Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02
The distribution of dissolved (D) and acid-dissolvable (AD) Fe, Ni, Cu and Pb in the upper watercolumn (0300mdepth)was determined in the Australian sector of the Southern Ocean (140Emeridian) during three cruises conducted between November 2001 and March 2002. For Ni andCu, therewas no significant d...
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Language: | English |
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Elsevier Science BV
2008
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ftunivtasecite:oai:ecite.utas.edu.au:57169 2023-05-15T13:35:38+02:00 Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02 Lai, X Norisuye, K Mikata, M Minami, T Bowie, AR Sohrin, Y 2008 application/pdf http://www.sciencedirect.com https://doi.org/10.1016/j.marchem.2008.05.001 http://ecite.utas.edu.au/57169 en eng Elsevier Science BV http://ecite.utas.edu.au/57169/2/Bowie, AR.PDF http://dx.doi.org/10.1016/j.marchem.2008.05.001 Lai, X and Norisuye, K and Mikata, M and Minami, T and Bowie, AR and Sohrin, Y, Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02, Marine Chemistry, 111, (40271) pp. 171-183. ISSN 0304-4203 (2008) [Refereed Article] http://ecite.utas.edu.au/57169 Earth Sciences Oceanography Chemical Oceanography Refereed Article PeerReviewed 2008 ftunivtasecite https://doi.org/10.1016/j.marchem.2008.05.001 2019-12-13T21:29:14Z The distribution of dissolved (D) and acid-dissolvable (AD) Fe, Ni, Cu and Pb in the upper watercolumn (0300mdepth)was determined in the Australian sector of the Southern Ocean (140Emeridian) during three cruises conducted between November 2001 and March 2002. For Ni andCu, therewas no significant difference in concentration between dissolved and acid-dissolvablespecies. DNi and DCu showed significant (P = 0.01) positive correlations with silicate, phosphateand nitrate, reflecting their strong nutrient-type behaviour. For Fe and Pb, the acid-dissolvableconcentration mostly exceeded the dissolved concentration, reflecting the importance of labileparticulate species for these elements. DPb decreased between January and February in thePolar Frontal Zone and in Antarctic continental shelf water. ADPb maxima occurred in theAntarctic Zone, resulting in a maximum AD/D ratio of 7. The mean DFe concentration in thesurface mixed layer was 0.3 nM in the sub-Antarctic zone, 0.4 nM in the Polar Frontal Zone,0.5 nM in the Antarctic Zone and increased southward beyond the Antarctic Divergence andtowards the continent. DFe did not show a clear temporal change in its horizontal distribution,which was in contrast to the other nutrients and trace metals. ADFe substantially increased inAntarctic continental shelf water where the AD/D ratio reached 11. The following conclusionscan be drawn from these data. (1) Ni and Cu exist exclusively as dissolved species and theirdistributions are mainly controlled by their biogeochemical cycling, similar to those of themajor nutrients. (2) Pb is dominated by particulate species. The distribution of DPb istemporally and spatially variable due to a sporadic source and strong scavenging. (3) DFe israther a minor fraction of total Fe in Antarctic continental shelf water where shelf sedimentsand Antarctic sea-ice appear to be strong sources for Fe. There is substantial temporal variationin the supply of Fe to the upper water column. DFe in the mixed layer of the open SouthernOcean is maintained at low concentrations throughout summer due to uptake by phytoplanktonand scavenging. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean eCite UTAS (University of Tasmania) Antarctic Austral Southern Ocean The Antarctic Marine Chemistry 111 3-4 171 183 |
institution |
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 Lai, X Norisuye, K Mikata, M Minami, T Bowie, AR Sohrin, Y Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02 |
topic_facet |
Earth Sciences Oceanography Chemical Oceanography |
description |
The distribution of dissolved (D) and acid-dissolvable (AD) Fe, Ni, Cu and Pb in the upper watercolumn (0300mdepth)was determined in the Australian sector of the Southern Ocean (140Emeridian) during three cruises conducted between November 2001 and March 2002. For Ni andCu, therewas no significant difference in concentration between dissolved and acid-dissolvablespecies. DNi and DCu showed significant (P = 0.01) positive correlations with silicate, phosphateand nitrate, reflecting their strong nutrient-type behaviour. For Fe and Pb, the acid-dissolvableconcentration mostly exceeded the dissolved concentration, reflecting the importance of labileparticulate species for these elements. DPb decreased between January and February in thePolar Frontal Zone and in Antarctic continental shelf water. ADPb maxima occurred in theAntarctic Zone, resulting in a maximum AD/D ratio of 7. The mean DFe concentration in thesurface mixed layer was 0.3 nM in the sub-Antarctic zone, 0.4 nM in the Polar Frontal Zone,0.5 nM in the Antarctic Zone and increased southward beyond the Antarctic Divergence andtowards the continent. DFe did not show a clear temporal change in its horizontal distribution,which was in contrast to the other nutrients and trace metals. ADFe substantially increased inAntarctic continental shelf water where the AD/D ratio reached 11. The following conclusionscan be drawn from these data. (1) Ni and Cu exist exclusively as dissolved species and theirdistributions are mainly controlled by their biogeochemical cycling, similar to those of themajor nutrients. (2) Pb is dominated by particulate species. The distribution of DPb istemporally and spatially variable due to a sporadic source and strong scavenging. (3) DFe israther a minor fraction of total Fe in Antarctic continental shelf water where shelf sedimentsand Antarctic sea-ice appear to be strong sources for Fe. There is substantial temporal variationin the supply of Fe to the upper water column. DFe in the mixed layer of the open SouthernOcean is maintained at low concentrations throughout summer due to uptake by phytoplanktonand scavenging. |
format |
Article in Journal/Newspaper |
author |
Lai, X Norisuye, K Mikata, M Minami, T Bowie, AR Sohrin, Y |
author_facet |
Lai, X Norisuye, K Mikata, M Minami, T Bowie, AR Sohrin, Y |
author_sort |
Lai, X |
title |
Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02 |
title_short |
Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02 |
title_full |
Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02 |
title_fullStr |
Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02 |
title_full_unstemmed |
Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02 |
title_sort |
spatial and temporal distribution of fe, ni, cu and pb along 140 e in the southern ocean during austral summer 2001/02 |
publisher |
Elsevier Science BV |
publishDate |
2008 |
url |
http://www.sciencedirect.com https://doi.org/10.1016/j.marchem.2008.05.001 http://ecite.utas.edu.au/57169 |
geographic |
Antarctic Austral Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
http://ecite.utas.edu.au/57169/2/Bowie, AR.PDF http://dx.doi.org/10.1016/j.marchem.2008.05.001 Lai, X and Norisuye, K and Mikata, M and Minami, T and Bowie, AR and Sohrin, Y, Spatial and temporal distribution of Fe, Ni, Cu and Pb along 140 E in the Southern Ocean during austral summer 2001/02, Marine Chemistry, 111, (40271) pp. 171-183. ISSN 0304-4203 (2008) [Refereed Article] http://ecite.utas.edu.au/57169 |
op_doi |
https://doi.org/10.1016/j.marchem.2008.05.001 |
container_title |
Marine Chemistry |
container_volume |
111 |
container_issue |
3-4 |
container_start_page |
171 |
op_container_end_page |
183 |
_version_ |
1766068129625014272 |