Comparison of thermal emission spectra for a reduced vs. an oxidized mantle during the BOM presented for scenario 1.1 (upper panel), 1.2 (middle panel), and 1.3 (lower panel) of Table 4. The output of the volatile speciation model is shown in the legend. Values written above the legend show the initial input values to the speciation model. Reference blackbody curves for four different temperatures are plotted. Absorption features ofkey chemical species are indicated. The spectra shown here have been binned to a resolution of λ∕Δλ = 1000.