The δ13C series of different components from Masson pine

The idea of this study is to analyze the effects of climatic drivers on
the radial growth (total ring width, earlywood width, and latewood width)
and the δ13C series of different wood components (whole wood, α-cellulose,
and holocelluose) from Masson pine in subtropical China. Pairwise
correlation is significant between three ring width parameters. Earlywood
and latewood width did not reveal much stronger climatic sensitivity
rather than total ring width. This indicates that the use of intra-annual
ring width maybe have little benefit in extracting more climate
information. The mean δ13C series of the three components of the total
ring had the strongest climatic response to the July–September relative
humidity (r= -0.792 (whole wood, WW), -0.758 (holocellulose, HC) and
-0.769 (α-cellulose, AC)). These results suggest that whole wood from
Masson pine is sufficient to enhance the climate signal without cellulose
isolation. Through both stationary temporal and spatial-statistical
perspectives, the moisture drivers (summer/autumn) had a significant
impact on three ring width parameters and three components of Masson pine.
Overall, the tree ring width parameters and the δ13C series from the total
ring showed a different response to the same climate drivers during the
same period. The δ13C series may be a more representative climate proxy
than tree-ring width parameters for the dendroclimatology in subtropical
China.