Articles | Volume 19, issue 9
https://doi.org/10.5194/bg-19-2523-2022
https://doi.org/10.5194/bg-19-2523-2022
Research article
 | 
16 May 2022
Research article |  | 16 May 2022

Drought recorded by Ba∕Ca in coastal benthic foraminifera

Inda Brinkmann, Christine Barras, Tom Jilbert, Tomas Næraa, K. Mareike Paul, Magali Schweizer, and Helena L. Filipsson

Related authors

Revisiting the applicability and constraints of molybdenum- and uranium-based paleo redox proxies: comparing two contrasting sill fjords
K. Mareike Paul, Martijn Hermans, Sami A. Jokinen, Inda Brinkmann, Helena L. Filipsson, and Tom Jilbert
Biogeosciences, 20, 5003–5028, https://doi.org/10.5194/bg-20-5003-2023,https://doi.org/10.5194/bg-20-5003-2023, 2023
Short summary

Related subject area

Biogeochemistry: Coastal Ocean
Evaluating ocean alkalinity enhancement as a carbon dioxide removal strategy in the North Sea
Feifei Liu, Ute Daewel, Jan Kossack, Kubilay Timur Demir, Helmuth Thomas, and Corinna Schrum
Biogeosciences, 22, 3699–3719, https://doi.org/10.5194/bg-22-3699-2025,https://doi.org/10.5194/bg-22-3699-2025, 2025
Short summary
Spring–neap tidal cycles modulate the strength of the carbon source at the estuary–coast interface
Vlad A. Macovei, Louise C. V. Rewrie, Rüdiger Röttgers, and Yoana G. Voynova
Biogeosciences, 22, 3375–3396, https://doi.org/10.5194/bg-22-3375-2025,https://doi.org/10.5194/bg-22-3375-2025, 2025
Short summary
Spatiotemporal variations in surface marine carbonate system properties across the western Mediterranean Sea using volunteer observing ship data
David Curbelo-Hernández, David González-Santana, Aridane G. González, J. Magdalena Santana-Casiano, and Melchor González-Dávila
Biogeosciences, 22, 3329–3356, https://doi.org/10.5194/bg-22-3329-2025,https://doi.org/10.5194/bg-22-3329-2025, 2025
Short summary
Amplified bottom water acidification rates on the Bering Sea shelf from 1970–2022
Darren J. Pilcher, Jessica N. Cross, Natalie Monacci, Linquan Mu, Kelly A. Kearney, Albert J. Hermann, and Wei Cheng
Biogeosciences, 22, 3103–3125, https://doi.org/10.5194/bg-22-3103-2025,https://doi.org/10.5194/bg-22-3103-2025, 2025
Short summary
Depositional controls and budget of organic carbon burial in fine-grained sediments of the North Sea – the Helgoland Mud Area as a natural laboratory
Daniel Müller, Bo Liu, Walter Geibert, Moritz Holtappels, Lasse Sander, Elda Miramontes, Heidi Taubner, Susann Henkel, Kai-Uwe Hinrichs, Denise Bethke, Ingrid Dohrmann, and Sabine Kasten
Biogeosciences, 22, 2541–2567, https://doi.org/10.5194/bg-22-2541-2025,https://doi.org/10.5194/bg-22-2541-2025, 2025
Short summary

Cited articles

Alve, E. and Bernhard, J. M.: Vertical migratory response of benthic foraminifera to controlled oxygen concentrations in an experimental mesocosm, Mar. Ecol. Prog. Ser., 116, 137–151, 1995. 
Arneborg, L.: Turnover times for the water above sill level in Gullmar Fjord, Cont. Shelf Res., 24, 443–460, https://doi.org/10.1016/j.csr.2003.12.005, 2004. 
Bahr, A., Schönfeld, J., Hoffmann, J., Voigt, S., Aurahs, R., Kucera, M., Flögel, S., Jentzen, A., and Gerdes, A.: Comparison of Ba/Ca and δ18O as freshwater proxies: A multi-species core-top study on planktonic foraminifera from the vicinity of the Orinoco River mouth, Earth Planet Sc. Lett., 383, 45–57, https://doi.org/10.1016/j.epsl.2013.09.036, 2013. 
Balistrieri, L. S. and Murray, J. W.: The surface chemistry of sediments from the Panama Basin: The influence of Mn oxides on metal adsorption, Geochim. Cosmochim. Ac., 50, 2235–2243, https://doi.org/10.1016/0016-7037(86)90078-5, 1986. 
Barras, C., Aurélia, M., Pia, N. M., Edouard, M., Jassin, P., Carole, L., Filipsson, H. L., and Frans, J.: Experimental calibration of manganese incorporation in foraminiferal calcite, Geochim. Cosmochim. Ac., 237, 49–64, https://doi.org/10.1016/j.gca.2018.06.009, 2018. 
Download
Short summary
The concentration of the trace metal barium (Ba) in coastal seawater is a function of continental input, such as riverine discharge. Our geochemical records of the severely hot and dry year 2018, and following wet year 2019, reveal that prolonged drought imprints with exceptionally low Ba concentrations in benthic foraminiferal calcium carbonates of coastal sediments. This highlights the potential of benthic Ba / Ca to trace past climate extremes and variability in coastal marine records.
Share
Altmetrics
Final-revised paper
Preprint