GRIB2 - TABLE 4.2-0-4

PARAMETERS FOR DISCIPLINE 0
CATEGORY 4

(Meteorological products, Shortwave Radiation category)

In Section 0, Octet 7 = 0
In Section 4, Octet 10 = 4

Revised 09/11/2025
Red text depicts changes made since 05/13/2025


Number
(In Section 4, octet 11)
 Parameter Units
 Abbrev
0
 Net Shortwave Radiation Flux (Surface) (see Note 1) W m-2
 NSWRS
1
 Net Shortwave Radiation Flux (Top of Atmosphere) (see Note 1) W m-2 NSWRT
2
 Shortwave Radiation Flux (see Note 1) W m-2 SWAVR
3
 Global Radiation Flux W m-2 GRAD
4
 Brightness Temperature
 K
 BRTMP
5
 Radiance (with respect to wavenumber)
 W m-1 sr-1 LWRAD
6
 Radiance (with respect to wavelength)
 W m-3 sr-1 SWRAD
7
 Downward Shortwave Radiation Flux W m-2 DSWRF
8
 Upward Shortwave Radiation Flux W m-2 USWRF
9
 Net Shortwave Radiation Flux W m-2 NSWRF
10
 Photosynthetically Active Radiation W m-2 PHOTAR
11
 Net Shortwave Radiation Flux, Clear Sky W m-2 NSWRFCS
12
 Downward UV Radiation W m-2 DWUVR
13
 Direct Shortwave Radiation Flux W m-2 DSWRFLX
14
 Diffuse Shortwave Radiation Flux W m-2 DIFSWRF
15
 Upward UV radiation emitted/reflected from the Earth's surface W m-2 UVVEARTH
16-49
 Reserved

50
 UV Index (Under Clear Sky) (see Note 2) Numeric UVIUCS
51
 UV Index (see Note 2) Numeric UVI
52
 Downward Shortwave Radiation Flux, Clear Sky W m-2 DSWRFCS
53
 Upward Shortwave Radiation Flux, Clear Sky W m-2 USWRFCS
54
 Direct normal shortwave radiation flux, (see Note 3) W m-2 DNSWRFLX
55
 UV visible albedo for diffuse radiation % UVALBDIF
56
 UV visible albedo for direct radiation % UVALBDIR
57
 UV visible albedo for direct radiation, geometric component % UBALBDIRG
58
 UV visible albedo for direct radiation, isotropic component % UVALBDIRI
59
 UV visible albedo for direct radiation, volumetric component % UVBDIRV
60
 Photosynthetically active radiation flux, clear sky W m-2 PHOARFCS
61
 Direct shortwave radiation flux, clear sky W m-2 DSWRFLXCS
62
 Direct Normal Shortwave Radiation Flux, Clear Sky (see Note 3) W m-2 DNSWRFLXCS
63
 Diffuse Shortwave Radiation Flux, Clear Sky W m-2 DFSWRFLXCS
64-191
 Reserved

192-254
 Reserved for Local Use

192
 Downward Shortwave Radiation Flux W m-2 DSWRF
193
 Upward Shortwave Radiation Flux W m-2 USWRF
194
 UV-B Downward Solar Flux W m-2 DUVB
195
 Clear sky UV-B Downward Solar Flux W m-2 CDUVB
196
 Clear Sky Downward Solar Flux W m-2 CSDSF
197
 Solar Radiative Heating Rate K s-1 SWHR
198
 Clear Sky Upward Solar Flux W m-2 CSUSF
199
 Cloud Forcing Net Solar Flux W m-2 CFNSF
200
 Visible Beam Downward Solar Flux W m-2 VBDSF
201
 Visible Diffuse Downward Solar Flux W m-2 VDDSF
202
 Near IR Beam Downward Solar Flux W m-2 NBDSF
203
 Near IR Diffuse Downward Solar Flux W m-2 NDDSF
204
 Downward Total Radiation Flux W m-2 DTRF
205
 Upward Total Radiation Flux W m-2 UTRF
206
 Diffuse Shortwave Radiation Flux, Clear Sky W m-2 DFSWRFLXCS
255
 Missing



Notes:

(1)  Parameter deprecated - See Regulation 92.6.2 and use another parameter instead.

(2)  The Global Solar UVI is formulated using the International Commission on Illumination (CIE) reference action spectrum for UV-induced erythema on the human skin (ISO17166:1999/CIE S 007/E-1998). It is a measure of the UV radiation that is relevant to and defined for a horizontal surface. The UVI is a unitless quantity defined by the formula:
πΌπ‘ˆπ‘‰=π‘˜π‘’π‘Ÿ βˆ™250π‘›π‘šβˆ«400π‘›π‘š πΈπœ†βˆ™π‘†π‘’π‘Ÿ(πœ†)π‘‘πœ†
where πΈπœ† is the solar spectral irradiance expressed in W / (m2Β·nanometre) at wavelength πœ† and π‘‘πœ† is the wave-length interval used in the summation. π‘†π‘’π‘Ÿ πœ† is the erythema reference action spectrum, and π‘˜π‘’π‘Ÿ is a constant equal to 40 m2 / W.

(3)  Normal flux is on a surface lifted to be normal to sun rays.


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