ECV Products and Requirements for Soil Moisture
These products and requirements reflect the Implementation Plan 2016 (GCOS-200). GCOS is reviewing and will update the requirements until 2022. More information on: gcos.wmo.int.
| PRODUCT | DEFINITION | FREQUENCY | RESOLUTION | REQUIRED MEASUREMENT UNCERTAINTY | STABILITY | STANDARDS/ REFERENCES |
| Surface soil moisture | Average water content in topmost soil layer (0-5 cm) | Daily | 1-25 km | 0.04 m3/m3 | 0.01m3/ m3/year | WMO (2008b) |
| Freeze/thaw | Flag indicating whether the land surface is frozen or not | Daily | 1-25 km | 90% | tbd | |
| Surface inundation | Flag indicating whether the land surface is inundated or not | Daily | 1-25 km | 90% | tbd | |
| Root-zone soil moisture | Average soil moisture content in root-zone layer | Daily | 1-25 km | 0.04 m3/m3 | 0.01 m3/m3/year |
