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Seepage from an arctic shallow marine gas hydrate reservoir is insensitive to momentary ocean warming

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  • Wei-Li Hong

    (CAGE—Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway
    Present address: Geological Survey of Norway, 7491 Trondheim, Norway)

  • Marta E. Torres

    (CEOAS, Oregon State University)

  • JoLynn Carroll

    (CAGE—Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway
    Akvaplan-niva AS, Fram Centre)

  • Antoine Crémière

    (Geological Survey of Norway
    Present address: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA)

  • Giuliana Panieri

    (CAGE—Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway)

  • Haoyi Yao

    (CAGE—Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway)

  • Pavel Serov

    (CAGE—Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway)

Abstract

Arctic gas hydrate reservoirs located in shallow water and proximal to the sediment-water interface are thought to be sensitive to bottom water warming that may trigger gas hydrate dissociation and the release of methane. Here, we evaluate bottom water temperature as a potential driver for hydrate dissociation and methane release from a recently discovered, gas-hydrate-bearing system south of Spitsbergen (Storfjordrenna, ∼380 m water depth). Modelling of the non-steady-state porewater profiles and observations of distinct layers of methane-derived authigenic carbonate nodules in the sediments indicate centurial to millennial methane emissions in the region. Results of temperature modelling suggest limited impact of short-term warming on gas hydrates deeper than a few metres in the sediments. We conclude that the ongoing and past methane emission episodes at the investigated sites are likely due to the episodic ventilation of deep reservoirs rather than warming-induced gas hydrate dissociation in this shallow water seep site.

Suggested Citation

  • Wei-Li Hong & Marta E. Torres & JoLynn Carroll & Antoine Crémière & Giuliana Panieri & Haoyi Yao & Pavel Serov, 2017. "Seepage from an arctic shallow marine gas hydrate reservoir is insensitive to momentary ocean warming," Nature Communications, Nature, vol. 8(1), pages 1-14, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15745
    DOI: 10.1038/ncomms15745
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    Cited by:

    1. Alicia M. Wilson & Andrew Osborne & Scott M. White, 2024. "Large-scale groundwater flow and sedimentary diagenesis in continental shelves influence marine chemical budgets," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Liang, Jianzhen & Feng, Jing-Chun & Chen, Xiao & Li, Cun & Zhang, Si, 2024. "Increasing temperature and sulfate enhances the efficiency of methane abatement in an anaerobic oxidation of methane bioreactor (AOMB) system," Applied Energy, Elsevier, vol. 362(C).
    3. Scott A. Klasek & Wei-Li Hong & Marta E. Torres & Stella Ross & Katelyn Hostetler & Alexey Portnov & Friederike Gründger & Frederick S. Colwell, 2021. "Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
    4. Iván Vargas-Cordero & Umberta Tinivella & Lucía Villar-Muñoz & Joaquim P. Bento, 2018. "High Gas Hydrate and Free Gas Concentrations: An Explanation for Seeps Offshore South Mocha Island," Energies, MDPI, vol. 11(11), pages 1-13, November.

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