Articles | Volume 18, issue 5
Biogeosciences, 18, 1823–1838, 2021
https://doi.org/10.5194/bg-18-1823-2021
Biogeosciences, 18, 1823–1838, 2021
https://doi.org/10.5194/bg-18-1823-2021
Research article
16 Mar 2021
Research article | 16 Mar 2021

Warming and ocean acidification may decrease estuarine dissolved organic carbon export to the ocean

Michelle N. Simone et al.

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Short summary
Estuaries are responsible for a large contribution of dissolved organic carbon (DOC) to the global C cycle, but it is unknown how this will change in the future. DOC fluxes from unvegetated sediments were investigated ex situ subject to conditions of warming and ocean acidification. The future climate shifted sediment fluxes from a slight DOC source to a significant sink, with global coastal DOC export decreasing by 80 %. This has global implications for C cycling and long-term C storage.
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