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GCOS Upper-Atmosphere ECV - Earth Radiation Budget

The Earth Radiation Budget (at the top of the atmosphere) describes the overall balance between the incoming energy from the sun an the outgoing thermal (longwave) and reflected (shortwave) energy from the earth. It can only be measured from space. The radiation balance at the top of the atmosphere is the basic radiative forcing of the climate system. Measuring its variability in space and time over the globe provides insight into the overall response of the system to this forcing.

Products:

  • Top-of-atmosphere ERB longwave:
    • Frequency: Monthly (resolving diurnal cycle)
    • Resolution: 100 km/NA
    • Required Measurement uncertainty (Requirements on global mean): 1W/m2
    • Stability (per decade unless otherwise specified): 0.2 W/m2/decade
    • Standards/References: NOAA Tech Rep. NESDIS 134
    • Entity (Satellite): WGClimate
  • Top-of-atmosphere ERB shortwave (reflected):
    • Frequency: Monthly (resolving diurnal cycle)
    • Resolution: 100 km/NA
    • Required Measurement uncertainty (Requirements on global mean): 1.0W/m2
    • Stability (per decade unless otherwise specified): 0.3 W/m2/decade
    • Standards/References: NOAA Tech Rep. NESDIS 134
    • Entity (Satellite): WGClimate
  • Total solar irradiance:
    • Frequency: Daily
    • Resolution: NA/NA
    • Required Measurement uncertainty (Requirements on global mean): 0.04%
    • Stability (per decade unless otherwise specified): 0.01%/decade
    • Entity (Satellite): WGClimate
  • Solar spectral irradiance:
    • Frequency: Daily
    • Resolution: Spectral resolution: 1 nm < 290 nm; 2 nm 290-1000 nm; 5 nm 1000-1600 nm; 10 nm 1600-3200 nm; 20 nm 3200-6400 nm; 40 nm 6400-10,020  20,000 nm spacing up to 160,000 nm
    • Required Measurement uncertainty/Requirements on global mean: 0.3% (200-2400 nm)
    • Stability (per decade unless otherwise specified): 1% (200-2400 nm)/decade
    • Entity (Satellite): WGClimate
    • Entity (in situ): WIGOS

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