Comparison of geo-CH4 emission estimates (Tg yr–1) based on different data and quantification approaches. The black bar (Petrenko et al., 2017) indicates the range of mean values (including zero) from the five different periods analyzed (Younger Dryas-Preboreal transition), and the light gray bar indicates the 95% confidence interval. The remaining bars represent summary statistics from the bottom-up approach as well as from the joint probability distributions (see text) of the ethane-based top-down studies and the other top-down studies. Specifically, light gray bars represent 95% confidence intervals, and dark gray bars represent 1 standard deviation (including mean values in the center). The colored dots indicate the 95% confidence intervals of each individual study within each top-down category. * See text for estimating geo-CH4 emissions based on Saunois et al. (2016) data. DOI: https://doi.org/10.1525/elementa.383.f1
