Variable: Cloud cover

Definition
Full name Cloud cover
Definition 3D field of fraction of sky filled by clouds.
Measuring Units % Uncertainty Units %
Horizontal Res Units km Vertical Res Units
Stability Units % (Stability /decade)

 

Comment: The total cloud cover cannot be simply derived from the 3D cloud cover because of unknown overlapping of cloud layers over any given area.
Last modified: 2012-04-27
Classification
  • Domain: Atmosphere
    • Sub-domain: Clouds and precipitations
      • Variable: Cloud cover
        • Measured in Layers:
          • TrC
          • UTLS
          • FT
          • PBL
  • Cross-cutting themes:

Requirements defined for Cloud cover  (9)

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 and threshold orange

Id Variable Layer App Area Uncertainty Stability / decade Hor Res Ver Res Obs Cyc Timeliness Coverage Conf Level Val Date Source
81 Cloud cover TC Climate-AOPC (deprecated) 10 %
15 %
20 %
99 km
100 km
500 km
3 h
4 h
6 h
3 h
6 h
12 h
Global firm 2007-07-19 AOPC
430 Cloud cover PBL Nowcasting / VSRF 5 %
10 %
20 %
1 km
5 km
20 km
30 sec
3 min
60 min
60 sec
3 min
30 min
Global firm 2003-10-20 ET ODRRGOS
493 Cloud cover PBL Ocean Applications 0.5 km
1 km
5 km
3 min
7 min
30 min
15 min
24 min
60 min
Global firm 2011-03-07 JCOMM (Ali Mafimbo)
727 Cloud cover PBL Aeronautical Meteorology Point firm 2013-12-05 J van der Meulen
206 Cloud cover TC GEWEX (deprecated) 5 %
10 %
20 %
50 km
100 km
250 km
3 h
6 h
12 h
30 d
45 d
60 d
Global reasonable 1998-10-29 WCRP
259 Cloud cover TC Global NWP 5 %
10 %
20 %
5 km
15 km
50 km
60 min
3 h
12 h
6 min
30 min
6 h
Global reasonable 2009-02-10 John Eyre
703 Cloud cover TrC Nowcasting / VSRF 5 %
10 %
20 %
1 km
5 km
20 km
5 min
15 min
60 min
5 min
15 min
60 min
Global reasonable 2013-04-15 P. Ambrosetti
791 Cloud cover UTLS Climate Monitoring (GCOS) 50 km 3 h Global reasonable 2019-09-25 GCOS-200: The Global Observing System for Climate: Implementation Needs (Published 2016)
343 Cloud cover TrC High Res NWP 5 %
8 %
20 %
0.5 km
2 km
10 km
15 min
30 min
3 h
15 min
30 min
2 h
Global tentative 2010-02-01 T Montmerle