Dear Dr. Korth and co-authors,

I have been reading intensely through your answers to the reviewers and the revised manuscript and found that you did an excellent job.

I have just some very minor technical comments before your manuscript will be accepted for publication. These are:

- Consider a slightly different title, because I think at the moment (by syntax) your titel says that your model is in the Baltic Sea. How about for example: "Nitrate source identification in the Baltic Sea using isotopic nitrate ratios in combination with a Bayesian isotope mixing model"

- Please exchange "comparable" by "similar" where meant so, because everything is "comparable", see:
P5, L19 and 21
P12, L27
P12, L12


- In your discussion you somtimes use the term "significantly". If this statement is statistically significant, then OK. Otherwise please use a different word, because "significantly" together with data requests statistic proof. Here:
P11, L20
P12, L17

- P14, L32: Komma between "falsely" and "indicate"?

- Using the Suppl. Table 1 is OK. Please add to the Table caption: "Overview of the sampling stations (location and selected chemical parameters)."

- Please add at the end of the Fig. 1 caption: "For more data details see Suppl. Table 1".

Best wishes
Tina

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Tina Treude
BG Editor