Articles | Volume 19, issue 13
https://doi.org/10.5194/bg-19-3209-2022
https://doi.org/10.5194/bg-19-3209-2022
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

Related authors

Seasonal development of iron limitation in the sub-Antarctic zone
Thomas J. Ryan-Keogh, Sandy J. Thomalla, Thato N. Mtshali, Natasha R. van Horsten, and Hazel J. Little
Biogeosciences, 15, 4647–4660, https://doi.org/10.5194/bg-15-4647-2018,https://doi.org/10.5194/bg-15-4647-2018, 2018
Short summary

Related subject area

Biogeochemistry: Open Ocean
Inadequacies in the representation of sub-seasonal phytoplankton dynamics in Earth system models
Madhavan Girijakumari Keerthi, Olivier Aumont, Lester Kwiatkowski, and Marina Levy
Biogeosciences, 22, 2163–2180, https://doi.org/10.5194/bg-22-2163-2025,https://doi.org/10.5194/bg-22-2163-2025, 2025
Short summary
Composite model-based estimate of the ocean carbon sink from 1959 to 2022
Jens Terhaar
Biogeosciences, 22, 1631–1649, https://doi.org/10.5194/bg-22-1631-2025,https://doi.org/10.5194/bg-22-1631-2025, 2025
Short summary
Phytoplankton community structure in relation to iron and macronutrient fluxes from subsurface waters in the western North Pacific during summer
Huailin Deng, Koji Suzuki, Ichiro Yasuda, Hiroshi Ogawa, and Jun Nishioka
Biogeosciences, 22, 1495–1508, https://doi.org/10.5194/bg-22-1495-2025,https://doi.org/10.5194/bg-22-1495-2025, 2025
Short summary
Intense and localized export of selected marine snow types at eddy edges in the South Atlantic Ocean
Alexandre Accardo, Rémi Laxenaire, Alberto Baudena, Sabrina Speich, Rainer Kiko, and Lars Stemmann
Biogeosciences, 22, 1183–1201, https://doi.org/10.5194/bg-22-1183-2025,https://doi.org/10.5194/bg-22-1183-2025, 2025
Short summary
Spatial distributions of iron and manganese in surface waters of the Arctic's Laptev and East Siberian seas
Naoya Kanna, Kazutaka Tateyama, Takuji Waseda, Anna Timofeeva, Maria Papadimitraki, Laura Whitmore, Hajime Obata, Daiki Nomura, Hiroshi Ogawa, Youhei Yamashita, and Igor Polyakov
Biogeosciences, 22, 1057–1076, https://doi.org/10.5194/bg-22-1057-2025,https://doi.org/10.5194/bg-22-1057-2025, 2025
Short summary

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, https://doi.org/10.16943/ptinsa/2017/48960, 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, https://doi.org/10.1016/j.dsr2.2014.05.012, 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, https://doi.org/10.1016/j.dsr2.2008.11.032, 2009. 
Barbur, V. A., Montgomery, D. C., and Peck, E. A.: Introduction to Linear Regression Analysis, Stat., 43, 339, https://doi.org/10.2307/2348362, 1994. 
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, https://doi.org/10.1029/2004GB002299, 2005. 
Download
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.
Share
Altmetrics
Final-revised paper
Preprint