Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean
The Southern Ocean is the largest high-nutrient low-chlorophyll environment in the global ocean, and represents an important source of intermediate and deep waters to lower latitudes. Constraining Southern Ocean trace metal biogeochemical cycling is therefore important not just for understanding bio...
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Digital Commons @ University of South Florida
2020
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Online Access: | https://digitalcommons.usf.edu/msc_facpub/2481 https://doi.org/10.1016/j.marchem.2020.103773 https://digitalcommons.usf.edu/context/msc_facpub/article/3484/viewcontent/1_s2.0_S0304420320300256_main.pdf |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-3484 2023-07-30T03:58:54+02:00 Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean Janssen, David J. Sieber, Matthias Ellwood, Michael J. Conway, Tim M. Barrett, Pamela M. Chen, Xiaoyu de Souza, Gregory F. Hassler, Christel S. Jaccard, Samuel L. 2020-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/2481 https://doi.org/10.1016/j.marchem.2020.103773 https://digitalcommons.usf.edu/context/msc_facpub/article/3484/viewcontent/1_s2.0_S0304420320300256_main.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/2481 doi:10.1016/j.marchem.2020.103773 https://digitalcommons.usf.edu/context/msc_facpub/article/3484/viewcontent/1_s2.0_S0304420320300256_main.pdf http://creativecommons.org/licenses/by-nc-nd/4.0/ Marine Science Faculty Publications Trace Metal Southern Ocean GEOTRACES Iron Antarctic Circumnavigation Expedition Life Sciences article 2020 ftusouthflorida https://doi.org/10.1016/j.marchem.2020.103773 2023-07-13T21:07:55Z The Southern Ocean is the largest high-nutrient low-chlorophyll environment in the global ocean, and represents an important source of intermediate and deep waters to lower latitudes. Constraining Southern Ocean trace metal biogeochemical cycling is therefore important not just for understanding biological productivity and carbon cycling regionally, but also for understanding trace metal distributions throughout the lower latitude oceans. We present dissolved Fe, Ni, Cu, Zn, Cd, Pb and macronutrient concentrations in the Indian and Pacific sectors of the Southern Ocean from the Antarctic Circumnavigation Expedition (austral summer 2016-17), which included the first opportunities to study trace metal cycling at the Mertz Glacier Polynya and the Balleny Islands, as well as two meridional cross-frontal transects. Dissolved Ni, Cu, Zn, Cd and macronutrient concentrations show similar or greater variability latitudinally within surface waters than vertically through the water column, reflecting the combined influence of circulation and biological drawdown in shaping the distributions of nutrient-type elements in the Southern Ocean. Slopes of Cu-Si(OH)4 and Cd-PO4 increase from the Polar Frontal Zone to south of the Southern ACC Boundary (Cu-Si(OH)4) and from the Subantarctic Zone to the Antarctic Zone (Cd-PO4). Latitudinal differences are also observed for Ni-Si(OH)4 and Zn-PO4, with distinct Subantarctic Zone trends relative to those south of the Polar Front. Similarities between our Zn-Si(OH)4 and Cd-PO4 correlations and global compilations reflect the importance of exported Southern Ocean waters in setting these metal-macronutrient couples globally. Distinct Ni-macronutrient correlations are observed in this dataset relative to the global ocean, which supports a distinct cycling of Ni in the Southern Ocean compared to other basins. Concentrations of Pb are among the lowest observed in the global ocean; however, a local maximum is seen along the density level corresponding with Antarctic Intermediate Water. ... Article in Journal/Newspaper Antarc* Antarctic Balleny Islands Mertz Glacier Southern Ocean University of South Florida St. Petersburg: Digital USFSP Antarctic Austral Balleny Islands Indian Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Pacific Southern Ocean The Antarctic Marine Chemistry 221 103773 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Trace Metal Southern Ocean GEOTRACES Iron Antarctic Circumnavigation Expedition Life Sciences |
spellingShingle |
Trace Metal Southern Ocean GEOTRACES Iron Antarctic Circumnavigation Expedition Life Sciences Janssen, David J. Sieber, Matthias Ellwood, Michael J. Conway, Tim M. Barrett, Pamela M. Chen, Xiaoyu de Souza, Gregory F. Hassler, Christel S. Jaccard, Samuel L. Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean |
topic_facet |
Trace Metal Southern Ocean GEOTRACES Iron Antarctic Circumnavigation Expedition Life Sciences |
description |
The Southern Ocean is the largest high-nutrient low-chlorophyll environment in the global ocean, and represents an important source of intermediate and deep waters to lower latitudes. Constraining Southern Ocean trace metal biogeochemical cycling is therefore important not just for understanding biological productivity and carbon cycling regionally, but also for understanding trace metal distributions throughout the lower latitude oceans. We present dissolved Fe, Ni, Cu, Zn, Cd, Pb and macronutrient concentrations in the Indian and Pacific sectors of the Southern Ocean from the Antarctic Circumnavigation Expedition (austral summer 2016-17), which included the first opportunities to study trace metal cycling at the Mertz Glacier Polynya and the Balleny Islands, as well as two meridional cross-frontal transects. Dissolved Ni, Cu, Zn, Cd and macronutrient concentrations show similar or greater variability latitudinally within surface waters than vertically through the water column, reflecting the combined influence of circulation and biological drawdown in shaping the distributions of nutrient-type elements in the Southern Ocean. Slopes of Cu-Si(OH)4 and Cd-PO4 increase from the Polar Frontal Zone to south of the Southern ACC Boundary (Cu-Si(OH)4) and from the Subantarctic Zone to the Antarctic Zone (Cd-PO4). Latitudinal differences are also observed for Ni-Si(OH)4 and Zn-PO4, with distinct Subantarctic Zone trends relative to those south of the Polar Front. Similarities between our Zn-Si(OH)4 and Cd-PO4 correlations and global compilations reflect the importance of exported Southern Ocean waters in setting these metal-macronutrient couples globally. Distinct Ni-macronutrient correlations are observed in this dataset relative to the global ocean, which supports a distinct cycling of Ni in the Southern Ocean compared to other basins. Concentrations of Pb are among the lowest observed in the global ocean; however, a local maximum is seen along the density level corresponding with Antarctic Intermediate Water. ... |
format |
Article in Journal/Newspaper |
author |
Janssen, David J. Sieber, Matthias Ellwood, Michael J. Conway, Tim M. Barrett, Pamela M. Chen, Xiaoyu de Souza, Gregory F. Hassler, Christel S. Jaccard, Samuel L. |
author_facet |
Janssen, David J. Sieber, Matthias Ellwood, Michael J. Conway, Tim M. Barrett, Pamela M. Chen, Xiaoyu de Souza, Gregory F. Hassler, Christel S. Jaccard, Samuel L. |
author_sort |
Janssen, David J. |
title |
Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean |
title_short |
Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean |
title_full |
Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean |
title_fullStr |
Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean |
title_full_unstemmed |
Trace Metal and Nutrient Dynamics across Broad Biogeochemical Gradients in the Indian and Pacific Sectors of the Southern Ocean |
title_sort |
trace metal and nutrient dynamics across broad biogeochemical gradients in the indian and pacific sectors of the southern ocean |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2020 |
url |
https://digitalcommons.usf.edu/msc_facpub/2481 https://doi.org/10.1016/j.marchem.2020.103773 https://digitalcommons.usf.edu/context/msc_facpub/article/3484/viewcontent/1_s2.0_S0304420320300256_main.pdf |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) |
geographic |
Antarctic Austral Balleny Islands Indian Mertz Glacier Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Balleny Islands Indian Mertz Glacier Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Balleny Islands Mertz Glacier Southern Ocean |
genre_facet |
Antarc* Antarctic Balleny Islands Mertz Glacier Southern Ocean |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/2481 doi:10.1016/j.marchem.2020.103773 https://digitalcommons.usf.edu/context/msc_facpub/article/3484/viewcontent/1_s2.0_S0304420320300256_main.pdf |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1016/j.marchem.2020.103773 |
container_title |
Marine Chemistry |
container_volume |
221 |
container_start_page |
103773 |
_version_ |
1772809621525757952 |