Dear Anna and Hanna

I greatly appreciate your clear point-to-point replies and the improvement of the manuscript.

A few issues should be solved, before I can accept the manuscript of publication in GMD.

Main concern:

The section title "validation" is way too strong for what has been done in section 4.
I would call it something like "Comparison (with ..)"
Also change "validate" in the summary.

typos and language issues:

p.2,l.8: it's = its

p.4,l.1: I think the word multiplicity does not really fit in this sentence although I understand that you want to introduce this technical term. Better: "representing a specified number (called multiplicity) of real particles ..."

It happens several times that you leave out the article in front of a noun, e.g. p.4,l.19: "using A Monte-Carlo .."

In the literature, one can much too often read "cold/warm temperature" which is nonsense. The temperature is high/low telling you the air or whatsoever is warm/cold. The same things applies to "acidic pH", doesn't it? Please check, there are several occurrences.

p.9,l.6 NH+ = NH4+?

Figure 3: please remove the short curve segments outside of the plot area.

Regards,
Simon

Dear Anna, dear Hanna

congratulations to the paper!

Best wishes,
Simon