Comparison between modeled and observed methanol. Upper panel: abundance of methanol ices obtained by our chemical model as a function of density (solid lines; see text and Table 2 for details on the model sets). The black points (with uncertainties) are the observed values at the four positions probed by Boogert et al. (2011). Red and orange curves overlap as well as the green and blue curves. Lower panel: gas-to-ice abundance ratios of methanol as a function of density obtained by the different sets of models for the best times (solid lines) and the four observation points (black dots).