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Sustained and intensified lacustrine methane cycling during Early Permian climate warming

Author

Listed:
  • Funing Sun

    (Nanjing University
    Nanjing University)

  • Wenxuan Hu

    (Nanjing University
    Nanjing University)

  • Jian Cao

    (Nanjing University
    Nanjing University)

  • Xiaolin Wang

    (Nanjing University
    Nanjing University)

  • Zhirong Zhang

    (Petroleum Exploration and Production Research Institute, SINOPEC)

  • Jahandar Ramezani

    (Massachusetts Institute of Technology)

  • Shuzhong Shen

    (Nanjing University
    Nanjing University)

Abstract

Lakes are a major emitter of the atmospheric greenhouse gas methane (CH4); however, their roles in past climate warming episodes remain poorly understood owing to a scarcity of geological records. Here we report the occurrence of sustained and intensified microbial CH4 cycling in paleo-Lake Junggar in northwestern China, one of the largest known Phanerozoic lakes, during Early Permian climate warming. High-precision U-Pb geochronology refines the age of the upper Lucaogou Formation to the Artinskian, which marks a major glacial-to-postglacial climate transition. The 13C-enriched authigenic dolomites indicate active methanogenesis in the anoxic lake sediments, and 13C-depleted hopanes suggest vigorous methanotrophy in the water column. The intensification of CH4 cycling coincided with increasing global temperature, as evidenced from elevated continental chemical weathering. Our results suggest that the lacustrine CH4 emissions acted as a positive feedback to global warming and contributed to the demise of the Late Paleozoic Ice Age.

Suggested Citation

  • Funing Sun & Wenxuan Hu & Jian Cao & Xiaolin Wang & Zhirong Zhang & Jahandar Ramezani & Shuzhong Shen, 2022. "Sustained and intensified lacustrine methane cycling during Early Permian climate warming," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32438-2
    DOI: 10.1038/s41467-022-32438-2
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    References listed on IDEAS

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    1. Richard D. Pancost & David S. Steart & Luke Handley & Margaret E. Collinson & Jerry J. Hooker & Andrew C. Scott & Nathalie V. Grassineau & Ian J. Glasspool, 2007. "Increased terrestrial methane cycling at the Palaeocene–Eocene thermal maximum," Nature, Nature, vol. 449(7160), pages 332-335, September.
    2. Yizhu Zhu & Kevin J. Purdy & Özge Eyice & Lidong Shen & Sarah F. Harpenslager & Gabriel Yvon-Durocher & Alex J. Dumbrell & Mark Trimmer, 2020. "Disproportionate increase in freshwater methane emissions induced by experimental warming," Nature Climate Change, Nature, vol. 10(7), pages 685-690, July.
    3. H. Marotta & L. Pinho & C. Gudasz & D. Bastviken & L. J. Tranvik & A. Enrich-Prast, 2014. "Greenhouse gas production in low-latitude lake sediments responds strongly to warming," Nature Climate Change, Nature, vol. 4(6), pages 467-470, June.
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