Title: Review of "Dispersion in deep polar firn driven by synoptic-scale surface pressure variability" by Christo Buizert and Jeffrey P. Severinghaus
Abstract: This paper makes a convincing case for the existence, cause and magnitude of dispersion in deep polar firn.Dispersion in deep firn is an unresolved issue that needed further study, and this paper meets that need very well.It is well written and I recommend publication after consideration of the following comments.Specific comments: 1) Page 1, line 27 (Fig 1): Please clarify whether the molecular diffusivity for the 'no LIZ mixing' case shown in blue was tuned to the available observations, or simply the same as the other case but run without any LIZ mixing?C1