University of California Press

Figure 2

Sample of the time series with multiple plume transects collected with the tracer flux method. Measured mixing ratios (left) of C2H6 (pink) CH4 (dark yellow) and N2O (green) show correlated increases during each site transect. A time-aligned correlation plot (right) of CH4 vs N2O shows the linear fits (molar ratios) used for quantification (each individual site transect colored differently). Range of molar ratios shown in the plot is 3.7 ± 0.06 (R2 = 0.97) to 5.3 ± 0.1 (R2 = 0.98); with a mean of 4.4 ± 0.6 (1-sigma uncertainty). Nominal flow rate of N2O (tracer) = 10 SLPM @ T = 298 K. Emission rate for the site shown in this figure = 1.7 kg CH4 h–1 (1.6–1.9 kg CH4 h–1). DOI: https://doi.org/10.1525/elementa.284.f2

Sample of the time series with multiple plume transects collected with the tracer flux method. Measured mixing ratios (left) of C₂H₆ (pink) CH₄ (dark yellow) and N₂O (green) show correlated increases during each site transect. A time-aligned correlation plot (right) of CH₄ vs N₂O shows the linear fits (molar ratios) used for quantification (each individual site transect colored differently). Range of molar ratios shown in the plot is 3.7 ± 0.06 (R² = 0.97) to 5.3 ± 0.1 (R² = 0.98); with a mean of 4.4 ± 0.6 (1-sigma uncertainty). Nominal flow rate of N₂O (tracer) = 10 SLPM @ T = 298 K. Emission rate for the site shown in this figure = 1.7 kg CH₄ h^–1 (1.6–1.9 kg CH₄ h^–1). DOI: https://doi.org/10.1525/elementa.284.f2

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