Requirement #882 

Values

For variable: CH4 Mole fraction (SR)

In application: Forecasting Atmospheric Composition

Application-dependent Technical Priority:

Goal Breakthrough Threshold Priority
Uncertainty 2 ppb 4 ppb 8 ppb
Layer/s Quality
Coverage Quality
Stability/decade (if applicable) 1 ppb 2 ppb 5 ppb
Horizontal Resolution 1 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
General Comment: Uncertainties are provided as 2 sigma. They represent the sum of random and systematic error. Requirements are for profile measurements. ICOS Atmos. Stations Specifications. Currently ICOS simply adopts the GAW recommendations. SR (source region) refers to measurements made within or close to source of pollution. Confidence: firm
Def: :Result of impact studies of actual data used in actual applications of numerical or conceptual models
Application Area Comment: Horizontal Coverage Comment:
Observation Comment: Performance Comment:
Specifications
  • Domain: Atmosphere
    • Subdomain: Atmospheric chemistry
      • Variable: CH4 Mole fraction (SR)
        • Applicable (vertical) layers:
          • UTLS
          • FT
          • PBL
          • Near Surface
        • Horizontal Coverage: Regional