Poultry farm ML downwind measurements. Time series of measurements collected downwind of a poultry farm at which the ML performed three successive downwind transects. CH₄ (red, blue and turquoise) is from the CRDS and C₂H₆ (green) from the TILDAS. Peak CH₄ enhancements are on the order of 10 ppb, not a significant enhancement compared to the 50 ppb threshold used for this study and the levels detected downwind of NG facility plumes. DOI: https://doi.org/10.1525/elementa.351.f6