Articles | Volume 19, issue 13
Research article
11 Jul 2022
Research article |  | 11 Jul 2022

Early winter barium excess in the southern Indian Ocean as an annual remineralisation proxy (GEOTRACES GIPr07 cruise)

Natasha René van Horsten, Hélène Planquette, Géraldine Sarthou, Thomas James Ryan-Keogh, Nolwenn Lemaitre, Thato Nicholas Mtshali, Alakendra Roychoudhury, and Eva Bucciarelli

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Cited articles

Anilkumar, N. and Sabu, P.: Physical process influencing the ecosystem of the indian sector of southern ocean-An overview, Proc. Indian Natl. Sci. Acad., 83, 363–376,, 2017. 
Ansorge, I. J., Jackson, J. M., Reid, K., Durgadoo, J. V, Swart, S., and Eberenz, S.: Evidence of a southward eddy corridor in the South-West Indian ocean, Deep-Sea Res. Pt. II, 119, 69–76,, 2015. 
Armstrong, R. A., Peterson, M. L., Lee, C., and Wakeham, S. G.: Settling velocity spectra and the ballast ratio hypothesis, Deep-Sea Res. Pt. II, 56, 1470–1478,, 2009. 
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Behrenfeld, M. J., Boss, E., Siegel, D. A., and Shea, D. M.: Carbon-based ocean productivity and phytoplankton physiology from space, Global Biogeochem. Cy., 19, 1–14,, 2005. 
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.
Final-revised paper