Dear Prof. Dr. Rothfuss,

Thank you for submitting your manuscript "Reviews and syntheses: Gaining insights into evapotranspiration partitioning with novel isotopic monitoring methods" to Biogeosciences. After reviewing the comments made by the referees and your response letters, I find that your manuscript requires major revisions to address the main concerns of the referees. Your responses to the referee comments and suggested changes to the paper are very detailed and complete. Please incorporate these into the revised version of the manuscript.

Personally, I do not agree on the exclusion of interception evaporation, even though there are methodological constraints as you indicated in your response letters. I would appreciate if this topic will be discussed at least shortly in the paper. As the paper addresses a broader readership it should be clearly stated that the main equations and methods are only valid for soil evaporation/transpiration partitioning.

Best regards,

Ivonne Trebs

Dear Prof. Dr. Rothfuss,

Thank you for the detailed revision of your manuscript. Please find attached some minor comments to be addressed before final publication.

Best regards,

Ivonne Trebs