BackForward Variable: Number of Cloud Condensation Nuclei

Definition
Full name Number of Cloud Condensation Nuclei
Definition Number of aerosol particles which can activate to a cloud droplet at a given supersaturations of water. CCN is often indicated as a percent of the total CN for specific supersaturation typical of atmospheric cloud formation
Measuring Units dimensionless Uncertainty Units %
Horizontal Res Units km Vertical Res Units km
Stability Units % (Stability /decade)

 

Comment:
Last modified: 2025-04-15
Applied in OSCAR/Space Gap Analysis: Yes
Classification
  • Domain: Atmosphere
    • Sub-domain: Clouds and precipitations
      • Variable: Number of Cloud Condensation Nuclei
        • Measured in Layers:
  • Cross-cutting themes:

Requirements defined for Number of Cloud Condensation Nuclei  (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
1142 Number of Cloud Condensation Nuclei 2.5 Atmospheric Climate Monitoring 0.5 20 %
40 %
60 %
0.5 		50 km
100 km
500 km
0.5 		1 km
5 km 		12 h
24 h
30 d
0.5 		58 min
24 h
1 y
0.5 		Global firm 2025-04-15 GCOS-245: The 2022 ECVs Requirements (GCOS-245) uncertainty at 2-sigma stability: difficult to evaluate as no trend in CNN are currently available