Dear authors,

thank your for the revised version of your manuscript which I accept for publication in GMD. Please do the following corrections before submitting it to the Editorial office:

1) P. 3, l. 10 and P.4, l. 2: Make c in Kc and Pc a lower index.

2) P. 3, ll. 20 and 25: write "Px is a set of variables" because it is not "the set of variables" (there are more and it is not unique).

3) P. 7, l. 14: v(Kc) and v(Kcb) must be defined (I assume they are variances but it could be total variation as well). The phrase "very small" should be made more precise. Very small in comparison to what?

4) Page 10 and Caption of Figure 4: "Relative median" is sloppy language. What you have is the median of the relative quantities rRM(...), please say so!