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May 13, 2026Global Biogeochemical CyclesOpen Access

From Fjord to Shelf: Drivers of Organic Carbon Transformation and Storage Across Connected Marine Sedimentary Systems

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Authors

CSC. SmeatonWHW. HilesPGP. Gulliver

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Overview

Spatial modeling reveals organic carbon dynamics in fjords and shelf sediments, highlighting reactivity and storage potential.

Key Points

  • This research examines the mechanisms driving organic carbon transformation and storage in marine sedimentary systems.
  • Analyzed OC content, bulk isotopic composition, organic matter reactivity, particle size, and mineral surface area in sediments.
  • Focused on fjords and the continental shelf along the West coast of Scotland.
  • Developed a new dataset combined with spatial modeling to identify sedimentary depositional regions.
  • Identified five distinct sedimentary regions with differing drivers of organic carbon dynamics.
  • Outer shelf sediments showed low reactive organic carbon from aged marine sources.
  • Fjord sediments contained high reactive organic carbon from modern terrestrial sources.

Cite This Study

Smeaton et al. (2026) studied this question.

synapsesocial.com/papers/6a03cbfc1c527af8f1ecfd17https://doi.org/10.1029/2025gb008738
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