The reply to the reviewer comments is adequate and I am thus inviting the authors to submit an accordingly revised version of their manuscript.

Concerning the change of the title in response to a comment by reviewer #1 I personally think the new title is awkward. In particular I am wondering whether the terms in parenthesis, i.e. (-8 degC) and (3580 m a.s.l.), are really needed in the title. Maybe the authors can spend some further thoughts on the title.

The two reviewers suggested that minor revisions are necessary to make the ms ready for publication and I agree. The author have responded reasonably to the reviewer comments and have revised their ms accordingly. I am thus accepting the ms for publication in BG.
The only change that I am asking for, not requiring further editor assessment, is that the authors modify the x-axis of Figure 1 to indicate that there is a non-linearity in the axis between September 2013 and May 2014 - typically this would be done by breaking the x-axis line with a "//" or similar.