Fig. 3: Site-level and regional model-data comparison of wetland δ13C-CH4. | Communications Earth & Environment

Fig. 3: Site-level and regional model-data comparison of wetland δ13C-CH4.

From: Improved global wetland carbon isotopic signatures support post-2006 microbial methane emission increase

Fig. 3

a, b Site-level model-data comparison of observations with (a) Ganesan et al.23 and (b) temporally-varying isoTEM. c–e Regional model-data comparison of simulated wetland δ13C-CH4 in Alaska by (c) Ganesan et al.23 and (d) isoTEM, and (e) their comparison with observation-based source signatures from NOAA aircraft measurements. The source signature is derived using Miller-Tans plots39. All observation data used for site-level comparison are listed in Supplementary Data 1. Error bars for observations in (a, b, e) represent one standard deviation of measured/inferred wetland δ13C-CH4. Error bars for isoTEM in panel e represent one standard deviation determined from 20 ensemble simulations where the optimized parameters were varied.

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