Figure 9:

The sensitivity of the C₂H₄ profile to the rate coefficient for reaction R134 (H + C₂H₄ + M →C₂H₅ + M) for pre-storm conditions (dotted lines) and the hot beacon core on May 4, 2011 (solid lines), for our nominal model (red) and a model in which the rate coefficient for R134 is taken from the recommendation of Li et al. (2014) (blue). The black square is our CIRS-derived C₂H₄ beacon-core abundance from May 4, 2011.