Strong Margin Influence on the Arctic Ocean Barium Cycle Revealed by Pan-Arctic Synthesis
International audience 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,...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , , , , , , , , , , , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://insu.hal.science/insu-03685883 https://insu.hal.science/insu-03685883/document https://insu.hal.science/insu-03685883/file/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan%25u2010Arctic%20Synthesis.pdf https://doi.org/10.1029/2021JC017417 |
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ftccsdartic:oai:HAL:insu-03685883v1 |
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openpolar |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
GEOTRACES barium isotopes geochemical cycles climate continental shelves [SDU]Sciences of the Universe [physics] |
spellingShingle |
GEOTRACES barium isotopes geochemical cycles climate continental shelves [SDU]Sciences of the Universe [physics] 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 |
topic_facet |
GEOTRACES barium isotopes geochemical cycles climate continental shelves [SDU]Sciences of the Universe [physics] |
description |
International audience 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 (δ 138 Ba) 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 δ 138 Ba 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. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
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 |
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 |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03685883 https://insu.hal.science/insu-03685883/document https://insu.hal.science/insu-03685883/file/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan%25u2010Arctic%20Synthesis.pdf 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 Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03685883 Journal of Geophysical Research. Oceans, 2022, 127, ⟨10.1029/2021JC017417⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JC017417 insu-03685883 https://insu.hal.science/insu-03685883 https://insu.hal.science/insu-03685883/document https://insu.hal.science/insu-03685883/file/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan%25u2010Arctic%20Synthesis.pdf BIBCODE: 2022JGRC.12717417W doi:10.1029/2021JC017417 |
op_rights |
http://creativecommons.org/licenses/by-sa/ 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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1792043288889393152 |
spelling |
ftccsdartic:oai:HAL:insu-03685883v1 2024-02-27T08:36:21+00:00 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 Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2022 https://insu.hal.science/insu-03685883 https://insu.hal.science/insu-03685883/document https://insu.hal.science/insu-03685883/file/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan%25u2010Arctic%20Synthesis.pdf https://doi.org/10.1029/2021JC017417 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JC017417 insu-03685883 https://insu.hal.science/insu-03685883 https://insu.hal.science/insu-03685883/document https://insu.hal.science/insu-03685883/file/JGR%20Oceans%20-%202022%20-%20Whitmore%20-%20Strong%20Margin%20Influence%20on%20the%20Arctic%20Ocean%20Barium%20Cycle%20Revealed%20by%20Pan%25u2010Arctic%20Synthesis.pdf BIBCODE: 2022JGRC.12717417W doi:10.1029/2021JC017417 http://creativecommons.org/licenses/by-sa/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03685883 Journal of Geophysical Research. Oceans, 2022, 127, ⟨10.1029/2021JC017417⟩ GEOTRACES barium isotopes geochemical cycles climate continental shelves [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.1029/2021JC017417 2024-01-28T01:20:29Z International audience 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 (δ 138 Ba) 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 δ 138 Ba 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 Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Pacific Journal of Geophysical Research: Oceans 127 4 |