Pyrite sulfur isotopes constrained by sedimentation rates: Evidence from sediments on the East China Sea inner shelf since the late Pleistocene

Controls on Organic Carbon Burial in the Eastern China Marginal Seas: A Regional Synthesis

electronic distribution is not permitted. Zhao, B., Yao, P., Bianchi, T. S., Shields, M. R., Cui, X. Q., Zhang, X. W., et al. (2018). The role of reactive Iron in the preservation of terrestrial organic carbon in estuarine sediments. Journal of Geophysical Research: Biogeosciences, 123, 3556–3569, 10.1029/2018JG004649. To view the published open abstract, go to https://doi.org/10.1029/2018JG004649

https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018JG004649

The Role of Reactive Iron in the Preservation of Terrestrial Organic Carbon in Estuarine Sediments

Continental shelf sediments are recognized as long-term stores of globally significant quantities of carbon (C) and potentially provide an important, yet largely overlooked climate regulation service via the Earth’s C cycle. Current understanding of the spatial distribution of sedimentary C across continental shelves remains poor, inhibiting the targeted management and potential inclusion of these globally significant C stores into national C budgets. Further understanding of the spatial heterogeneity of continental shelf sediments and associated C provides a foundation to quantify the organic carbon (OC) stock and better understand the role that marine sediments play in regulating the global climate and the potential for CO2 to be released through anthropogenic disturbance of these C stores. Utilizing a spectrum of available marine data, we have created bespoke sediment maps that quantify the surficial (top 10 cm) OC stock and highlight significant spatial heterogeneity in the distribution of sediments and their associated C content across the United Kingdom’s Exclusive Economic Zone (EEZ). The surficial sediments within the UK EEZ are estimated to store 524 ± 68 Mt of organic carbon (OC) and 2,582 ± 168 Mt of inorganic carbon (IC). The spatial mapping of this C highlights well-defined OC accumulation hotspots in fjords, estuaries and coastal muds, while large accumulations of IC are found in the tidally swept areas around Orkney, Shetland and the South West of England. Within the well-defined OC hotspots, muddy sediments store the greatest quantity of OC; the muds offer potentially valuable opportunities for targeted future management and protection of sedimentary C stores within the UK EEZ. In the future, if areas of the seafloor were to be managed to include the protection of these valuable sedimentary C resources, we recommend an initial focus on hotspots of high sedimentary OC density.

/pdf/marine-sedimentary-carbon-stocks-of-the-united-kingdom-s-36mdw15ve4.pdf

Marine Sedimentary Carbon Stocks of the United Kingdom's Exclusive Economic Zone.

Hypoxia, acidification and nutrient accumulation in the Yellow Sea Cold Water of the South Yellow Sea.

The Remineralization of Sedimentary Organic Carbon in Different Sedimentary Regimes of the Yellow and East China Seas

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The Remineralization of Sedimentary Organic Carbon in Different Sedimentary Regimes of the Yellow and East China Seas