Figure 1. Last glacial maximum minus pre-industrial CH₄ emissions.

Emissions change (TgCH₄yr⁻¹) for each source term and total. Values in pink include peatland emissions in northern extra-tropics. The sum uses the standard-fire flux. Values from previous work have been scaled to the same pre-industrial fluxes as used in our study for comparison. Wetland emissions from ref. 9 (dots) based on PMIP2 coupled GCM simulations, V: Valdes et al.⁸, K: Kaplan et al.⁷,¹⁴, T: Thonicke et al.²⁹ and S: Singarayer et al.¹⁰. More details are provided in Table 1.