Current Bioclimatic envelope for Aspen. Data from Rehfeldt, G.E., Crookston, H.L., SaenzRomero, C, and Campbell, E.M., 2012, North 1 American vegetation model for land use planning in a changing climate. A solution to large 2 classification problems: Ecological Applications, v. 22, no. 1, p. 119 to 141.