Articles | Volume 19, issue 13
https://doi.org/10.5194/bg-19-3209-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-3209-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
11 Jul 2022
Research article |
| 11 Jul 2022
| 11 Jul 2022
Early winter barium excess in the southern Indian Ocean as an annual remineralisation proxy (GEOTRACES GIPr07 cruise)
Natasha René van Horsten
CORRESPONDING AUTHOR
Univ Brest, CNRS, IRD, Ifremer, LEMAR, 29280 Plouzane, France
SOCCO, CSIR, Lower Hope Road, Cape Town, 7700, South Africa
Department of Earth Sciences, TracEx, Stellenbosch University,
Stellenbosch, 7600, South Africa
Hélène Planquette
Univ Brest, CNRS, IRD, Ifremer, LEMAR, 29280 Plouzane, France
Géraldine Sarthou
Univ Brest, CNRS, IRD, Ifremer, LEMAR, 29280 Plouzane, France
Thomas James Ryan-Keogh
SOCCO, CSIR, Lower Hope Road, Cape Town, 7700, South Africa
Nolwenn Lemaitre
Department of Earth Sciences, Institute of Geochemistry and Petrology,
ETH Zurich, Zurich, Switzerland
Thato Nicholas Mtshali
Department of Forestry, Fisheries and Environment, Oceans and Coasts,
Foretrust Building, Martin Hammerschlag Way, Cape Town, 8001, South Africa
Alakendra Roychoudhury
Department of Earth Sciences, TracEx, Stellenbosch University,
Stellenbosch, 7600, South Africa
Eva Bucciarelli
CORRESPONDING AUTHOR
Univ Brest, CNRS, IRD, Ifremer, LEMAR, 29280 Plouzane, France
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Short summary
The remineralisation proxy, barite, was measured along 30°E in the southern Indian Ocean during early austral winter. To our knowledge this is the first reported Southern Ocean winter study. Concentrations throughout the water column were comparable to observations during spring to autumn. By linking satellite primary production to this proxy a possible annual timescale is proposed. These findings also suggest possible carbon remineralisation from satellite data on a basin scale.
The remineralisation proxy, barite, was measured along 30°E in the southern Indian Ocean during...
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