Dear Prof. Kim,

Thank you very much for point-by-point responses to the reviewers’ comments. We would appreciate it very much if you could upload the latest version of your manuscript to the website of Biogeosciences. Once we get your paper, we will send it to a reviewer for further review.

Thank you again for your wonderful effort to improve the manuscript.

Kind regards,

Koji Suzuki
Editor

Dear Prof. Kim,

We have just received some minor comments (see below) on your revised manuscript from the referee who examined the first version of your paper. So we would be very grateful if you could consider these issues and make a further revised manuscript with point-by-point responses to the reviewer's comments.

Thank you again for your nice effort to improve the manuscript.

Kind regards,

Koji Suzuki
Editor

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The authors basically addressed my comments well and revised manuscript according to comments. I only have some minor comments.

Lines 142-145: I could not understand this description. What was compared between uncorrected and corrected values for the inner filter effect? Did the authors compare fluorescence intensity at a specific pair of Ex/Em wavelengths (e.g., Ex/Em=350/450)? Please clarify it in the revised manuscript.

Lines 165 and 181: I think “Fig. 1” should be “Fig. 2”. Please check these.

Lines 197-204: A description regarding with C4 is missing, even though the authors described that “Four components were identified in the water samples from the EEMs dataset”. The description should be added.

Line 242: I think “leached” is better than “extracted” here. Please consider it.

Dear Prof. Kim,

Thank you very much for taking into consideration the reviewer's comments. I consider that the revised manuscript has been improved sufficiently. It is a great pleasure now to accept your manuscript for publication in Biogeosciences. Below are several technical corrections I suggest to you.

26: were the major source and behaved conservtively ...
L120: were purged ...
L123: by a NDIR
L172-173: from -28.2‰ to -17.6‰
L183: S=0. The unit of ‰ should be omitted.
L184: S=29. This is the same as L183.
L189-190: In these sentences, you used en dash (–) for minus (-). Please unifty the style throughout the manuscript.

Thank you again for choosing the journal Biogeosciences as an outlet of your excellent work.

Kind regards,

Koji Suzuki
Editor