Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica
Abstract Manganese (Mn) is an abundant element in the Earth's crust. However, its concentrations in open ocean seawater are low, where external inputs are scarce. In this study, we report the dissolved Mn and particulate Mn distributions in the Southern Ocean, measured along the GEOTRACES—SR3 t...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.1002/lno.11772 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11772 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11772 https://aslopubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/lno.11772 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11772 |
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crwiley:10.1002/lno.11772 2024-10-06T13:43:41+00:00 Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica Latour, Pauline Wuttig, Kathrin van der Merwe, Pier Strzepek, Robert F. Gault‐Ringold, Melanie Townsend, Ashley T. Holmes, Thomas M. Corkill, Matthew Bowie, Andrew R. Antarctic Climate and Ecosystems Cooperative Research Centre Australian Research Council 2021 http://dx.doi.org/10.1002/lno.11772 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11772 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11772 https://aslopubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/lno.11772 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11772 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 66, issue 6, page 2547-2562 ISSN 0024-3590 1939-5590 journal-article 2021 crwiley https://doi.org/10.1002/lno.11772 2024-09-11T04:17:50Z Abstract Manganese (Mn) is an abundant element in the Earth's crust. However, its concentrations in open ocean seawater are low, where external inputs are scarce. In this study, we report the dissolved Mn and particulate Mn distributions in the Southern Ocean, measured along the GEOTRACES—SR3 transect, from Tasmania (Australia) to Antarctica in the Southern Ocean, during the austral summer 2018. Both dissolved Mn and particulate Mn concentrations were generally low away from localized sources (< 0.3 nmol L −1 and < 0.1 nmol L −1 , respectively) along the transect. Our observations of a lower labile particulate fraction than previously measured suggest the Southern Ocean has a unique particulate Mn composition. Low surface dissolved Mn concentrations were attributed to biological uptake and few external sources. Our results suggest biological control of the Mn cycle was higher above the Antarctic continental slope, compared to the rest of the section, and our particulate Mn : P ratios indicated the presence of iron‐stressed diatoms south of the Sub‐Antarctic Front. We suggest low dissolved Mn surface concentrations may (co‐)limit phytoplankton growth in this region. Localized higher dissolved Mn concentrations were observed due to external sources, such as sedimentary and hydrothermal inputs. The presence of an eddy at the same latitude as a hydrothermal plume induced an upwelling of hydrothermally enriched waters up to 1000 m; however, no dissolved Mn inputs to the surface waters were observed. We suggest previous dissolved Mn inputs to the surface layer may be obscured by biological uptake. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Wiley Online Library Antarctic Austral Southern Ocean The Antarctic Limnology and Oceanography 66 6 2547 2562 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Manganese (Mn) is an abundant element in the Earth's crust. However, its concentrations in open ocean seawater are low, where external inputs are scarce. In this study, we report the dissolved Mn and particulate Mn distributions in the Southern Ocean, measured along the GEOTRACES—SR3 transect, from Tasmania (Australia) to Antarctica in the Southern Ocean, during the austral summer 2018. Both dissolved Mn and particulate Mn concentrations were generally low away from localized sources (< 0.3 nmol L −1 and < 0.1 nmol L −1 , respectively) along the transect. Our observations of a lower labile particulate fraction than previously measured suggest the Southern Ocean has a unique particulate Mn composition. Low surface dissolved Mn concentrations were attributed to biological uptake and few external sources. Our results suggest biological control of the Mn cycle was higher above the Antarctic continental slope, compared to the rest of the section, and our particulate Mn : P ratios indicated the presence of iron‐stressed diatoms south of the Sub‐Antarctic Front. We suggest low dissolved Mn surface concentrations may (co‐)limit phytoplankton growth in this region. Localized higher dissolved Mn concentrations were observed due to external sources, such as sedimentary and hydrothermal inputs. The presence of an eddy at the same latitude as a hydrothermal plume induced an upwelling of hydrothermally enriched waters up to 1000 m; however, no dissolved Mn inputs to the surface waters were observed. We suggest previous dissolved Mn inputs to the surface layer may be obscured by biological uptake. |
author2 |
Antarctic Climate and Ecosystems Cooperative Research Centre Australian Research Council |
format |
Article in Journal/Newspaper |
author |
Latour, Pauline Wuttig, Kathrin van der Merwe, Pier Strzepek, Robert F. Gault‐Ringold, Melanie Townsend, Ashley T. Holmes, Thomas M. Corkill, Matthew Bowie, Andrew R. |
spellingShingle |
Latour, Pauline Wuttig, Kathrin van der Merwe, Pier Strzepek, Robert F. Gault‐Ringold, Melanie Townsend, Ashley T. Holmes, Thomas M. Corkill, Matthew Bowie, Andrew R. Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica |
author_facet |
Latour, Pauline Wuttig, Kathrin van der Merwe, Pier Strzepek, Robert F. Gault‐Ringold, Melanie Townsend, Ashley T. Holmes, Thomas M. Corkill, Matthew Bowie, Andrew R. |
author_sort |
Latour, Pauline |
title |
Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica |
title_short |
Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica |
title_full |
Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica |
title_fullStr |
Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica |
title_full_unstemmed |
Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica |
title_sort |
manganese biogeochemistry in the southern ocean, from tasmania to antarctica |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/lno.11772 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11772 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11772 https://aslopubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/lno.11772 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11772 |
geographic |
Antarctic Austral Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
Limnology and Oceanography volume 66, issue 6, page 2547-2562 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.11772 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
6 |
container_start_page |
2547 |
op_container_end_page |
2562 |
_version_ |
1812182219664392192 |