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Contribution of oxic methane production to surface methane emission in lakes and its global importance

Author

Listed:
  • Marco Günthel

    (Swansea University)

  • Daphne Donis

    (University of Geneva)

  • Georgiy Kirillin

    (Leibniz Institute of Freshwater Ecology and Inland Fisheries)

  • Danny Ionescu

    (Leibniz Institute of Freshwater Ecology and Inland Fisheries)

  • Mina Bizic

    (Leibniz Institute of Freshwater Ecology and Inland Fisheries)

  • Daniel F. McGinnis

    (University of Geneva)

  • Hans-Peter Grossart

    (Leibniz Institute of Freshwater Ecology and Inland Fisheries
    Potsdam University)

  • Kam W. Tang

    (Swansea University)

Abstract

Recent discovery of oxic methane production in sea and lake waters, as well as wetlands, demands re-thinking of the global methane cycle and re-assessment of the contribution of oxic waters to atmospheric methane emission. Here we analysed system-wide sources and sinks of surface-water methane in a temperate lake. Using a mass balance analysis, we show that internal methane production in well-oxygenated surface water is an important source for surface-water methane during the stratified period. Combining our results and literature reports, oxic methane contribution to emission follows a predictive function of littoral sediment area and surface mixed layer volume. The contribution of oxic methane source(s) is predicted to increase with lake size, accounting for the majority (>50%) of surface methane emission for lakes with surface areas >1 km2.

Suggested Citation

  • Marco Günthel & Daphne Donis & Georgiy Kirillin & Danny Ionescu & Mina Bizic & Daniel F. McGinnis & Hans-Peter Grossart & Kam W. Tang, 2019. "Contribution of oxic methane production to surface methane emission in lakes and its global importance," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13320-0
    DOI: 10.1038/s41467-019-13320-0
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