The authors present a valuable study on ozone deposition and stomatal uptake across the globe. The study is timely and can be a valuable contribution to BG. Three reviewer provided comments while two have made several suggestion to improve and revise the manuscript one reviewer believes this study is ready for publication as it is.
After having gone through the detailed comments from the more critical reviewers and the answer provided by Ducker et al. I still share the opinion that this is a valuable contribution to the existing knowledge on ozone fluxes. With that, I invite the authors to submit a revised version of the manuscript that addresses the individual suggestions made.

with kind regards and looking forward to the revised document

Lutz Merbold

Dear Authors,

you manuscript on 'synthetic ozone deposition and stomatal uptake at flux tower sites has undergone revision by two reviewers previously. In the revised version of the manuscript and your response, you successfully implemented suggested changes and further provided comprehensive arguments when suggested changes were not taken up.
The study is of great value - not only to the flux measurement community - but also to the much wider Biogeosciences community as it provides robust estimates for stomatal O3 uptake at many flux observation sites where these fluxes are not measured in situ. I can foresee many applications of SynFlux in explaining variations in GPP at the Fluxnet sites included in this study.
best regards

Lutz Merbold