BackForward Variable: (13)CH4 delta

Definition
Full name (13)CH4 delta
Definition 3D field of Delta C-13 in CH4 (Methane) (isotopic signature). Isotopic ratio, expressed as deviations from an agreed-upon international reference measurement standard (which defines the corresponding isotope scales) using the delta notation: δ = (Rsample/Rreference – 1), with R = [rare isotope]/[abundant isotope].
Measuring Units ‰ Uncertainty Units ‰
Horizontal Res Units km Vertical Res Units km
Stability Units ‰ (Stability /decade)

 

Comment: See https://en.wikipedia.org/wiki/%CE%9413C
Last modified: 2022-02-21
Applied in OSCAR/Space Gap Analysis: No
Classification
  • Domain: Atmosphere
    • Sub-domain: Atmospheric chemistry
      • Variable: (13)CH4 delta
        • Measured in Layers:
          • MUS
          • UTLS
          • FT
          • PBL
          • Near Surface
          • M
  • Cross-cutting themes:

Requirements defined for (13)CH4 delta  (1)

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
943 (13)CH4 delta UTLS
FT
PBL
Near Surface 		2.6 Atmospheric Composition Forecasting and Monitoring 0.5 0.01 ‰
0.02 ‰
0.2 ‰
0.5 		0.01 ‰
0.02 ‰
0.2 ‰
0.5 		500 km
1000 km
2000 km
0.5 		0.5 km
1 km
3 km
0.5 		60 min
24 h
7 d
0.5 		24 h
28 d
168 d
0.5 		Global firm 2025-03-12 GAW Expert Team on Atmospheric Composition Network Design and Evolution GAW Rep. No. 242 Network Compatibility Goal Uncertainties are provided as 2 sigma. They represent the sum of random and systematic error. This is a test comment This is a test comment This is a test comment This is a test comment