Methane is an important greenhouse gas that is 20 times more potent than CO 2. Urban environments have been shown to be significant sources of methane with emissions much larger than currently reported in inventories. This discrepancy suggests that there remain a number of insufficiently characterized methane sources in urban environments. Using cavity ring-down spectroscopy, flask sampling, and a mass balance approach, we determined methane emission fluxes downwind from the city of Indianapolis with an aircraft-based platform. Emission rates from specific sources of methane (e.g. landfill and wastewater treatment plants) were investigated to determine the importance of each source to the total area-wide emission flux. As part of a collaborative effort called the Indianapolis Flux Experiment (INFLUX), this study will help us gain understanding of the magnitude of source-specific methane emissions as well as the potential energy equivalent of these biogas emissions should they be captured to generate heat or electricity.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)