GRIB2 - CODE TABLE 4.2

PARAMETER NUMBER BY PRODUCT DISCIPLINE
AND PARAMETER CATEGORY

Revised 07/18/2013
Red text depicts changes made since 12/21/2012



Product Discipline 0 - Meteorological products
Parameter Category 0 Temperature
Parameter Category 1 Moisture
Parameter Category 2 Momentum
Parameter Category 3 Mass
Parameter Category 4 Short wave radiation
Parameter Category 5 Long wave radiation
Parameter Category 6 Cloud
Parameter Category 7 Thermodynamic stability indices
Parameter Category 13 Aerosols
Parameter Category 14 Trace gases (e.g. Ozone, CO2)
Parameter Category 15 Radar
Parameter Category 16 Forecast Radar Imagery
Parameter Category 17 Electrodynamics
Parameter Category 18 Nuclear/radiology
Parameter Category 19
Physical atmospheric Properties
Parameter Category 20 Atmospheric Chemical Constituents
21-189 Reserved
Parameter Category 190 CCITT IA5 string
Parameter Category 191 Miscellaneous
192-254
Reserved for Local Use
Parameter Category 192 Covariance
255 Missing

Product Discipline 1, Hydrologic products
Parameter Category 0 Hydrology Basic
Parameter Category 1 Hydrology Probabilities
Parameter Category 2 Inland Water and Sediment Properties
3-191 Reserved
192-254
Reserved for Local Use
255 Missing

Product Discipline 2, Land Surface products
Parameter Category 0 Vegetation/Biomass
Parameter Category 1
Agricultural/aquacultural special products
Parameter Category 2
Transportation related products
Parameter Category 3
Soil
Parameter Category 4 Fire Weather
5-191 Reserved
192-254
Reserved for Local Use
255 Missing

Product Discipline 3, Space products
Parameter Category 0 Image format
Parameter Category 1
Quantitative
2-191 Reserved
192-254
Reserved for Local Use
Parameter Category 192 Forecast Satellite Imagery
255 Missing

Product Discipline 4, Space Weather products
(Validation)
Parameter Category 0 Temperature
Parameter Category 1
Momentum
Parameter Category 2
Charged Particle Mass and Number
Parameter Category 3
Electric and Magnetic Fields
Parameter Category 4
Energetic Particles
Parameter Category 5
Waves
Parameter Category 6
Solar Electromagnetic Emissions
Parameter Category 7
Terrestrial Electromagnetic Emissions
Parameter Category 8
Imagery
Parameter Category 9
Ion-Neutral Coupling
10-191 Reserved
192-254
Reserved for Local Use
255 Missing

Product Discipline 10, Oceanographic products
Parameter Category 0 Waves
Parameter Category 1
Currents
Parameter Category 2
Ice
Parameter Category 3
Surface Properties
Parameter Category 4
Sub-surface Properties
5-190 Reserved
Parameter Category 191 Miscellaneous
192-254
Reserved for Local Use
255 Missing

Notes:

1.  By convention, the flux sign is positive if downward.

2.  When a new parameter is to be added to Code table 4.2 and more than one category applies, the choice of category should be made base on the intended use of product. The discipline and category are an important part of any product definition, so it is possible to have the same parameter name in more than one category. For example, "Water Temperature" in discipline 10 (Oceanographic Products), category 4 (sub-surface properties) is used to reporting water temperature in the ocean or open sea, and is not the same as "Water temperature" in discipline 1 (Hydrological Products), category 2 (Inland water and sediment properties) which is used for reporting water temperature in freshwater lakes and rivers.


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