Monthly Precipitation Reconstruction in Subtropical South America Using Seasonal Tree‐Ring Oxygen Isotopes - Liu, Sainan; Xu, Chenxi; Fontana, Cláudia; An, Wenling; Tomazello Filho, Mario; Zhao, Qingyu; Zhao, Yaru; Liu, Yucheng; Guo, Zhengtang (Journal of Geophysical Research: Biogeosciences, 2023)