Figure 1. Stand regions and moisture conditions across eastern United States deciduous forests. Aridity index values are mean Aridity-Witness Index (calculated as the fraction of mean annual precipitation to mean annual evapotranspiration) at 9 m spatial resolution from 1970–2000. Aridity index data were accessed from the CGIAR-CSI GeoPortal at https://cgiarcsi.community (Trabucco & Zomer, 2009).