Dear authors,
many thanks for your responses, which address the reviewer concerns sufficiently. I'm still worried that the evidence base for your proposed scheme is extremely thin. I would recommend to be more explicit about this in your conclusion section by revising the sentence "Targeted measurement campaigns may provide more detailed information on the appropriateness of our τO3 formulation." to acknowledge that the application in an ESM context requires more data for parameterisation.
With kind regards,
Sönke Zaehle

Dear authors,

many thanks for your revised manuscript, and apologies for the delay in treating your manuscript because of a prolonged leave period. I remain sceptical about the utility of your approach, but the paper is clear and interesting enough to merit publication, so as to stir further discussion.

Best wishes,
Sönke

PS: For future reference, it would be preferrable to stick to the journal's request to submit a track-changed version with the revisions to aid the editor's work.