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PARAMETERS
Below is a list of all agreed upon parameters. Participating Centers are expected to produce output fields in GRIB2 data format and with consistent units. All units are defined by the WMO in the GRIB2 manual . For more information please refer to Guide to the WMO Table Driven Code Form.
Rules for parameter exchanges and GRIB2 encoding can be found here.
Pressure level parameters
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The following parameters are available on ten pressure levels (1000, 925, 850, 700, 500, 300, 200, 100, 50 and 10 hPa) |
The following parameters are available on seven pressure levels (1000, 925, 850, 700, 500, 300 and 200 hPa) Name | Abbreviation | Unit | Specific humidity | q | kg kg-1 |
The following parameter are available on 1 pressure level (500 hPa) Name | Abbreviation | Unit | Vertical velocity | w | pa s-1 |
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Potential temperature level parameters
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The following parameters are available on one potential temperature level (320 K) Name | Abbreviation | Unit | Potential vorticity | pv | K m2 kg-1 s-1 |
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Single-level parameters
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The following parameters are available on single levels Name | Abbreviation | Unit | 10 metre u-velocity | 10u | m s-1 | 10 metre v-velocity | 10v | m s-1 | CAPE | cape | J kg-1 | Skin temperature | skt | K | Snow depth water equivalent | sd | kg m-2 | Snow density | rsn | kg m-3 | Snow fall water equivalent | sf | kg m-2 | Snow albedo | asn | % | Soil moisture top 20 cm | sm20
| kg m-3 | Soil moisture top 100 cm | sm100 | kg m-3 |
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