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Bioactive trace metal distributions and biogeochemical controls in the Southern Ocean

Bioactive trace metal distributions and biogeochemical controls in the Southern Ocean
Bioactive trace metal distributions and biogeochemical controls in the Southern Ocean
Extensive sampling in many regions of the Southern Ocean has demonstrated that surface water concentrations of dissolved Fe are low enough to limit phytoplankton growth. In contrast, there is currently no evidence that other bioactive elements (e.g., Mn, Zn, Co) are similarly limiting. Although atmospheric input of dissolved Fe to Southern Ocean surface waters appears to be low, resuspension of sediments from shallow regions around islands and the Antarctic coastline can inject significant amounts of Fe into the surrounding waters, stimulating primary production and providing a natural laboratory for studying the response of biological systems to natural Fe fertilization processes. Future work using a multitracer approach across seasonal transitions would be particularly beneficial to quantifying input processes and fluxes. However, it would require the design of new sampling platforms that can accommodate trace metal sampling under extreme weather conditions.
1042-8275
122-133
Measures, Christopher I.
bee0ab0a-cbec-491e-bcfa-e0cec9df67bb
Hatta, Mariko
b8c210ca-90aa-4660-b1b7-3538b120e31d
Grand, Maxime M.
659acbde-d639-42b7-9fab-52fa1b3655ff
Measures, Christopher I.
bee0ab0a-cbec-491e-bcfa-e0cec9df67bb
Hatta, Mariko
b8c210ca-90aa-4660-b1b7-3538b120e31d
Grand, Maxime M.
659acbde-d639-42b7-9fab-52fa1b3655ff

Measures, Christopher I., Hatta, Mariko and Grand, Maxime M. (2012) Bioactive trace metal distributions and biogeochemical controls in the Southern Ocean. Oceanography, 25 (3), 122-133. (doi:10.5670/oceanog.2012.85).

Record type: Article

Abstract

Extensive sampling in many regions of the Southern Ocean has demonstrated that surface water concentrations of dissolved Fe are low enough to limit phytoplankton growth. In contrast, there is currently no evidence that other bioactive elements (e.g., Mn, Zn, Co) are similarly limiting. Although atmospheric input of dissolved Fe to Southern Ocean surface waters appears to be low, resuspension of sediments from shallow regions around islands and the Antarctic coastline can inject significant amounts of Fe into the surrounding waters, stimulating primary production and providing a natural laboratory for studying the response of biological systems to natural Fe fertilization processes. Future work using a multitracer approach across seasonal transitions would be particularly beneficial to quantifying input processes and fluxes. However, it would require the design of new sampling platforms that can accommodate trace metal sampling under extreme weather conditions.

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More information

Published date: 2012
Organisations: Geochemistry

Identifiers

Local EPrints ID: 379891
URI: http://eprints.soton.ac.uk/id/eprint/379891
ISSN: 1042-8275
PURE UUID: d9a9ea6b-da45-4571-9121-d22e06cc9c0b
ORCID for Maxime M. Grand: ORCID iD orcid.org/0000-0001-9338-694X

Catalogue record

Date deposited: 03 Aug 2015 13:37
Last modified: 15 Jul 2019 21:10

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