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Monthly Operational Means Surface Forecast Data Sets
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Ordering
Instructions and Forms (in pdf format)
This part includes a brief description and the order forms of this specific Data Set.
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Description:
- period supported -July 1985 to current date;
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each parameter is stored as a field of grid point values, in latitude rows starting at the north and working southwards; within each row values run from west to east starting at the 0° meridian;
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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;
The changes to this archive are as follows:
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July 1985 |
Internal data representation is in N80 Gaussian grid (80 lines of latitude between the pole and the equator for each hemisphere, with a regular spacing of 1.125° between points along each latitude row) Data consist of daily 10 day forecasts from base time 1200 UTC Forecast steps are available 6 hourly to HH+120 then 12 hourly to HH+240 Fields available: surface pressure, snow depth, large scale precipitation, convective precipitation, snowfall, boundary layer dissipation, surface sensible heat flux, surface latent heat flux, MSL pressure, total cloud cover, u- and v-components of wind at 10m, 2 metre temperature, 2 metre dewpoint temperature, surface solar radiation, surface thermal radiation, top solar radiation, top thermal radiation, east-west surface stress, north-south surface stress, evaporation, surface temperature, deep soil temperature, surface soil wetness, deep soil wetness |
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July 1986 |
Fields added: low cloud cover, medium cloud cover, high cloud cover, latitudional gravity wave stress, meridional gravity wave stress, gravity wave dissipation |
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April 1987 |
Fields added: skin reservoir content, maximum temperature at 2m since previous post processing, minimum temperature at 2m since previous post processing, |
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October 1991 |
Internal data representation is in an N160 Quasi-regular Gaussian grid (160 lines with varying numbers of points along each row) Field added: runoff |
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August 1993 |
Field added: skin temperature Surface temperature, deep soil temperature replaced by soil temperature levels 1, 2, 3 and 4 Surface soil wetness, deep soil wetness replaced by soil wetness levels 1, 2, 3 and 4 |
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March 1994 |
Fields added: forecast albedo, forecast surface roughness, forecast log surface roughness for heat |
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April 1995 |
Fields added: total column water, total column water vapour |
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May 1997 |
Fields added: surface solar radiation downward, surface thermal radiation downward |
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February 1999 |
Forecast steps available 6 hourly to HH+240 |
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July 2000 |
Fields added: sea ice cover, snow albedo, snow density, sea surface temperature, evaporation of snow, snow melt, wind gust at 10 metres, large scale precipitation fraction, boundary layer height, sunshine duration, top net solar radiation clear sky, top upward thermal radiation clear sky, surface net solar radiation clear sky, surface net thermal radiation clear sky, temperature of snow layer, ice surface temperature layers 1, 2, 3 and 4 Soil wetness levels 1, 2, 3 and 4 replaced by volumetric soil wetness layers 1, 2, 3 and 4 |
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September 2000 |
Field added: total column ozone; the ozone field does not currently use assimilated data. Currently the equations used do not produce the ozone holes at the North and South poles |
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December 2000 |
Internal data representation is in aN256 Quasi-regular Gaussian grid (256 lines between the pole and the equator, with varying numbers of points along each row) |
| February 2006 | Internal data representation is in a N400 Quasi-regular Gaussian grid (400 lines between the pole and the equator, with varying numbers of points along each row) |
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26.01.2006 |
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