Dear Dr. Krall and co-authors,

Your manuscript is now accepted for publication in Ocean Science. Please take a look at the final comments by the referee and my own comments, the latter of which appear below for preparing the final version of the manuscript.

Please change all units into the format with negative exponent, for example m s-1

Dates should have a format like 24 July 2015

P1, L5 … are much lower than those based on the empirical wind speed …
P1, L18 dimethylsulfide (lower case)

P1, L18 … state of the art methods of measuring …
P1, L20 k was explained earlier in the paragraph, but it is not clear what k600 denotes

P2, L17-18 “A wealth of studies have shown, that, despite the common approach parameterizing the gas transfer velocity to wind speed alone, a multitude of other factors influence gas transfer …” This is a strange construction. Please modify the sentence for better readability.

P2, L26 One factor contributing to the disagreement between gas transfer velocities measured at the same wind speed by different methods are surface …

P3, L5 with a seasonal dependency at a near-shore location (Schmidt and Schneider, 2011).

P5, L4 The references appear better at the end of the sentence.
P5, L7 insert comma after exponent (for more clarity of the sentence)

P5, L12 What does “see 1” mean here? I think it can be deleted.
P6, L17 Schmidt (2) is obviously incorrect, also in the Reference list. Please correct.

P7, L1 … at stations where the vessel …
P8, L1 … by the weather station of each vessel.

P9, L4 … transfer velocities against the wind speed …
P12, L8-10 Because of the high solubility of dimethylsulfide (DMS), this tracer’s gas transfer has almost no bubble-induced component; transfer velocities of DMS measured by Bell et al. (2013, 2015) have values very similar to ours, indeed (Fig. 6).

P12, L14 parameterization
P12, L17, 20 m s-1 (format)

P12, L23 “young seas” Is this term common?
P13, L2 probably (not possibly)?

P13, L6 delete Therefore
P13, L9 delete comma after helpful
P13, L31 … these data, some individual measurements …

Thanks and best wishes
Mario Hoppema