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...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2012
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-9-1217-2012 https://doaj.org/article/a6908f6a1b344a8eb57011171e9ab5df |
id |
ftdoajarticles:oai:doaj.org/article:a6908f6a1b344a8eb57011171e9ab5df |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:a6908f6a1b344a8eb57011171e9ab5df 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 D. R. Griffith A. P. McNichol L. Xu F. A. McLaughlin R. W. Macdonald K. A. Brown T. I. Eglinton 2012-03-01T00:00:00Z https://doi.org/10.5194/bg-9-1217-2012 https://doaj.org/article/a6908f6a1b344a8eb57011171e9ab5df EN eng Copernicus Publications http://www.biogeosciences.net/9/1217/2012/bg-9-1217-2012.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-9-1217-2012 1726-4170 1726-4189 https://doaj.org/article/a6908f6a1b344a8eb57011171e9ab5df Biogeosciences, Vol 9, Iss 3, Pp 1217-1224 (2012) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/bg-9-1217-2012 2022-12-30T23:04:35Z 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. Article in Journal/Newspaper Arctic Arctic Ocean canada basin Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Canada Pacific Biogeosciences 9 3 1217 1224 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 D. R. Griffith A. P. McNichol L. Xu F. A. McLaughlin R. W. Macdonald K. A. Brown T. I. Eglinton Carbon dynamics in the western Arctic Ocean: insights from full-depth carbon isotope profiles of DIC, DOC, and POC |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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. |
format |
Article in Journal/Newspaper |
author |
D. R. Griffith A. P. McNichol L. Xu F. A. McLaughlin R. W. Macdonald K. A. Brown T. I. Eglinton |
author_facet |
D. R. Griffith A. P. McNichol L. Xu F. A. McLaughlin R. W. Macdonald K. A. Brown T. I. Eglinton |
author_sort |
D. R. Griffith |
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 |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/bg-9-1217-2012 https://doaj.org/article/a6908f6a1b344a8eb57011171e9ab5df |
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_source |
Biogeosciences, Vol 9, Iss 3, Pp 1217-1224 (2012) |
op_relation |
http://www.biogeosciences.net/9/1217/2012/bg-9-1217-2012.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-9-1217-2012 1726-4170 1726-4189 https://doaj.org/article/a6908f6a1b344a8eb57011171e9ab5df |
op_doi |
https://doi.org/10.5194/bg-9-1217-2012 |
container_title |
Biogeosciences |
container_volume |
9 |
container_issue |
3 |
container_start_page |
1217 |
op_container_end_page |
1224 |
_version_ |
1766307002510737408 |