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

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Latest update: 14 Apr 2024
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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.
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