Thank you for your detailed response to the comments of the reviewers. As you will have seen both of them believe that your ppaer should eventually reach a level where it can be published. However they both believe that this requires major revisions, and this seems to be what you envisage in your response also. I think, as you realise, that the most crucial general issues to be dealt with are:
1. Simplify and shorten the text to make sure the main messages, as well as your methodology, come through clearly
2. Be sure to give a realistic but not over-pessimistic interpretation, clarifying that your results apply to low accumulation sites, and to certain amplitudes and timescales of change, but not necessarily to longer trends and larger amplitudes
3. I agree with the reviewers that it is not wise to recommend a single injection in the CRDS, as this could not reasonably correct for the memory effects. I do not think this recommendation is sutainable unless you show the results of single injections and demonstrate that their error compared to the average of 3 or 6 injections is much smaller than the other trems you discuss. Perhaps you should instead recommend that analysts test the number of injections, or the rest time between injections, that is necessary to lower the "memory noise" to an acceptable level.

The paper certainly has merit however, and I would welcome a new version that implements the major revisions discussed in your reply. I would most likley send the paper back to both reviewers on receipt.

I agree with the reviewers that you have done a good job of simplifying the paper and that this seems like a very useful contribution. Referee 1 has some rather significant issues about the role of diffusion which you need to address. Both reviewers have some minor issues that should be looked at. Please prepare a new version taking these into account. Provided I am confident you have dealt with rev 1's diffusion issue i will then be able to consider the paper without further review.

Thanks for these latest revisions. I am happy now to accept the paper.