WMO OSCAR | Details for Variable: CH4 Mole fraction (SR)

Variable: CH4 Mole fraction (SR)

Definition

Full name	CH4 Mole fraction (SR)
Definition	3D field of amount of source region (SR) CH4 (Methane, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles)
Measuring Units	ppb	Uncertainty Units	ppb
Horizontal Res Units	km	Vertical Res Units	km
Stability Units	ppb (Stability /decade)

Comment:	SR (source region) refers to measurements made within or close to polluted areas
Last modified:	2022-12-05
Applied in OSCAR/Space Gap Analysis:	No

Classification

Domain: Atmosphere
- Sub-domain: Atmospheric chemistry
  - Variable: CH4 Mole fraction (SR)
    - Measured in Layers:
      - TC
      - TrC
      - MUS
      - UTLS
      - FT
      - PBL
      - Near Surface
      - M

Cross-cutting themes:

Earth System Application Categories and its related Application Areas:
- 2. Atmospheric Applications
Unknown:
- Forecasting Atmospheric Composition

Requirements defined for CH4 Mole fraction (SR) (2)

This tables shows all related requirements. For more operations/filtering, please consult the full list of Requirements
Note: In reading the values, goal is marked blue, breakthrough green, threshold orange
Application-dependent Technical Priority (ATP) Magenta and Relative priority of the attributes Red

Id	Variable	Layer	App Area	ATP	Uncertainty	Layer/s Quality	Coverage Quality	Stability / decade	Hor Res	Ver Res	Obs Cyc	Timeliness	Coverage	Conf Level	Val Date	Source	General Comment	Application Area Comment	Horizontal Coverage Comment	Observation Comment	Performance Comment
882	CH4 Mole fraction (SR)	UTLS FT PBL Near Surface	Forecasting Atmospheric Composition		2 ppb 4 ppb 8 ppb			1 ppb 2 ppb 5 ppb	1 km 250 km 500 km	0.1 km 1 km 3 km	60 min 24 h 7 d	24 h 30 d 182 d	Regional	firm	2022-01-05	GAW Expert Team on Atmospheric Composition Network Design and Evolution	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.
883	CH4 Mole fraction (SR)	UTLS FT PBL Near Surface	2.6 Atmospheric Composition Forecasting and Monitoring		2 ppb 4 ppb 8 ppb			1 ppb 2 ppb 5 ppb	1 km 250 km 500 km	0.1 km 1 km 3 km	60 min 24 h 7 d	24 h 30 d 182 d	Regional	firm	2022-01-06	GAW Expert Team on Atmospheric Composition Network Design and Evolution	Uncertainties are provided as 2 sigma. They represent the sum of random and systematic error. Requirements are for profile measurements. ICOS Atmos. Stations Specifications. Extended network compatibility goal. Currently ICOS simply adopts the GAW recommendations. SR (source region) refers to measurements made within or close to pollution source.