Requirement #874 


For variable: CO2 Mole fraction (BG)

In application: Monitoring Atmospheric Composition

Goal Breakthrough Threshold
Uncertainty 0.1 ppm 0.2 ppm 0.5 ppm
Stability/decade (if applicable) 0.1 ppm 0.15 ppm 0.2 ppm
Horizontal Resolution 500 km 1000 km 2000 km
Vertical Resolution 0.5 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. Requirements are for profile measurements. Ref: GAW Rep. No. 242. Network compatibility goal 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: CO2 Mole fraction (BG)
        • Applicable (vertical) layers:
          • UTLS
          • FT
          • PBL
          • Near Surface
        • Horizontal Coverage: Global