Variable:
Snow cover
Requirements defined for Snow 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, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12 | Snow cover | Land surface | CLIC (deprecated) | 10 % 13 % 20 % |
1 km 2.9 km 25 km |
24 h 41 h 5 d |
7 d 11 d 30 d |
Global land | reasonable | 1998-10-29 | WCRP | ||||||||||
| 47 | Snow cover | Land surface | 2.9 Agricultural Meteorology | 2 % 4 % 10 % |
1 km 2.2 km 10 km |
5 d 6 d 7 d |
24 h 44 h 6 d |
Global land | reasonable | 2003-10-20 | ET ODRRGOS | Evaluation of crop wintering | |||||||||
| 108 | Snow cover | Land surface | Climate-AOPC (deprecated) | 10 % 13 % 20 % |
100 km 200 km 500 km |
24 h 2 d 7 d |
6 h 12 h 24 h |
Global land | firm | 2007-07-19 | AOPC | For model assimilation. Decadal changes may be of order 5% (N. Nicholls et al. 1996 Observed Climate Variability and Change. Chapter 2 of Climate Change 1995 (IPCC Second Assessment).) | |||||||||
| 220 | Snow cover | Land surface | GEWEX (deprecated) | 10 % 20 % 50 % |
15 km 50 km 250 km |
24 h 2 d 7 d |
30 d 45 d 90 d |
Global land | reasonable | 1998-10-29 | WCRP | ||||||||||
| 299 | Snow cover | Land surface | 2.1 Global Numerical Weather Prediction and Real-time Monitoring | 10 % 20 % 50 % |
5 km 15 km 100 km |
3 h 24 h 5 d |
3 h 24 h 5 d |
Global land | firm | 2009-02-10 | John Eyre | ||||||||||
| 375 | Snow cover | Land surface | 2.2 High-Resolution Numerical Weather Prediction | 5 % 15 % 20 % |
1 km 5 km 20 km |
60 min 3 h 12 h |
60 min 3 h 12 h |
Global land | reasonable | 2010-02-01 | JF Mahfouf | ||||||||||
| 446 | Snow cover | Land surface | 2.3 Nowcasting / Very Short-Range Forecasting | 10 % 13 % 20 % |
5 km 10 km 50 km |
60 min 6 h 24 h |
60 min 2 h 6 h |
Global land | reasonable | 2013-04-03 | P. Ambrosetti | ||||||||||
| 677 | Snow cover | Land surface | Climate-TOPC (deprecated) | 5 % 7 % 10 % |
0.1 km 0.45 km 10 km |
24 h 3 d 30 d |
30 h 3 d 15 d |
Global land | firm | 2007-07-19 | TOPC | For impact and hydrological cycle studies. Snow cover area | |||||||||
| 824 | Snow cover | Land surface | 2.5 Atmospheric Climate Monitoring | 0.5 | 5 % | 4 % | 0.1 km 1 km |
24 h | Global | reasonable | 2025-08-08 | GCOS-200: The Global Observing System for Climate: Implementation Needs (Published 2016) | Requirements in the GCOS-200 IP, Annex A, are only specified at the goal level. | 8 Aug 2025: PoC of AA 4.2 requested to archive these requirements under 2.5, because this GCOSTOPC variable will be moved under AA .4.2. The change was supported by PoC and the owner of AA 2.5. |