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Freshwater lake to salt-water sea causing widespread hydrate dissociation in the Black Sea

Author

Listed:
  • Vincent Riboulot

    (IFREMER)

  • Stephan Ker

    (IFREMER)

  • Nabil Sultan

    (IFREMER)

  • Yannick Thomas

    (IFREMER)

  • Bruno Marsset

    (IFREMER)

  • Carla Scalabrin

    (IFREMER)

  • Livio Ruffine

    (IFREMER)

  • Cédric Boulart

    (IFREMER)

  • Gabriel Ion

    (National Institute of Marine Geology and Geo-ecology)

Abstract

Gas hydrates, a solid established by water and gas molecules, are widespread along the continental margins of the world. Their dynamics have mainly been regarded through the lens of temperature-pressure conditions. A fluctuation in one of these parameters may cause destabilization of gas hydrate-bearing sediments below the seafloor with implications in ocean acidification and eventually in global warming. Here we show throughout an example of the Black Sea, the world’s most isolated sea, evidence that extensive gas hydrate dissociation may occur in the future due to recent salinity changes of the sea water. Recent and forthcoming salt diffusion within the sediment will destabilize gas hydrates by reducing the extension and thickness of their thermodynamic stability zone in a region covering at least 2800 square kilometers which focus seepages at the observed sites. We suspect this process to occur in other world regions (e.g., Caspian Sea, Sea of Marmara).

Suggested Citation

  • Vincent Riboulot & Stephan Ker & Nabil Sultan & Yannick Thomas & Bruno Marsset & Carla Scalabrin & Livio Ruffine & Cédric Boulart & Gabriel Ion, 2018. "Freshwater lake to salt-water sea causing widespread hydrate dissociation in the Black Sea," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-017-02271-z
    DOI: 10.1038/s41467-017-02271-z
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    Cited by:

    1. Mao, Peixiao & Wu, Nengyou & Wan, Yizhao & Hu, Gaowei & Wang, Xingxing, 2023. "Optimization of a multi-fractured multilateral well network in advantageous structural positions of ultralow-permeability hydrate reservoirs," Energy, Elsevier, vol. 268(C).

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