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May 22, 2026Communications Earth & EnvironmentOpen Access

Neglected shoreward reintroduction of pre-aged sedimentary organic carbon in a large river- and tide-dominated marginal sea

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Authors

LCLilei ChenFLFeng LiJLJian Liu

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Overview

Randomized trial examines sedimentary organic carbon dynamics in the East China Sea, indicating reintroduction from offshore areas.

Key Points

  • This research aims to investigate the variability and characteristics of sedimentary organic carbon in the East China Sea over the past 14,000 years.
  • Analysis of sediment core ECS-1302 from the East China Sea's muddy belt to assess sedimentary organic carbon characteristics.
  • Utilization of dual carbon isotopes (13C and 14C) and multi-biomarker analysis to understand sedimentary environments.
  • Investigation of temporal heterogeneity in sedimentary organic carbon during postglacial deposition.
  • Sedimentary organic carbon ages showed significant deviations from depositional ages, indicating unusual reintroduction processes.
  • A decreasing fraction of terrestrial organic carbon was observed, suggesting offshore reintroduction of pre-aged organic carbon due to energetic forces.
  • Findings imply that sedimentary organic carbon dynamics involve dual-directional cycles, challenging traditional models of sediment dispersal.

Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/6a0ff2a8d674f7c03778b33ahttps://doi.org/10.1038/s43247-026-03645-2
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