Detecting long‐term changes in stomatal conductance: challenges and opportunities of tree‐ring δ18O proxy. Issue 3 (6th October 2022) - Guerrieri, Rossella; Belmecheri, Soumaya; Asbjornsen, Heidi; Xiao, Jingfeng; Hollinger, David Y.; Clark, Kenneth; Jennings, Katie; Kolb, Thomas E.; Munger, J. William; Richardson, Andrew D.; Ollinger, Scott V.