Examples of absorption profiles of the 4232 Å line of CH⁺ computed along the x-axis across the standard simulation (see Table 1). The black histograms are the computed spectra. The colored curves are the results of a multi-Gaussian fit applied to the line opacity and display the individual Gaussian components (dashed red curves) and their sum (solid blue curves). The spectra are classified in increasing order of their maximum opacity (from top to bottom) and in increasing order of the number of Gaussian components used in the fit (from left to right).