Data used to analyse glacier surface albedo change in the central Chilean Andes for the manuscript: Glacier albedo reduction and drought effects in the extratropical Andes, 1986-2020 Thomas E. Shaw1, Genesis Ulloa2, David Farías-Barahona3, Rodrigo Fernandez2, Jose Lattus2, James McPhee1,4 1 Advanced Mining Technology Center, Universidad de Chile, Santiago, Chile 2 Department of Geology, Universidad de Chile, Santiago, Chile 3 Institute für Geographie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany 4 Department of Civil Engineering, Universidad de Chile, Santiago, Chile Corresponding author: Thomas E. Shaw (thomas.shaw@amtc.uchile.cl) Keywords: Albedo, Andes, Glacier, Drought, Remote sensing, Climate %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Sub-folders: [Albedo]: 'Albedo_ChileanGlaciers_DATA.mat' = matlab file that contains a structure of all information for analyses. 'DATA' structure contains: NAME = Glacier name ALBEDO = 3D albedo matrices for each named glacier DEM = ASTER DEM of same resolution + size DEMtif = as above, but within a georeferenced GRIDobj frame read by TopoToolbox CLASS = classification as 0 (no data), 1 (ice) or 2 (snow) OTSUindex = The histogram separation value per year (per glacier) based upon Otsu inter-class variance SHADOW = Shadowed pixels based upon solar geometry SOLAR_AZI = Solar Azimuth per year taken from Landsat metadata SOLAR_ELE = Solar Elevation per year taken from Landsat metadata NIR = The Near-Infrared band of Landsat images for the Osu classification SLOPE = The calculated slope angle based upon the DEM (GRIDobj format) 'SHAPE' is an 18*1 structure of the imported shapefiles in matlab format. Can be plotted using 'mapshow' [Shapefiles]: 'CentralChileGlaciers.shp' = Shapefile of glacier boundaries delineated based upon April 2020 3 m PlanetScope imagery. [Climate]: 'Ta_Precip_HY.mat' = Mean Monthly Air temperature (°C) and monthly total precipitation (mm) at long term DGA weather stations for each Hydrological year (April-March) 'TAmonth_HY' = A matrix of 35 x 12 mean month air temperatures (°C) where rows (x35) = the hydrological year starting 1985-1986 and columns (x12) = the months of the hydrological year so that the first column is April and the final column is March of the following year 'PPmonth_HY' = As above but a 3D matrix of 35 x 12 x 3 for monthly sums of precipitation (mm). The rows and columns are defined above and the third dimension are the stations Riecillos (32.92°S, 70.35°W ,1290 m a.s.l.), Embalse Yeso (33.67°S, 70.08°W, 2475 m a.s.l.) and Rengo (34.19°S, 70.75°W, 515 m a.s.l.), respectively.