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Peer review report 2 on “Intra-annual variability of wood formation and δ13C in tree-rings at Hyytiälä, Finland”
Agricultural and Forest Meteorology 217 (2016) 313
Contents lists available at ScienceDirect
Agricultural and Forest Meteorology journal homepage: www.elsevier.com/locate/agrformet
Peer Review Report
Peer review report 2 on “Intra-annual variability of wood formation and ␦13 C in tree-rings at Hyytiälä, Finland”
Original Submission Recommendation Accept Comments to Author This paper investigates the relationship between tree-ring stable carbon isotope ratios (␦13 C) of Pinus sylvestris and local weather variables at the intra-seasonal and inter-seasonal scales. The authors explored the possibility to build a standard methodology to analyze how local weather variables such as air temperature, photosynthetic active radiation (PAR) and precipitation can be used to predict wood radial growth (a Gompertz approach) and environmental controls on ␦13 C signals of the tree-rings. They found that wood radial growth (including determination of rates, onset and cessation of wood growth) was not well predicted by means
DOI of published article: http://dx.doi.org/10.1016/j.agrformet.2016.04.015. http://dx.doi.org/10.1016/j.agrformet.2016.11.126 0168-1923/
of ecosystem eddy fluxes. The Gompertz approach can successfully reproduce cell formation when microcores are used to fit the curve to dendrological measurements. Their results suggest that the addition of cell life time help improve to observe more completely the environmental effect on intra-annual tree-ring␦13C values. They also found that during the growing season, the treering ␦13C intra-annual pattern implied the shift of importance from air temperature during the early-wood to PAR during the middleand late-wood. These findings and the methods they used thereof are important to examine environmental controls on inter-annual and intra-annual wood growth. The paper is well organized and written. I suggest its acceptance of publication in Agricultural and Forest Meteorology. Anonymous Available online 2 December 2016
Contents lists available at ScienceDirect
Agricultural and Forest Meteorology journal homepage: www.elsevier.com/locate/agrformet
Peer Review Report
Peer review report 2 on “Intra-annual variability of wood formation and ␦13 C in tree-rings at Hyytiälä, Finland”
Original Submission Recommendation Accept Comments to Author This paper investigates the relationship between tree-ring stable carbon isotope ratios (␦13 C) of Pinus sylvestris and local weather variables at the intra-seasonal and inter-seasonal scales. The authors explored the possibility to build a standard methodology to analyze how local weather variables such as air temperature, photosynthetic active radiation (PAR) and precipitation can be used to predict wood radial growth (a Gompertz approach) and environmental controls on ␦13 C signals of the tree-rings. They found that wood radial growth (including determination of rates, onset and cessation of wood growth) was not well predicted by means
DOI of published article: http://dx.doi.org/10.1016/j.agrformet.2016.04.015. http://dx.doi.org/10.1016/j.agrformet.2016.11.126 0168-1923/
of ecosystem eddy fluxes. The Gompertz approach can successfully reproduce cell formation when microcores are used to fit the curve to dendrological measurements. Their results suggest that the addition of cell life time help improve to observe more completely the environmental effect on intra-annual tree-ring␦13C values. They also found that during the growing season, the treering ␦13C intra-annual pattern implied the shift of importance from air temperature during the early-wood to PAR during the middleand late-wood. These findings and the methods they used thereof are important to examine environmental controls on inter-annual and intra-annual wood growth. The paper is well organized and written. I suggest its acceptance of publication in Agricultural and Forest Meteorology. Anonymous Available online 2 December 2016