Dear Dr. Lavergne,

Thank you for submitting your manuscript “Modelling tree-ring cellulose d18O variations of two temperature-sensitive tree species from North and South America” to Climate of the Past. Based on the reviewers’ assessments and your replies to the reviewers’ comments, I invite you to submit a revised version of the manuscript.

Best regards,
Laurie Menviel

Dear Dr. Lavergne,

Thank you for submitting a revised version of your manuscript "Modelling tree-ring cellulose d18O variations of two temperature-sensitive tree species from North and South America".
Please find a few additional minor suggestions and typos to correct. I also invite you to have another careful read of your manuscript, including figure legends and references.

Best regards,
Laurie Menviel

L. 44: “is more likely linked to the” do you want to say “is primarily linked to”?

Move L. 133-134 (location of the model) to a new section “Code and data availability” to be added at the end of manuscript (right before the acknowledgment section.
Move L. 165-166 (IAEA web address) to the new section “Code and data availability”
Move L. 181-182: “extracted at http://paos.colorado.edu/~dcn/SWING/database.php” to the new section “Code and data availability”
Move L. 209: “provided by the NOAA/OAR/ESRL (https://www.esrl.noaa.gov/psd/data/gridded/data.20thC_ReanV2c.html),” to the new section “Code and data availability”
Move L. 220: “ http://cfs.nrcan.gc.ca/projects/3/4” to the new section “Code and data availability”

Please modify as follow:
L. 180: “1) The Melbourne University model (MUGCM)”
L. 183: “the Laboratoire de Météorologie Dynamique Zoom model (LMDZ5A)”
Please rephrase: L. 227 “as displayed in the observations” or “as shown”
L. 324: Please rephrase “are more highly correlated” as I don’t think it is grammatically correct. Some suggestions: “are highly correlated” or “have a higher correlation coefficient”

Reviewer 1 suggested to use “tree rings” please use this spelling throughout the manuscript (i.e. change all the “tree-rings”, e.g. title, section 2.1, legend of figure 1, keywords…).

L. 476: “we have provided”
L. 733: please add a space between “ones” and “with” or rephrase: “The tests sites from Quebec are in black and the Argentinean ones are in red.”
Legend of figure 3: Please spell out “DOY”
Legend of figure 4: “densities of probability of the coefficient of correlation” should it be instead “probability density functions”?
Figure 4 and 5: As already noted by Reviewer 1 the y axis should be “Kernel” and not “Kernal”, please correct. Also in figure 5 the y axis should read “Kernel density estimate”