|Daniel Draebing presents the results of a series of lab- and field-based experiments to quantify thermal and ice-induced rock and fracture kinematics across a number of rock walls in Alpine Switzerland. The original two reviewers recommended revision, with Reviewer 1 in particular providing a very constructive set of suggestions. Having read the revised manuscript in detail I am satisfied that the author has addressed all major and minor concerns, and that where they have chosen to rebut a reviewer's suggested change, their defence is sound. The revised manuscript is much shorter than the original (as evidenced in the tracked-changes version, and notably in the Results section) and this has improved its clarity and impact. The key findings of the work are undoubtedly significant beyond the study site, and the hypothesis that an earlier-onset snowmelt (induced by climate change) will alter the frequency, magnitude and location of thermal and ice-induced stresses, etc, is a notable contribution to the wider field.|
I recommend the manuscript's acceptance pending one minor revision, and a series of technical corrections.
Minor revision - the Abstract states that 'Future work should quantify rockfall patterns and link these patterns to climatic drivers'. However, this recommendation is not reiterated in the Conclusion, and, as far as I can see, it is not stated clearly or developed in more detail in the Discussion. As written in the Abstract this suggestion seems like an afterthought, and I'd like to see more development/detail included in the Discussion to this effect.
L9 – ‘fractured’ should be ‘fracture’
L18 – correct to ‘on daily time scales’
L19 – correct to ‘On a seasonal scale…’
L20 – correct to ‘…ice segregation-induced fracture opening…’
L21 – change ‘irreversible’ to ‘irreversibly’
L23 – change to ‘on an annual scale’
L22 – correct to ‘..and increase temperature extremes and will, therefore, affect the number…’
L25 - I think ‘Alpine’ should be ‘alpine’. Your study is ‘Alpine’-focused, but the implications of your findings go beyond the Alps, therefore suggest you use lowercase ‘alpine’, as per line 9. Also, L30 – I think this should be ‘alpine’ too. Check remainder of manuscript – there are numerous instances of use that need checking.
The order of in-text citations needs checking and correcting throughout so that where more than one citation occurs, these are ordered by date (earliest first). There’s no logic to your system at present.
L52 – correct to ‘expansion-induced’
L84 – ‘air-dried’
L234 – ‘break down’. Also L370.
L290 – correct to ‘On an annual time scale’
L333 – correct to ‘…are not acting in isolation and other…’
L335 – correct to ‘…As soon as cracks exist, daily…’
L338 – correct to ‘…changes in snow duration…’
L375 – change to ‘…suggests that ice segregation caused slow fracture opening, which was reversed by ice relaxation.’
(note - there are more typos and minor grammatical errors than I've listed here, but I'll defer to the copy-editing team to pick these up and correct them in due course)