Dear authors,
both reviewers agreed that the manuscript presents an interesting and large data set on the phenology of trees in response to natural droughts. While this is a timely topic, both reviewers also indicated that the manuscripts requires various clarifications, which you addressed in your responses. The reviewers also indicated that the discussion was not clearly structured. You have largely rewritten the discussion, and thus, the reviewers should again evaluate the manuscript.

In addition, I want to ask the authors to clarify how NIRS which has been used to determine N contents has been calibrated against measured N concentration (e.g. using a C/N analyzer).

Please increase the font size in the captions and legends of the Figures.

Best regards
Frank Hagedorn

Dear authors,

thanks a lot for revising the manuscript. Both reviewers agreed that the manuscript has improved considerably and that it contributes to our mechanistic understanding of drought effects on tree growth.
Best regards
Frank