Dataset Title: Global map of soil sand, silt, and clay fractions, and calculated time for the top 2 mm to dry (in min) ----- A global map of sand, silt, and clay fractions, derived from the global WISE v. 3.1 30 x 30 arcsec database resampled to 0.25° x 0.25°, plus estimated drying time (of the top 2 mm) calculated from these data using DT (minutes) = 15.95 % Sand + 28.05 % Silt + 20.28 % Clay – 1494. This relationship fits the published values from Ravi et al. [2006] with R2 = 0.99. Ravi, S., Zobeck, T. M., Over, T. M., Okin, G. S., & D'Odorico, P. (2006). On the effect of wet bonding forces in air-dry soils on threshold friction velocity of wind erosion. Sedimentology, 10.1111/j.1365-3091.2006.00775.x ## Description of the Data and file structure Data are in TIFF/GeoTIFF Format and can be opened in standard image processing (for remote sensing data) or GIS (e.g., ArcGIS, QGIS) software. Because the images are raw floating point data and not image data, an image viewer (suitable for photos, for example) will not display the data correctly and may fail to open the image altogether. The .tfw file is the "world" file that must accompany the .tif image (in the same directory) when opening in order for the image to be properly geographically registered. Band 1: SNUM Index code (floating point, not needed to use) Band 2: Sand fraction (unitless, 0-1, floating point) Band 3: Silt fraction (unitless, 0-1, floating point) Band 4: Clay fraction (unitless, 0-1, floating point) Band 5: Drying time (minutes, floating point) Cell size: 0.25° x 0.25° Geographic extent: [-180E,180E], [60N,60S] Projection: Geographic, WGS-84 Was data derived from another source? Soil texture data from Batjes, N. H. (2016). Harmonized soil property values for broad-scale modelling (WISE30sec) with estimates of global soil carbon stocks. Geoderma, 269, 61-68. 10.1016/j.geoderma.2016.01.034