Comparison of different characteristic timescales, plotted vs. temperature for the experiments listed in Table 1: CO₂ reactant decay (circle), AC production (square), and ASW structural evolution (cross). The typical uncertainty on each timescale is illustrated for T = 125 K (the uncertainty is similar for other temperatures). The crystallization timescales derived from measurements by FaureIcar15 (FaureIcar15; dashed line) and SmithJPCA11 (SmithJPCA11; solid line) are also depicted, along with their respective uncertainties.