GRIB2 - TABLE 4.2-2-0

PARAMETERS FOR DISCIPLINE 2
CATEGORY 0

(Land Surface products, Vegetation/Biomass category)

In Section 0, Octet 7 = 2
In Section 4, Octet 10 = 0

Revised 12/07/2023
Red text depicts changes made since 06/29/2022



Number
(In Section 4, octet 11)
Parameter Units
Abbrev
0
Land Cover (0=sea, 1=land)
Proportion LAND
1
Surface Roughness
m
SFCR
2 Soil Temperature (Parameter Deprecated, see Note 3) K TSOIL
3 Soil Moisture Content (Parameter Deprecated, see Note 1)
4
Vegetation
%
VEG
5
Water Runoff
kg m-2 WATR
6
Evapotranspiration (See Note 6) kg-2 s-1
EVAPT
7
Model Terrain Height
m
MTERH
8
Land Use
See Table 4.212
LANDU
9
Volumetric Soil Moisture Content (see Note 2) Proportion
SOILW
10
Ground Heat Flux (see Note 1) W m-2 GFLUX
11
Moisture Availability %
MSTAV
12
Exchange Coefficient kg m-2 s-1 SFEXC
13
Plant Canopy Surface Water kg m-2 CNWAT
14
Blackadar's Mixing Length Scale m
BMIXL
15
Canopy Conductance m s-1 CCOND
16
Minimal Stomatal Resistance s m-1 RSMIN
17
Wilting Point (Parameter Deprecated, see Note 1) Proportion
WILT
18
Solar parameter in canopy conductance Proportion
RCS
19
Temperature parameter in canopy Proportion RCT
20 Humidity parameter in canopy conductance Proportion RCQ
21
Soil moisture parameter in canopy conductance Proportion RCSOL
22 Soil Moisture (Parameter Deprecated, See Note 3)
23 Column-Integrated Soil Water (Parameter Deprecated, See Note 3) kg m-2 CISOILW
24 Heat Flux W m-2 HFLUX
25 Volumetric Soil Moisture m3 m-3 VSOILM
26 Wilting Point kg m-3 WILT
27 Volumetric Wilting Point m3 m-3 VWILTP
28 Leaf Area Index Numeric LEAINX
29 Evergreen Forest Cover Proportion EVGFC
30 Deciduous Forest Cover Proportion DECFC
31 Normalized Differential Vegetation Index (NDVI) Numeric NDVINX
32 Root Depth of Vegetation m RDVEG
33 Water Runoff and Drainage (see Note 4) kg m-2 WROD
34 Surface Water Runoff (see Note 4) kg m-2 SFCWRO
35 Tile Class See Table 4.243
TCLASS
36 Tile Fraction Proportion TFRCT
37 Tile Percentage % TPERCT
38 Soil Volumetric Ice Content (Water Equivalent) (See Note 5) m3 m-3 SOILVIC
39 Evapotranspiration Rate kg m-2 s-1 EVAPTRAT
40 Potential Evapotranspiration Rate kg m-2 s-1 PEVAPTRAT
41 Snow Melt Rate kg m-2 s-1 SMRATE
42 Water Runoff and Drainage Rate kg m-2 s-1 WRDRATE
43 Drainage direction See Table 4.250
DRAINDIR
44 Upstream Area m2 UPSAREA
45 Wetland Cover Proportion WETCOV
46 Wetland Type See Table 4.239
WETTYPE
47 Irrigation Cover Proportion IRRCOV
48 C4 Crop Cover (see Note 7) Proportion CROPCOV
49 C4 Grass Cover (see Note 7) Proportion GRASSCOV
50 Skin Resovoir Content kg m-2 SKINRC
51 Surface Runoff Rate kg m-2 s-1 SURFRATE
52 Subsurface Runoff Rate kg m-2 s-1 SUBSRATE
53 Low-Vegetation Cover Proportion LOVEGCOV
54 High-Vegetation Cover Proportion HIVEGCOV
55 Leaf Area Index (Low-Vegetation) m2 m-2 LAILO
56 Leaf Area Index (High-Vegetation) m2 m-2 LAIHI
57 Type of Low-Vegetation See Table 4.234
TYPLOVEG
58 Type of High-Vegetation See Table 4.234
TYPHIVEG
59 Net Ecosystem Exchange Flux (see Note 8) kg-2 s-1 NECOFLUX
60 Gross Primary Production Flux (see Note 8) kg-2 s-1 GROSSFLUX
61 Ecosystem Respiration Flux (see Note 8) kg-2 s-1 ECORFLUX
62 Emissivity Proportion EMISS
63 Canopy air temperature K CANTMP
64-191 Reserved
192-254 Reserved for Local Use
192 Volumetric Soil Moisture Content Fraction SOILW
193 Ground Heat Flux W m-2 GFLUX
194
Moisture Availability %
MSTAV
195
Exchange Coefficient (kg m-3) (m s-1)
SFEXC
196
Plant Canopy Surface Water kg m-2 CNWAT
197
Blackadar’s Mixing Length Scale m
BMIXL
198
Vegetation Type Integer (0-13) VGTYP
199
Canopy Conductance m s-1 CCOND
200
Minimal Stomatal Resistance s m-1 RSMIN
201
Wilting Point Fraction
WILT
202
Solar parameter in canopy conductance Fraction
RCS
203
Temperature parameter in canopy conductance Fraction RCT
204
Humidity parameter in canopy conductance Fraction RCQ
205
Soil moisture parameter in canopy conductance Fraction RCSOL
206
Rate of water dropping from canopy to ground
RDRIP
207
Ice-free water surface %
ICWAT
208
Surface exchange coefficients for T and Q divided by delta z m s-1 AKHS
209 Surface exchange coefficients for U and V divided by delta z m s-1 AKMS
210
Vegetation canopy temperature K
VEGT
211
Surface water storage kg m-2
SSTOR
212
Liquid soil moisture content (non-frozen) kg m-2
LSOIL
213
Open water evaporation (standing water) W m-2
EWATR
214
Groundwater recharge kg m-2
GWREC
215
Flood plain recharge kg m-2
QREC
216
Roughness length for heat m
SFCRH
217
Normalized Difference Vegetation Index
NDVI
218
Land-sea coverage (nearest neighbor) [land=1,sea=0]
LANDN
219
Asymptotic mixing length scale m
AMIXL
220
Water vapor added by precip assimilation kg m-2
WVINC
221
Water condensate added by precip assimilation kg m-2
WCINC
222
Water Vapor Flux Convergance (Vertical Int) kg m-2
WVCONV
223
Water Condensate Flux Convergance (Vertical Int) kg m-2
WCCONV
224
Water Vapor Zonal Flux (Vertical Int) kg m-2
WVUFLX
225
Water Vapor Meridional Flux (Vertical Int) kg m-2
WVVFLX
226
Water Condensate Zonal Flux (Vertical Int) kg m-2
WCUFLX
227
Water Condensate Meridional Flux (Vertical Int) kg m-2
WCVFLX
228
Aerodynamic conductance m s-1 ACOND
229
Canopy water evaporation W m-2
EVCW
230
Transpiration W m-2 TRANS
231 Seasonally Minimum Green Vegetation Fraction (over 1-year period) % VEGMIN
232 Seasonally Maximum Green Vegetation Fraction (over 1-year period) % VEGMAX
233 Land Fraction Fraction LANDFRC
234 Lake Fraction Fraction LAKEFRC
235 Precipitation Advected Heat Flux W m-2 PAHFLX
236 Water Storage in Aquifer kg m-2 WATERSA
237 Evaporation of Intercepted Water kg m-2 EIWATER
238 Plant Transpiration kg m-2 PLANTTR
239 Soil Surface Evaporation kg m-2 SOILSE
255
Missing




Notes:

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

(2) It is recommended not to use this parameter, but another one with a more descriptive unit.

(3) Parameter deprecated. Use another parameter in parameter category 3: Soil Products instead.

(4) Statistical process 1 (Accumulation) does not change units.

(5) For parameter 38 (Parameter category 0), ice volume is expressed as if the ice content were melted to liquid water and then its volume measured in the liquid state.
This may be understood in the same manner as water equivalent snow depth.

(6) The listed units for this parameter appear not to be appropriate for evapotranspiration. Instead, it is recommended to use parameter 39 with statistical process 1 (accumulation) in order to report evapotranspiration in units of kg m-2.

(7) A C4 plant is a type of plant that uses a specific photosynthesis mechanism (C4 photosynthesis) in order to avoid photorespiration. Other types of plants are C3 and CAM.

(8) This parameter can be used with templates for chemical constituents to specify a chemical species if needed, for instance: Net ecosystem CO2 exchange flux or Net ecosystem CH4 exchange flux.




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