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Seasonal Forecast Surface Data Set
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This part includes a brief description and the order forms
of this specific Data Set.
Description :
- The archive consists of two parts which are a hindcast archive from 1987 to 2001 and a current archive from 2002 onward;
- The hindcast archive for 1987 to 2000 has 5 ensemble members for each month except May and November when there are 41 ensemble members; in 2001 there are 5 ensemble members for January to April, June and July, 41 ensemble members for May and November and 40 ensemble members for August to October and December;
- The current archive (2002 onward) has 40 ensemble members for each month;
- The archive consists of an ensemble of forecasts from 0000 UTC on the first day of each month out to 4416 hours (184 days);
- Each value at each level is stored as a field of grid point values on a reduced N48 Gaussian grid;
- Data are stored
in FM 92 GRIB using sufficient bits to ensure that the values represented can
be retrieved to an accuracy consistent with the analysis method used;
Fields available:
6 hourly from step 6 : 2 metre temperature, 2 metre dewpoint temperature, 10 metre u and v wind components, total cloud cover; |
12 hourly from step 12 : mean sea level pressure plus the 6 hourly fields; |
24 hourly from step 24 : convective precipitation, East/West surface stress, evaporation, large scale precipitation, maximum temperature at 2 metres since previous post-processing, mean 2 metre temperature in past 24 hours, minimum temperature at 2 metres since previous post-processing, North/South surface stress, snow depth, snowfall, soil temperature levels 1 and 2, sunshine duration, surface latent heat flux, surface sensible heat flux, surface solar radiation, surface solar radiation downward, surface thermal radiation, surface thermal radiation downward, top solar radiation, top thermal radiation, volumetric soil wetness levels 1, 2, 3 and 4, wind gust at 10 metres plus the 12 hourly fields; Total precipitation is archived every 24 hours for forecasts since January 2002 (the current archive); geopotential
(orography) and land-sea mask are archived at step 0 only for forecasts since
September 1994; |
Order forms :
If you wish to make an order from this data set please download the following two Acrobat (PDF) files :| 1. Instructions and Standard Order forms (common for all data sets): |
24 KB |
| 2. Data Set Order form (to select data from this specific data set only) : |
 | 13.11.2003 |
 | © ECMWF |
