Stationary and drone-assisted methane plume localization with dispersion spectroscopy

Soskind, M.; Li, Nathan P.; Moore, Daniel P.; Chen, Yifeng; Wendt, Lars; McSpiritt, James; Zondlo, M. A.; Wysocki, Gerard

doi:10.1016/j.rse.2023.113513

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…Once the presence of an emissions source is detected with a horizontal scan, additional flights can be used for emissions quantification as discussed below. Further localization can be accomplished with more complex flight patterns (Soskind et al, 2023).…”

Section: Survey Scan For Emissions Detectionmentioning

confidence: 99%

“…Long open-path measurements to a UAV were very recently used in conjunction with a Gaussian plume model to determine an emission rate from a point source (Soskind et al, 2023). Finally, several mass-balance approaches have been demonstrated using column-integrated measurements including solar-occultation flux (which can only be used during daytime/sunny conditions) (Kille et al, 2017;Mellqvist et al, 2010) and airborne LiDAR (which has only been demonstrated for a few gases) (Ravikumar et al, 2019;Amediek et al, 2017;Bell et al, 2022;Kunkel et al, 2023).…”

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confidence: 99%

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Ground-to-UAV, laser-based, multi-species emissions quantification at long standoff distances

Cossel

Waxman

Hoenig

et al. 2023

Preprint

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Abstract. Determination of trace gas emissions from sources is critical for understanding and regulating air quality and climate change. Here, we demonstrate a method for rapid quantification of the emission rate of multiple gases from simple and complex sources using a mass-balance approach with a spatially scannable open-path sensor – in this case, an open-path dual-comb spectrometer. The open-path spectrometer measures the total column density of gases between the spectrometer and a retroreflector mounted on an unmanned aerial vehicle (UAV). By measuring slant columns at multiple UAV altitudes downwind of a source (or sink), the total emission rate can be rapidly determined without the need for an atmospheric dispersion model. Here, we demonstrate this technique using controlled releases of CH4 and C2H2. We show an emission rate determination to within 50 % of the known flux with a single 10-minute flight and within 10 % of the known flux after 10 flights. Furthermore, we estimate a detection limit for CH4 emissions to be 0.03 g CH4/s. This detection limit is approximately the same as the emissions from 25 head of beef cattle and is less than the average emissions from a small oil field pneumatic controller. Other gases including CO2, NH3, HDO, ethane, formaldehyde (HCHO), CO, and N2O can be measured by simply changing the dual-comb spectrometer.

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Section: Survey Scan For Emissions Detectionmentioning

confidence: 99%