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A global assessment of the mixed layer in coastal sediments and implications for carbon storage

Author

Listed:
  • Shasha Song

    (Ocean University of China
    Qingdao National Laboratory for Marine Science and Technology
    Ocean University of China)

  • Isaac R. Santos

    (University of Gothenburg
    Southern Cross University)

  • Huaming Yu

    (Ocean University of China
    Ocean University of China)

  • Faming Wang

    (Chinese Academy of Sciences)

  • William C. Burnett

    (Florida State University)

  • Thomas S. Bianchi

    (University of Florida)

  • Junyu Dong

    (Ocean University of China)

  • Ergang Lian

    (Tongji University)

  • Bin Zhao

    (Ocean University of China
    Qingdao National Laboratory for Marine Science and Technology)

  • Lawrence Mayer

    (University of Maine, Walpole)

  • Qingzhen Yao

    (Ocean University of China
    Qingdao National Laboratory for Marine Science and Technology)

  • Zhigang Yu

    (Ocean University of China
    Qingdao National Laboratory for Marine Science and Technology)

  • Bochao Xu

    (Ocean University of China
    Qingdao National Laboratory for Marine Science and Technology)

Abstract

The sediment-water interface in the coastal ocean is a highly dynamic zone controlling biogeochemical fluxes of greenhouse gases, nutrients, and metals. Processes in the sediment mixed layer (SML) control the transfer and reactivity of both particulate and dissolved matter in coastal interfaces. Here we map the global distribution of the coastal SML based on excess 210Pb (210Pbex) profiles and then use a neural network model to upscale these observations. We show that highly dynamic regions such as large estuaries have thicker SMLs than most oceanic sediments. Organic carbon preservation and SMLs are inversely related as mixing stimulates oxidation in sediments which enhances organic matter decomposition. Sites with SML thickness >60 cm usually have lower organic carbon accumulation rates (

Suggested Citation

  • Shasha Song & Isaac R. Santos & Huaming Yu & Faming Wang & William C. Burnett & Thomas S. Bianchi & Junyu Dong & Ergang Lian & Bin Zhao & Lawrence Mayer & Qingzhen Yao & Zhigang Yu & Bochao Xu, 2022. "A global assessment of the mixed layer in coastal sediments and implications for carbon storage," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32650-0
    DOI: 10.1038/s41467-022-32650-0
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    References listed on IDEAS

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    Cited by:

    1. Li, Ruirui & Zhang, Luqing & Han, Zhenhua & Zhou, Jian & Wang, Song & Schüttrumpf, Holger, 2023. "Effect of interlayer mixed zone and effective stress on permeability anisotropy of NGH turbidite reservoir," Energy, Elsevier, vol. 284(C).

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