Fig. 4: “Little Ice Age” (LIA) reconstruction of Juneau Icefield.

A Reconstruction of Juneau Icefield during the Little Ice Age. Geomorphic data from ref. 21. Legend shows number of features in brackets. B ice surface lowering (m), LIA (1770) to present (year 2013; comparison with Copernicus DEM). More information on the LIA reconstruction is available in Supplementary Information with glacier equilibrium line altitudes (ELAs) from the LIA shown in Supplementary Figs. 9–11. Feature counts are shown in brackets in the legend. ASTER GDEM is the Global Digital Elevation Model produced by ASTER, courtesy of NASA/JPL-Caltech.