Variable:
Cloud cover
Requirements defined for Cloud cover (8)
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | Accuracies should apply to low and high clouds separately. See Hansen et L. (1995) in T.R. Karl (Ed.) 1995 Long term climate monitoring by the Global Climate Observing System. Kluwer. Also, Climatic Change 31, Nos. 2-4. | |||||||||
| 430 | Cloud cover | PBL | 2.3 Nowcasting / Very Short-Range Forecasting | 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 | ||||||||||
| 727 | Cloud cover | PBL | 2.8 Aeronautical Meteorology | 5 % 7 % 25 % |
10 min 30 min 60 min |
5 min 10 min 30 min |
Point | firm | 2014-03-31 | J van der Meulen | At the aerodrome Source: ICAO Annex 3, Att A: "Cloud amount" ± 1 okta | ||||||||||
| 791 | Cloud cover | 2.5 Atmospheric Climate Monitoring | 0.5 | 3 % 6 % 12 % 0.5 |
0.3 % 0.6 % 1.2 % 0.5 |
25 km 100 km 500 km 0.5 |
60 min 24 h 30 d 0.5 |
60 min 3 h 12 h 0.5 |
Global | firm | 2023-04-28 | GCOS-245: The 2022 ECVs Requirements (GCOS-245) | Requirements for uncertainty are specified at 2-sigma. | ||||||||
| 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 | 2.1 Global Numerical Weather Prediction and Real-time Monitoring | 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 | 2.3 Nowcasting / Very Short-Range Forecasting | 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 | ||||||||||
| 343 | Cloud cover | TrC | 2.2 High-Resolution Numerical Weather Prediction | 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 |