GRIB2 - TABLE 4.2-0-20

PARAMETERS FOR DISCIPLINE 0
CATEGORY 20

(Meteorological products, Atmospheric Chemical Constituents category)

In Section 0, Octet 7 = 0
In Section 4, Octet 10 = 20

Revised 11/26/2019
Red text depicts changes made since 05/28/2019



Number
(In Section 4, octet 11)
Parameter Units
Abbrev
0 Mass Density (Concentration) kg m-3 MASSDEN
1 Column-Integrated Mass Density (See Note 1) kg m-2 COLMD
2 Mass Mixing Ratio (Mass Fraction in Air) kg kg-1 MASSMR
3 Atmosphere Emission Mass Flux kg m-2s-1 AEMFLX
4 Atmosphere Net Production Mass Flux kg m-2s-1 ANPMFLX
5 Atmosphere Net Production And Emision Mass Flux
kg m-2s-1 ANPEMFLX
6 Surface Dry Deposition Mass Flux kg m-2s-1 SDDMFLX
7 Surface Wet Deposition Mass Flux kg m-2s-1 SWDMFLX
8 Atmosphere Re-Emission Mass Flux kg m-2s-1 AREMFLX
9 Wet Deposition by Large-Scale Precipitation Mass Flux kg m-2s-1 WLSMFLX
10 Wet Deposition by Convective Precipitation Mass Flux kg m-2s-1 WDCPMFLX
11 Sedimentation Mass Flux kg m-2s-1 SEDMFLX
12 Dry Deposition Mass Flux kg m-2s-1 DDMFLX
13 Transfer From Hydrophobic to Hydrophilic
kg kg-1s-1 TRANHH
14 Transfer From SO2 (Sulphur Dioxide) to SO4 (Sulphate) kg kg-1s-1 TRSDS
15 Dry deposition velocity m s-1 DDVEL
16 Mass mixing ratio with respect to dry air kg kg-1 MSSRDRYA
17 Mass mixing ratio with respect to wet air kg kg-1 MSSRWETA
18-49
Reserved

50 Amount in Atmosphere mol AIA
51 Concentration In Air mol m-3 CONAIR
52 Volume Mixing Ratio (Fraction in Air) mol mol-1 VMXR
53 Chemical Gross Production Rate of Concentration mol m-3s-1 CGPRC
54 Chemical Gross Destruction Rate of Concentration mol m-3s-1 CGDRC
55 Surface Flux mol m-2s-1 SFLUX
56 Changes Of Amount in Atmosphere (See Note 1) mol s-1 COAIA
57 Total Yearly Average Burden of The Atmosphere> mol TYABA
58 Total Yearly Average Atmospheric Loss (See Note 1) mol s-1 TYAAL
59 Aerosol Number Concentration (See Note 2) m-3 ANCON
60
Aerosol Specific Number Concentration (See Note 2) kg-1 ASNCON
61 Maximum of Mass Density (See Note 1) kg m-3 MXMASSD
62 Height of Mass Density m HGTMD
63 Column-Averaged Mass Density in Layer kg m-3 CAVEMDL
64 Mole fraction with respect to dry air mol mol-1 MOLRDRYA
65 Mole fraction with respect to wet air mol mol-1 MOLRWETA
66 Column-integrated in-cloud scavenging rate by precipitation kg m-2 s-1 CINCLDSP
67 Column-integrated below-cloud scavenging rate by precipitation kg m-2 s-1 CBLCLDSP
68 Column-integrated release rate from evaporating precipitation kg m-2 s-1 CIRELREP
69 Column-integrated in-cloud scavenging rate by large-scale precipitation kg m-2 s-1 CINCSLSP
70 Column-integrated below-cloud scavenging rate by large-scale precipitation kg m-2 s-1 CBECSLSP
71 Column-integrated release rate from evaporating large-scale precipitation kg m-2 s-1 CRERELSP
72 Column-integrated in-cloud scavenging rate by convective precipitation kg m-2 s-1 CINCSRCP
73 Column-integrated below-cloud scavenging rate by convective precipitation kg m-2 s-1 CBLCSRCP
74 Column-integrated release rate from evaporating convective precipitation kg m-2 s-1 CIRERECP
75 Wildfire flux kg m-2 s-1 WFIREFLX
76 Emission Rate kg kg-1 s-1 EMISFLX
77 Surface Emission flux kg m-2 s-1 SFCEFLX
78-99
Reserved

100 Surface Area Density (Aerosol) m-1 SADEN
101 Vertical Visual Range m ATMTK
102 Aerosol Optical Thickness Numeric AOTK
103 Single Scattering Albedo Numeric SSALBK
104 Asymmetry Factor
Numeric ASYSFK
105 Aerosol Extinction Coefficient
m-1 AECOEF
106 Aerosol Absorption Coefficient
m-1 AACOEF
107 Aerosol Lidar Backscatter from Satellite
m-1sr-1 ALBSAT
108 Aerosol Lidar Backscatter from the Ground m-1sr-1 ALBGRD
109 Aerosol Lidar Extinction from Satellite m-1 ALESAT
110 Aerosol Lidar Extinction from the Ground
m-1 ALEGRD
111 Angstrom Exponent Numeric ANGSTEXP
112 Scattering Aerosol Optical Thickness Numeric SCTAOTK
113-191
Reserved

192-254
Reserved for Local Use


255
Missing



Notes:

(1) First fixed surface and Second fixed surface of Code Table 4.5 (Fixed surface types and units) to define the vertical extent, i.e. First Fixed Surface can be set to 1 (Ground or Water surface) and second Fixed Surface set to 7 (Tropopause) for a restriction to the troposphere.
(2) The term "Number Density" is used as well for "Number Concentration" (code Number 59); Conversion factor between "Number Density" (59) and "Specific Number Concentration" (60) is "Mass Density" [kg m-3]



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