Soil texture exerts a lesser, but still substantial, influence. Organic content, except where concentrations are very high, has relatively little effect. The file is available in an ascii array format. No data are given for land ice grid cells, most of which occur in Antarctica and Greenland, or for other unvegetated areas. A value of -99.0 indicates either a water grid cell or a land ice grid cell.
Units are cm.
Dunne, K.A. and Cort J. Willmott. Dunne, K.A. and Cort J. Willmott. Global distribution of plant-extractable water capacity of soil. International Journal of Climatology.