Soil Water Index 2007-present (raster 12.5 km), global, daily - version 4

The Soil Water index (SWI) product provides global daily information about moisture conditions in different soil layers. SWI daily images are produced from EUMETSAT ASCAT-25km SSM product in orbit format and include a quality flag indicating the availability of SSM measurements for SWI calculations. Soil moisture is a key parameter in numerous environmental studies including hydrology, meteorology and agriculture. In addition to Surface Soil Moisture (SSM), information on the moisture condition within the underlying soil profile is of interest for different applications.

Soil moisture in plant root zone can be estimated by an infiltration model using information on surface soil moisture and soil characteristics.
The data are available over the globe at the spatial resolution of 0.1° and with the temporal extent from January 2007 to present.