Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica
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 GEOTRACESSR3 transect, f...
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Online Access: | https://doi.org/10.1002/lno.11772 http://ecite.utas.edu.au/144222 |
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ftunivtasecite:oai:ecite.utas.edu.au:144222 2023-05-15T13:42:40+02:00 Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica Latour, PM Wuttig, K van der Merwe, P Strzepek, RF Gault-Ringold, M Townsend, AT Holmes, TM Corkill, M Bowie, AR 2021 https://doi.org/10.1002/lno.11772 http://ecite.utas.edu.au/144222 en eng Amer Soc Limnology Oceanography http://dx.doi.org/10.1002/lno.11772 Latour, PM and Wuttig, K and van der Merwe, P and Strzepek, RF and Gault-Ringold, M and Townsend, AT and Holmes, TM and Corkill, M and Bowie, AR, Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica, Limnology and Oceanography, 66, (6) pp. 2547-2562. ISSN 0024-3590 (2021) [Refereed Article] http://ecite.utas.edu.au/144222 Earth Sciences Oceanography Chemical oceanography Refereed Article PeerReviewed 2021 ftunivtasecite https://doi.org/10.1002/lno.11772 2022-08-30T09:11:43Z 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 GEOTRACESSR3 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 eCite UTAS (University of Tasmania) Antarctic Southern Ocean The Antarctic Austral Limnology and Oceanography 66 6 2547 2562 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Chemical oceanography |
spellingShingle |
Earth Sciences Oceanography Chemical oceanography Latour, PM Wuttig, K van der Merwe, P Strzepek, RF Gault-Ringold, M Townsend, AT Holmes, TM Corkill, M Bowie, AR Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica |
topic_facet |
Earth Sciences Oceanography Chemical oceanography |
description |
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 GEOTRACESSR3 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. |
format |
Article in Journal/Newspaper |
author |
Latour, PM Wuttig, K van der Merwe, P Strzepek, RF Gault-Ringold, M Townsend, AT Holmes, TM Corkill, M Bowie, AR |
author_facet |
Latour, PM Wuttig, K van der Merwe, P Strzepek, RF Gault-Ringold, M Townsend, AT Holmes, TM Corkill, M Bowie, AR |
author_sort |
Latour, PM |
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 |
Amer Soc Limnology Oceanography |
publishDate |
2021 |
url |
https://doi.org/10.1002/lno.11772 http://ecite.utas.edu.au/144222 |
geographic |
Antarctic Southern Ocean The Antarctic Austral |
geographic_facet |
Antarctic Southern Ocean The Antarctic Austral |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
http://dx.doi.org/10.1002/lno.11772 Latour, PM and Wuttig, K and van der Merwe, P and Strzepek, RF and Gault-Ringold, M and Townsend, AT and Holmes, TM and Corkill, M and Bowie, AR, Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica, Limnology and Oceanography, 66, (6) pp. 2547-2562. ISSN 0024-3590 (2021) [Refereed Article] http://ecite.utas.edu.au/144222 |
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 |
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1766171227031863296 |