Extreme Methane Emissions from a Swiss Hydropower Reservoir: Contribution from Bubbling Sediments
作者： Tonya DelSontro , Daniel F. McGinnis , Sebastian Sobek , Ilia Ostrovsky , Bernhard Wehrli
DOI: 10.1021/ES9031369
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摘要: Methane emission pathways and their importance were quantified during a yearlong survey of temperate hydropower reservoir. Measurements using gas traps indicated very high ebullition rates, but due to the stochastic nature mass balance approach was crucial deduce system-wide methane sources losses. diffusion from sediment generally low seasonally stable did not account for concentration dissolved measured in reservoir discharge. A strong positive correlation between water temperature observed enabled us quantify addition bubble dissolution balance. Finally, knowing contribution dissolution, we used model estimate directly atmosphere. Our results that total Lake Wohlen on average >150 mg CH4 m−2 d−1, which is highest ever documented midlati...
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