The long way down—are carbon and oxygen isotope signals in the tree ring uncoupled from canopy physiological processes?

Christine Offermann, Juan Pedro Ferrio, Jutta Holst,Rüdiger Grote, Rolf Siegwolf, Zachary Kayler,Arthur Gessler

Tree Physiology, Volume 31, Issue 10, October 2011, Pages 1088–1102,

https://doi.org/10.1093/treephys/tpr093