Fig. 3

PDSI and four measures of wood density at breast height, averaged over the six GSLs, vs. year (1940–2016). The wood density measures are ring density (RD; kg m⁻³), EW density (EWD; kg m⁻³), LW proportion (LWP), and LW density (LWD, kg m⁻³). Red solid lines indicate years of thinning (1962, 1972, 1982, 1992, 2003), and gray dashed lines indicate drought years commonly used as marker years in the Southwest (1951, 1956, 1963, 1977, 1989, 1996, 2002). Figure produced in R with some limited post-processing in Inkscape