Articles | Volume 13, issue 9
Biogeosciences, 13, 2823–2848, 2016
https://doi.org/10.5194/bg-13-2823-2016

Special issue: Data assimilation in carbon/biogeochemical cycles: consistent...

Biogeosciences, 13, 2823–2848, 2016
https://doi.org/10.5194/bg-13-2823-2016

Research article 13 May 2016

Research article | 13 May 2016

A probabilistic assessment of calcium carbonate export and dissolution in the modern ocean

Gianna Battaglia et al.

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The marine cycle of calcium carbonate (CaCO3) influences the distribution of CO2 between atmosphere and ocean, and thereby climate. We constrain export of biogenic CaCO3 (globally: 0.72–1.05 Gt C yr−1) and dissolution within the water column (~ 80 %) in a novel Monte Carlo set-up with the Bern3D model based on alkalinity data. Whether CaCO3 dissolves in the upper ocean remains unresolved. We recommend using constant (saturation-independent) dissolution rates in Earth system models.
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