Figure 4 | Scientific Reports

Figure 4

From: Using global isotopic data to constrain the role of shale gas production in recent increases in atmospheric methane

Figure 4

Increasing δ13CCH4 signature of produced and emitted gas from shale developments in the USA from 2000 to mid-2019. Only formations with sufficient isotopic data (Marcellus, Barnett, Haynesville, Permian, Eagle Ford, Fayetteville, Woodford, Niobrara-Codell and Bakken) and emission data (Marcellus, Barnett, Haynesville, Eagle Ford, Fayetteville, Niobrara-Codell and Bakken) are used to construct this figure.

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