited understanding of the Arctic Ocean carbon cycle hinders our ability to predict how changing conditions will affect local Arctic ecosystems, regional carbon budgets, and global climate. We present here the first set of concurrent, full-depth, dual-isotope profiles for dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and suspended particulate organic carbon (POCsusp) at two sites in the Canada Basin of the Arctic Ocean. The carbon isotope composition of sinking and suspended POC in the Arctic contrasts strongly with open ocean Atlantic and Pacific sites, pointing to a combination of inputs to Arctic POCsusp at depth, including surface-derived organic carbon (OC), sorbed/advected OC, and OC derived from in situ DIC fixation. The latter process appears to be particularly important at intermediate depths, where mass balance calculations suggest that OC derived from in situ DIC fixation contributes up to 22% of POCsusp. As in other oceans, surface-derived OC is still a dominant source to Arctic POCsusp. Yet, we suggest that significantly smaller vertical POC fluxes in the Canada Basin make it possible to see evidence of DIC fixation in the POCsusp pool even at the bulk isotope level. : Biogeosciences, 9 (3) : ISSN:1726-4170 : ISSN:1726-4170 |
format |
Text |
author |
Griffith, David R. McNichol, Ann P. Xu, Li McLaughlin, Fiona A. McLaughlin, Fiona A. Brown, Kristina A. Eglinton, Timothy I. |
spellingShingle |
Griffith, David R. McNichol, Ann P. Xu, Li McLaughlin, Fiona A. McLaughlin, Fiona A. Brown, Kristina A. Eglinton, Timothy I. Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC |
author_facet |
Griffith, David R. McNichol, Ann P. Xu, Li McLaughlin, Fiona A. McLaughlin, Fiona A. Brown, Kristina A. Eglinton, Timothy I. |
author_sort |
Griffith, David R. |
title |
Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC |
title_short |
Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC |
title_full |
Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC |
title_fullStr |
Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC |
title_full_unstemmed |
Carbon dynamics in the western Arctic Ocean: Insights from full-depth carbon isotope profiles of DIC, DOC, and POC |
title_sort |
carbon dynamics in the western arctic ocean: insights from full-depth carbon isotope profiles of dic, doc, and poc |
publisher |
ETH Zurich |
publishDate |
2012 |
url |
https://dx.doi.org/10.3929/ethz-b-000047870 http://hdl.handle.net/20.500.11850/47870 |
geographic |
Arctic Arctic Ocean Canada Pacific |
geographic_facet |
Arctic Arctic Ocean Canada Pacific |
genre |
Arctic Arctic Ocean canada basin |
genre_facet |
Arctic Arctic Ocean canada basin |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3929/ethz-b-000047870 |
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1766307003044462592 |