Table 1
Hydrocarbon column abundances at p < 10 mbar versus Spitzer observational results (Orton et al. 2014b).
| Species | Spitzer | This model |
|---|---|---|
| (cm−2) | (cm−2) | |
| CH4 | 4.5 ± 1.1 × 1019 | 4.3 × 1019 |
| C2H2 | 6.2 ± 1.1 × 1016 | 4.8 × 1016 |
| C2H6 | 3.1 ± 0.4 × 1016 | 1.7 × 1017 |
| CH3C2H | 8.6 ± 1.6 × 1013 | 4.1 × 1011 |
| C4H2 | 1.8 ± 0.3 × 1013 | 9.3 × 1011 |
| CH3 | <3.3 × 1012 | 4.4 × 1012 |
Notes. The derived column abundances of stratospheric species result from the nominal model in Orton et al. (2014b) and the uncertainties represent the spectral fitting uncertainty and the uncertainty derived from the range of acceptable methane mixing ratios and eddy diffusion coefficients.
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