“…Over the last several years, various atmospheric studies monitoring emissions from O&G from individual wellpads (Caulton et al, 2019;Rella et al, 2015;Robertson et al, 2017), basins (Barkley et al, 2017;Karion et al, 2013Karion et al, , 2015Peischl et al, 2015Peischl et al, , 2016Peischl et al, , 2018Pétron et al, 2012Pétron et al, , 2014, and entire regions have consistently found emission rates larger than the EPA inventory, raising concerns of a broad underestimation of leaks from the O&G sector (Alvarez et al, 2018). However, large-scale CH 4 inversion studies involving the US have not been as conclusive, with differing findings as to the accuracy of inventory emissions from O&G, animal agriculture, and wetlands (Maasakkers et al, 2019;Miller et al, 2013;Sheng et al, 2018;Yu et al, 2020). The large spread of uncertainty regarding the magnitude, spatial distribution, and seasonality of CH 4 emissions from wetlands, as well as the numerous other potential sources of CH 4 , poses a challenge to large scale studies attempting source attribution of detected CH 4 signals.…”