Fig. 6
From: A unified ensemble soil moisture dataset across the continental United States

Same as Fig. 5 but for the standard deviation (SD) of soil moisture among data products of the same types. Dist is the distance to the nearest coast. PCT_sand denotes the percentage of sand in the soil. Slope refers to the topographic gradient, derived from elevation data. SD_elv is the standard deviation of elevation. Details of the data sources are provided in the Methods section.