Requirement #879 


For variable: CH4

In application: Providing Atmospheric Composition information to support services in urban and populated areas

Goal Breakthrough Threshold
Uncertainty 8 ppb 18 ppb 36 ppb
Stability/decade (if applicable) 1 ppb 2 ppb 5 ppb
Horizontal Resolution 0.5 km 2 km 4 km
Vertical Resolution 20 m 100 m 500 m
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. 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: CH4
        • Applicable (vertical) layers:
          • PBL
        • Horizontal Coverage: Local