Articles | Volume 18, issue 15
Biogeosciences, 18, 4651–4679, 2021
https://doi.org/10.5194/bg-18-4651-2021
Biogeosciences, 18, 4651–4679, 2021
https://doi.org/10.5194/bg-18-4651-2021
Research article
13 Aug 2021
Research article | 13 Aug 2021

New insights into large-scale trends of apparent organic matter reactivity in marine sediments and patterns of benthic carbon transformation

Felipe S. Freitas et al.

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Cited articles

Aguilera, D. R., Jourabchi, P., Spiteri, C., and Regnier, P.: A knowledge-based reactive transport approach for the simulation of biogeochemical dynamics in Earth systems, Geochem. Geophy. Geosy., 6, 1–18, https://doi.org/10.1029/2004GC000899, 2005. 
Aller, R. C.: Diagenetic Processes Near the Sediment-Water Interface of Long Island Sound, I., in: Advances in Geophysics, Vol. 22, Elsevier, 237–350, https://doi.org/10.1016/S0065-2687(08)60067-9, 1980. 
Aller, R. C.: Bioturbation and remineralization of sedimentary organic matter: effects of redox oscillation, Chem. Geol., 114, 331–345, https://doi.org/10.1016/0009-2541(94)90062-0, 1994. 
Aller, R. C. and Aller, J. Y.: The effect of biogenic irrigation intensity and solute exchange on diagenetic reaction rates in marine sediments, J. Mar. Res., 56, 905–936, https://doi.org/10.1357/002224098321667413, 1998. 
Aller, R. C. and Cochran, J. K.: The Critical Role of Bioturbation for Particle Dynamics, Priming Potential, and Organic C Remineralization in Marine Sediments: Local and Basin Scales, Front. Earth Sci., 7, 157, https://doi.org/10.3389/feart.2019.00157, 2019. 
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It remains challenging to fully understand what controls carbon burial in marine sediments globally. Thus, we use a model–data approach to identify patterns of organic matter reactivity at the seafloor across distinct environmental conditions. Our findings support the notion that organic matter reactivity is a dynamic ecosystem property and strongly influences biogeochemical cycling and exchange. Our results are essential to improve predictions of future changes in carbon cycling and climate.
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