Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis
Early studies revealed relationships between barium (Ba), particulate organic carbon and silicate, suggesting applications for Ba as a paleoproductivity tracer and as a tracer of modern ocean circulation. But, what controls the distribution of barium (Ba) in the oceans? Here, we investigated the Arc...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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AGU (American Geophysical Union)
2022
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Online Access: | https://oceanrep.geomar.de/id/eprint/55783/ https://oceanrep.geomar.de/id/eprint/55783/1/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan-Arctic%20Synthesis.pdf https://oceanrep.geomar.de/id/eprint/55783/2/2021jc017417-sup-0001-supporting https://doi.org/10.1029/2021JC017417 |
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ftoceanrep:oai:oceanrep.geomar.de:55783 2024-02-11T09:59:18+01:00 Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis Whitmore, Laura M. Shiller, Alan M. Horner, Tristan J. Xiang, Yang Auro, Maureen E. Bauch, Dorothea Dehairs, Frank Lam, Phoebe J. Li, Jingxuan Maldonado, Maria T. Mears, Chantal Newton, Robert Pasqualini, Angelica Planquette, Hélène Rember, Robert Thomas, Helmuth 2022-04-30 text https://oceanrep.geomar.de/id/eprint/55783/ https://oceanrep.geomar.de/id/eprint/55783/1/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan-Arctic%20Synthesis.pdf https://oceanrep.geomar.de/id/eprint/55783/2/2021jc017417-sup-0001-supporting https://doi.org/10.1029/2021JC017417 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/55783/1/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan-Arctic%20Synthesis.pdf https://oceanrep.geomar.de/id/eprint/55783/2/2021jc017417-sup-0001-supporting Whitmore, L. M., Shiller, A. M., Horner, T. J., Xiang, Y., Auro, M. E., Bauch, D. , Dehairs, F., Lam, P. J., Li, J., Maldonado, M. T., Mears, C., Newton, R., Pasqualini, A., Planquette, H., Rember, R. and Thomas, H. (2022) Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis. Open Access Journal of Geophysical Research: Oceans, 127 (4). e2021JC017417. DOI 10.1029/2021JC017417 <https://doi.org/10.1029/2021JC017417>. doi:10.1029/2021JC017417 cc_by_nc_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1029/2021JC017417 2024-01-15T00:25:24Z Early studies revealed relationships between barium (Ba), particulate organic carbon and silicate, suggesting applications for Ba as a paleoproductivity tracer and as a tracer of modern ocean circulation. But, what controls the distribution of barium (Ba) in the oceans? Here, we investigated the Arctic Ocean Ba cycle through a one-of-a-kind data set containing dissolved (dBa), particulate (pBa), and stable isotope Ba ratio (δ138Ba) data from four Arctic GEOTRACES expeditions conducted in 2015. We hypothesized that margins would be a substantial source of Ba to the Arctic Ocean water column. The dBa, pBa, and δ138Ba distributions all suggest significant modification of inflowing Pacific seawater over the shelves, and the dBa mass balance implies that ∼50% of the dBa inventory (upper 500 m of the Arctic water column) was supplied by nonconservative inputs. Calculated areal dBa fluxes are up to 10 μmol m−2 day−1 on the margin, which is comparable to fluxes described in other regions. Applying this approach to dBa data from the 1994 Arctic Ocean Survey yields similar results. The Canadian Arctic Archipelago did not appear to have a similar margin source; rather, the dBa distribution in this section is consistent with mixing of Arctic Ocean-derived waters and Baffin Bay-derived waters. Although we lack enough information to identify the specifics of the shelf sediment Ba source, we suspect that a sedimentary remineralization and terrigenous sources (e.g., submarine groundwater discharge or fluvial particles) are contributors. Article in Journal/Newspaper Arctic Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Pacific Journal of Geophysical Research: Oceans 127 4 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Early studies revealed relationships between barium (Ba), particulate organic carbon and silicate, suggesting applications for Ba as a paleoproductivity tracer and as a tracer of modern ocean circulation. But, what controls the distribution of barium (Ba) in the oceans? Here, we investigated the Arctic Ocean Ba cycle through a one-of-a-kind data set containing dissolved (dBa), particulate (pBa), and stable isotope Ba ratio (δ138Ba) data from four Arctic GEOTRACES expeditions conducted in 2015. We hypothesized that margins would be a substantial source of Ba to the Arctic Ocean water column. The dBa, pBa, and δ138Ba distributions all suggest significant modification of inflowing Pacific seawater over the shelves, and the dBa mass balance implies that ∼50% of the dBa inventory (upper 500 m of the Arctic water column) was supplied by nonconservative inputs. Calculated areal dBa fluxes are up to 10 μmol m−2 day−1 on the margin, which is comparable to fluxes described in other regions. Applying this approach to dBa data from the 1994 Arctic Ocean Survey yields similar results. The Canadian Arctic Archipelago did not appear to have a similar margin source; rather, the dBa distribution in this section is consistent with mixing of Arctic Ocean-derived waters and Baffin Bay-derived waters. Although we lack enough information to identify the specifics of the shelf sediment Ba source, we suspect that a sedimentary remineralization and terrigenous sources (e.g., submarine groundwater discharge or fluvial particles) are contributors. |
format |
Article in Journal/Newspaper |
author |
Whitmore, Laura M. Shiller, Alan M. Horner, Tristan J. Xiang, Yang Auro, Maureen E. Bauch, Dorothea Dehairs, Frank Lam, Phoebe J. Li, Jingxuan Maldonado, Maria T. Mears, Chantal Newton, Robert Pasqualini, Angelica Planquette, Hélène Rember, Robert Thomas, Helmuth |
spellingShingle |
Whitmore, Laura M. Shiller, Alan M. Horner, Tristan J. Xiang, Yang Auro, Maureen E. Bauch, Dorothea Dehairs, Frank Lam, Phoebe J. Li, Jingxuan Maldonado, Maria T. Mears, Chantal Newton, Robert Pasqualini, Angelica Planquette, Hélène Rember, Robert Thomas, Helmuth Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis |
author_facet |
Whitmore, Laura M. Shiller, Alan M. Horner, Tristan J. Xiang, Yang Auro, Maureen E. Bauch, Dorothea Dehairs, Frank Lam, Phoebe J. Li, Jingxuan Maldonado, Maria T. Mears, Chantal Newton, Robert Pasqualini, Angelica Planquette, Hélène Rember, Robert Thomas, Helmuth |
author_sort |
Whitmore, Laura M. |
title |
Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis |
title_short |
Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis |
title_full |
Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis |
title_fullStr |
Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis |
title_full_unstemmed |
Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis |
title_sort |
strong margin influence on the arctic ocean barium cycle revealed by pan‐arctic synthesis |
publisher |
AGU (American Geophysical Union) |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/55783/ https://oceanrep.geomar.de/id/eprint/55783/1/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan-Arctic%20Synthesis.pdf https://oceanrep.geomar.de/id/eprint/55783/2/2021jc017417-sup-0001-supporting https://doi.org/10.1029/2021JC017417 |
geographic |
Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Pacific |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Pacific |
genre |
Arctic Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago |
genre_facet |
Arctic Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago |
op_relation |
https://oceanrep.geomar.de/id/eprint/55783/1/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan-Arctic%20Synthesis.pdf https://oceanrep.geomar.de/id/eprint/55783/2/2021jc017417-sup-0001-supporting Whitmore, L. M., Shiller, A. M., Horner, T. J., Xiang, Y., Auro, M. E., Bauch, D. , Dehairs, F., Lam, P. J., Li, J., Maldonado, M. T., Mears, C., Newton, R., Pasqualini, A., Planquette, H., Rember, R. and Thomas, H. (2022) Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan‐Arctic Synthesis. Open Access Journal of Geophysical Research: Oceans, 127 (4). e2021JC017417. DOI 10.1029/2021JC017417 <https://doi.org/10.1029/2021JC017417>. doi:10.1029/2021JC017417 |
op_rights |
cc_by_nc_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021JC017417 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
127 |
container_issue |
4 |
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1790595267089661952 |