Aspen (Populus tremuloides) tree cores to determine stem radial growth

We (Justine Karst and Nadir Erbilgin) cored three to four aspen trees per plot on September 12, 2020, to capture stem radial growth across the duration of the experiment, including ring growth in 2019, the year aspen roots were collected. From each tree, we collected two increment cores with a 4.3 mm increment borer at a height of 1.3 m. We sanded mounted increment cores with progressively finer sandpaper up to 1200 grit and scanned them at 2400 DPI. Joseph Birch measured the width of annual growth rings of cored trees and cross-dated the measurements. These data are also posted with the International Tree Ring Database.