Requirement #868 


For variable: N2O mole fraction (SR)

In application: Forecasting Atmospheric Composition

Goal Breakthrough Threshold
Uncertainty 0.1 ppb 0.3 ppb 0.6 ppb
Stability/decade (if applicable) 0.05 ppb 0.1 ppb 0.3 ppb
Horizontal Resolution 100 km 250 km 500 km
Vertical Resolution 0.1 km 1 km 3 km
Observing Cycle 60 min 24 h 7 d
Timeliness 24 h 30 d 182 d


Validated: 1/5/22 Source: GAW Expert Team on Atmospheric Composition Network Design and Evolution
Comment: Uncertainties are provided as 2 sigma. They represent the sum of random and systematic error. ICOS Atmos. Stations Specifications. Currently ICOS simply adopts the GAW recommendations. Requirements are for Profile measurements. Confidence: firm
Def: :Result of impact studies of actual data used in actual applications of numerical or conceptual models
  • Domain: Atmosphere
    • Subdomain: Atmospheric chemistry
      • Variable: N2O mole fraction (SR)
        • Applicable (vertical) layers:
          • UTLS
          • FT
          • PBL
          • Near Surface
        • Horizontal Coverage: Regional