Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S
NERC NE/H004475/1 <jats:title>Abstract</jats:title><jats:p>The biogeochemical cycle of zinc (Zn) in the South Atlantic, at 40°S, was investigated as part of the UK GEOTRACES program. To date there is little understanding of the supply of Zn, an essential requirement for phytoplankt...
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American Geophysical Union (AGU)
2014
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Online Access: | http://hdl.handle.net/10026.1/4354 https://doi.org/10.1002/2013GB004637 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/4354 2024-05-19T07:48:58+00:00 Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S Wyatt, NJ Milne, A Woodward, EMS Rees, AP Browning, TJ Bouman, HA Worsfold, PJ Lohan, MC 2014-01-02 44-56 application/pdf http://hdl.handle.net/10026.1/4354 https://doi.org/10.1002/2013GB004637 en eng American Geophysical Union (AGU) ISSN:0886-6236 ISSN:1944-9224 E-ISSN:1944-9224 0886-6236 1944-9224 http://hdl.handle.net/10026.1/4354 doi:10.1002/2013GB004637 2015-1-2 Not known Zinc Biogeochemistry South Atlantic Chemical oceanography GEOTRACES journal-article Article 2014 ftunivplympearl https://doi.org/10.1002/2013GB004637 2024-05-01T00:07:16Z NERC NE/H004475/1 <jats:title>Abstract</jats:title><jats:p>The biogeochemical cycle of zinc (Zn) in the South Atlantic, at 40°S, was investigated as part of the UK GEOTRACES program. To date there is little understanding of the supply of Zn, an essential requirement for phytoplankton growth, to this highly productive region. Vertical Zn profiles displayed nutrient‐like distributions with distinct gradients associated with the water masses present. Surface Zn concentrations are among the lowest reported for the world's oceans (< 50 pM). A strong Zn‐Si linear relationship was observed (Zn (nM) = 0.065 Si (μM), <jats:italic>r</jats:italic><jats:sup>2</jats:sup> = 0.97, <jats:italic>n</jats:italic> = 460). Our results suggest that the use of a global Zn‐Si relationship would lead to an underestimation of dissolved Zn in deeper waters of the South Atlantic. By utilizing Si* and a new tracer Zn* our data indicate that the preferential removal of Zn in the Southern Ocean prevented a direct return path for dissolved Zn to the surface waters of the South Atlantic at 40°S and potentially the thermocline waters of the South Atlantic subtropical gyre. The importance of Zn for phytoplankton growth was evaluated using the Zn‐soluble reactive phosphorus (SRP) relationship. We hypothesize that the low Zn concentrations in the South Atlantic may select for phytoplankton cells with a lower Zn requirement. In addition, a much deeper kink at ~ 500m in the Zn:SRP ratio was observed compared to other oceanic regions.</jats:p> Article in Journal/Newspaper Southern Ocean PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Global Biogeochemical Cycles 28 1 44 56 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
Zinc Biogeochemistry South Atlantic Chemical oceanography GEOTRACES |
spellingShingle |
Zinc Biogeochemistry South Atlantic Chemical oceanography GEOTRACES Wyatt, NJ Milne, A Woodward, EMS Rees, AP Browning, TJ Bouman, HA Worsfold, PJ Lohan, MC Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S |
topic_facet |
Zinc Biogeochemistry South Atlantic Chemical oceanography GEOTRACES |
description |
NERC NE/H004475/1 <jats:title>Abstract</jats:title><jats:p>The biogeochemical cycle of zinc (Zn) in the South Atlantic, at 40°S, was investigated as part of the UK GEOTRACES program. To date there is little understanding of the supply of Zn, an essential requirement for phytoplankton growth, to this highly productive region. Vertical Zn profiles displayed nutrient‐like distributions with distinct gradients associated with the water masses present. Surface Zn concentrations are among the lowest reported for the world's oceans (< 50 pM). A strong Zn‐Si linear relationship was observed (Zn (nM) = 0.065 Si (μM), <jats:italic>r</jats:italic><jats:sup>2</jats:sup> = 0.97, <jats:italic>n</jats:italic> = 460). Our results suggest that the use of a global Zn‐Si relationship would lead to an underestimation of dissolved Zn in deeper waters of the South Atlantic. By utilizing Si* and a new tracer Zn* our data indicate that the preferential removal of Zn in the Southern Ocean prevented a direct return path for dissolved Zn to the surface waters of the South Atlantic at 40°S and potentially the thermocline waters of the South Atlantic subtropical gyre. The importance of Zn for phytoplankton growth was evaluated using the Zn‐soluble reactive phosphorus (SRP) relationship. We hypothesize that the low Zn concentrations in the South Atlantic may select for phytoplankton cells with a lower Zn requirement. In addition, a much deeper kink at ~ 500m in the Zn:SRP ratio was observed compared to other oceanic regions.</jats:p> |
format |
Article in Journal/Newspaper |
author |
Wyatt, NJ Milne, A Woodward, EMS Rees, AP Browning, TJ Bouman, HA Worsfold, PJ Lohan, MC |
author_facet |
Wyatt, NJ Milne, A Woodward, EMS Rees, AP Browning, TJ Bouman, HA Worsfold, PJ Lohan, MC |
author_sort |
Wyatt, NJ |
title |
Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S |
title_short |
Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S |
title_full |
Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S |
title_fullStr |
Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S |
title_full_unstemmed |
Biogeochemical cycling of dissolved zinc along the GEOTRACES South Atlantic transect GA10 at 40°S |
title_sort |
biogeochemical cycling of dissolved zinc along the geotraces south atlantic transect ga10 at 40°s |
publisher |
American Geophysical Union (AGU) |
publishDate |
2014 |
url |
http://hdl.handle.net/10026.1/4354 https://doi.org/10.1002/2013GB004637 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
ISSN:0886-6236 ISSN:1944-9224 E-ISSN:1944-9224 0886-6236 1944-9224 http://hdl.handle.net/10026.1/4354 doi:10.1002/2013GB004637 |
op_rights |
2015-1-2 Not known |
op_doi |
https://doi.org/10.1002/2013GB004637 |
container_title |
Global Biogeochemical Cycles |
container_volume |
28 |
container_issue |
1 |
container_start_page |
44 |
op_container_end_page |
56 |
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1799467372636012544 |