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GCOS Land ECV - Soil Moisture

Soil moisture is an important variable in land–atmosphere feedbacks at both weather and climate timescales. It plays a major role in determining how the energy flux into the land from incoming radiation is partitioned into fluxes of latent and sensible heat from the land to the atmosphere, and in the allocation of precipitation into runoff, subsurface flow and infiltration. Soil moisture is intimately involved in the feedback between climate and vegetation, as both local climate and vegetation influence soil moisture through evapotranspiration, while soil moisture is a determinant of the type and condition of vegetation in a region. Changes in soil moisture can accordingly have substantial impacts on agricultural productivity, forestry and ecosystem health.

Product Requirements:

  • Surface soil moisture:
    • Frequency:  Daily
    • Resolution:  1-25 km
    • Required Measurement uncertainty:  0.04 m3/m3
    • Stability (per decade unless otherwise specified):  0.01 m3/m3/year
    • Standards/References:  WMO (2008b)
    • Entity (Satellite):  WGClimate
    • Entity (in situ):  ISMN
  • Freeze/thaw:
    • Frequency:  Daily
    • Resolution:  1-25 km
    • Required Measurement uncertainty:  90 %
    • Stability (per decade unless otherwise specified):  TBD
    • Entity (Satellite):  WGClimate
    • Entity (in situ):  ISMN
  • Surface inundation:
    • Frequency:  Daily
    • Resolution:  1-25 km
    • Required Measurement uncertainty:  90 %
    • Stability (per decade unless otherwise specified):  TBD
    • Entity (in situ):  ISMN
  • Root-zone soil moisture:
    • Frequency:  Daily
    • Resolution:  1-25 km
    • Required Measurement uncertainty:  0.04 m3/m3
    • Stability (per decade unless otherwise specified):  0.01 m3/m3/year
    • Entity (in situ):  ISMN

Networks:

Data Sources: