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Table 1

Global bottom-up geo-CH4 emission estimates (Tg yr–1) from literature. DOI: https://doi.org/10.1525/elementa.383.t1

ReferenceTg yr–1

 
Etiope and Klusman (2002) 30–70  
Judd et al. (2002) 13–36 microseepage not included 
Kvenvolden and Rogers (2005) 45  
Etiope et al. (2008) 42–64  
Etiope (2015) 45–76  
Etiope et al. (2019) 43–50 extrapolation from grid maps 
ReferenceTg yr–1

 
Etiope and Klusman (2002) 30–70  
Judd et al. (2002) 13–36 microseepage not included 
Kvenvolden and Rogers (2005) 45  
Etiope et al. (2008) 42–64  
Etiope (2015) 45–76  
Etiope et al. (2019) 43–50 extrapolation from grid maps 
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