Below concerns need to be re-visited in the manuscript.
1. Although, the abstract and introduction looked very interesting and fits on ACP in terms of chemistry since the text brought up some link between polluted air with forest setting. However, the main context does not containing any discussion about it; rather it only describes the measurement results and confirms previous findings. Provide more through discussion about chemistry and flux.
2. The flux measurements are done within the roughness sublayer. State the limitation of the measurement with possible errors in the analysis due to the low flux measurement height.
3. The Reynold’s number in PTR-QMS seems very low for the eddy-covariance flux measurements. Provide proper analysis for possible missing fluxes of the species due to the laminar flow in the inlet.
In general, reviewer 2’s comments should be address more thoroughly than the current version does.