Dear Authors:

Thank you for contribution to Biogeosciences and for sending a revised manuscript and responses. I studied your responses to referee’s comments and revisions. Both referees are positive to accept this manuscript for publication, and I confirmed you replied properly to them. Therefore, I conclude that this manuscript is acceptable for publication, after a very minor technical correction and addition of an optional discussion.

Technical correction:
Please apply same capitalization rule to axis names in each figure: e.g. “Solar Zenith Angle” in Figure 2, “measured diffuse radiation” in Figure 4c, and “Residuals form regressing Ca” in Figure 13a.

Optional addition of discussion
This is an optional (not mandatory) recommendation. In most forest ecosystems, vegetation canopy is composed of multiple layers such as overstory and understory, and you may discuss a potential error and feasible improvement for this matter.

Best regards,
Akihiko Ito