期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-019-13320-0
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资金
- Swiss National Science Foundation [200021_169899]
- German Research Foundation [KI-853/7-1, KI-853/11-1, KI-853/11-2]
- German Research Foundation (DFG) [GR1540/21-1+2, 23-1, BI1987/2-1, 28-1]
- German Federal Ministry of Education and Research [BMBF 01LC1501G]
- European Commission/Horizon program (H2020 project ERA-PLANET)
- Swiss National Science Foundation (SNF) [200021_169899] Funding Source: Swiss National Science Foundation (SNF)
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 km(2).
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