| Index | Abbreviation | Units | Longname |
| 1 | AERMR01 | kg kg**-1 | Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio |
| 2 | AERMR02 | kg kg**-1 | Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio |
| 3 | AERMR03 | kg kg**-1 | Sea Salt Aerosol (5 - 20 um) Mixing Ratio |
| 4 | AERMR04 | kg kg**-1 | Dust Aerosol (0.03 - 0.55 um) Mixing Ratio |
| 5 | AERMR05 | kg kg**-1 | Dust Aerosol (0.55 - 0.9 um) Mixing Ratio |
| 6 | AERMR06 | kg kg**-1 | Dust Aerosol (0.9 - 20 um) Mixing Ratio |
| 7 | AERMR07 | kg kg**-1 | Hydrophobic Organic Matter Aerosol Mixing Ratio |
| 8 | AERMR08 | kg kg**-1 | Hydrophilic Organic Matter Aerosol Mixing Ratio |
| 9 | AERMR09 | kg kg**-1 | Hydrophobic Black Carbon Aerosol Mixing Ratio |
| 10 | AERMR10 | kg kg**-1 | Hydrophilic Black Carbon Aerosol Mixing Ratio |
| 11 | AERMR11 | kg kg**-1 | Sulphate Aerosol Mixing Ratio |
| 12 | AERMR12 | kg kg**-1 | Aerosol type 12 mixing ratio |
| 16 | AERGN01 | kg m**-2 | Aerosol type 1 source/gain accumulated |
| 17 | AERGN02 | kg m**-2 | Aerosol type 2 source/gain accumulated |
| 18 | AERGN03 | kg m**-2 | Aerosol type 3 source/gain accumulated |
| 19 | AERGN04 | kg m**-2 | Aerosol type 4 source/gain accumulated |
| 20 | AERGN05 | kg m**-2 | Aerosol type 5 source/gain accumulated |
| 21 | AERGN06 | kg m**-2 | Aerosol type 6 source/gain accumulated |
| 22 | AERGN07 | kg m**-2 | Aerosol type 7 source/gain accumulated |
| 23 | AERGN08 | kg m**-2 | Aerosol type 8 source/gain accumulated |
| 24 | AERGN09 | kg m**-2 | Aerosol type 9 source/gain accumulated |
| 25 | AERGN10 | kg m**-2 | Aerosol type 10 source/gain accumulated |
| 26 | AERGN11 | kg m**-2 | Aerosol type 11 source/gain accumulated |
| 27 | AERGN12 | kg m**-2 | Aerosol type 12 source/gain accumulated |
| 31 | AERLS01 | kg m**-2 | Aerosol type 1 sink/loss accumulated |
| 32 | AERLS02 | kg m**-2 | Aerosol type 2 sink/loss accumulated |
| 33 | AERLS03 | kg m**-2 | Aerosol type 3 sink/loss accumulated |
| 34 | AERLS04 | kg m**-2 | Aerosol type 4 sink/loss accumulated |
| 35 | AERLS05 | kg m**-2 | Aerosol type 5 sink/loss accumulated |
| 36 | AERLS06 | kg m**-2 | Aerosol type 6 sink/loss accumulated |
| 37 | AERLS07 | kg m**-2 | Aerosol type 7 sink/loss accumulated |
| 38 | AERLS08 | kg m**-2 | Aerosol type 8 sink/loss accumulated |
| 39 | AERLS09 | kg m**-2 | Aerosol type 9 sink/loss accumulated |
| 40 | AERLS10 | kg m**-2 | Aerosol type 10 sink/loss accumulated |
| 41 | AERLS11 | kg m**-2 | Aerosol type 11 sink/loss accumulated |
| 42 | AERLS12 | kg m**-2 | Aerosol type 12 sink/loss accumulated |
| 46 | AERPR | kg kg**-1 | Aerosol precursor mixing ratio |
| 47 | AERSM | kg kg**-1 | Aerosol small mode mixing ratio |
| 48 | AERLG | kg kg**-1 | Aerosol large mode mixing ratio |
| 49 | AODPR | dimensionless | Aerosol precursor optical depth |
| 50 | AODSM | dimensionless | Aerosol small mode optical depth |
| 51 | AODLG | dimensionless | Aerosol large mode optical depth |
| 52 | AERDEP | kg s**2 m**-5 | Dust emission potential |
| 53 | AERLTS | m s**-1 | Lifting threshold speed |
| 54 | AERSCC | % | Soil clay content |
| 61 | CO2 | kg kg**-1 | Carbon Dioxide |
| 62 | CH4 | kg kg**-1 | Methane |
| 63 | N2O | kg kg**-1 | Nitrous oxide |
| 64 | TCCO2 | kg m**-2 | Total column Carbon Dioxide |
| 65 | TCCH4 | kg m**-2 | Total column Methane |
| 66 | TCN2O | kg m**-2 | Total column Nitrous oxide |
| 67 | CO2OF | kg m**-2 s**-1 | Ocean flux of Carbon Dioxide |
| 68 | CO2NBF | kg m**-2 s**-1 | Natural biosphere flux of Carbon Dioxide |
| 69 | CO2APF | kg m**-2 s**-1 | Anthropogenic emissions of Carbon Dioxide |
| 70 | CH4F | kg m**-2 s**-1 | Methane Surface Fluxes |
| 71 | KCH4 | s**-1 | Methane loss rate due to radical hydroxyl (OH) |
| 80 | CO2FIRE | kg m**-2 s**-1 | Wildfire flux of Carbon Dioxide |
| 81 | COFIRE | kg m**-2 s**-1 | Wildfire flux of Carbon Monoxide |
| 82 | CH4FIRE | kg m**-2 s**-1 | Wildfire flux of Methane |
| 83 | NMHCFIRE | kg m**-2 s**-1 | Wildfire flux of Non-Methane Hydro-Carbons |
| 84 | H2FIRE | kg m**-2 s**-1 | Wildfire flux of Hydrogen |
| 85 | NOXFIRE | kg m**-2 s**-1 | Wildfire flux of Nitrogen Oxides NOx |
| 86 | N2OFIRE | kg m**-2 s**-1 | Wildfire flux of Nitrous Oxide |
| 87 | PM2P5FIRE | kg m**-2 s**-1 | Wildfire flux of Particulate Matter PM2.5 |
| 88 | TPMFIRE | kg m**-2 s**-1 | Wildfire flux of Total Particulate Matter |
| 89 | TCFIRE | kg m**-2 s**-1 | Wildfire flux of Total Carbon in Aerosols |
| 90 | OCFIRE | kg m**-2 s**-1 | Wildfire flux of Organic Carbon |
| 91 | BCFIRE | kg m**-2 s**-1 | Wildfire flux of Black Carbon |
| 92 | CFIRE | kg m**-2 s**-1 | Wildfire overall flux of burnt Carbon |
| 93 | C4FFIRE | dimensionless | Wildfire fraction of C4 plants |
| 94 | VEGFIRE | dimensionless | Wildfire vegetation map index |
| 95 | CCFIRE | dimensionless | Wildfire Combustion Completeness |
| 96 | FLFIRE | kg m**-2 | Wildfire Fuel Load |
| 97 | BFFIRE | dimensionless | Wildfire fraction of area burnt |
| 98 | OAFIRE | m**2 | Wildfire observed area |
| 99 | FRPFIRE | W m**-2 | Wildfire radiative power |
| 100 | CRFIRE | kg m**-2 s**-1 | Wildfire combustion rate |
| 121 | NO2 | kg kg**-1 | Nitrogen dioxide |
| 122 | SO2 | kg kg**-1 | Sulphur dioxide |
| 123 | CO | kg kg**-1 | Carbon monoxide |
| 124 | HCHO | kg kg**-1 | Formaldehyde |
| 125 | TCNO2 | kg m**-2 | Total column Nitrogen dioxide |
| 126 | TCSO2 | kg m**-2 | Total column Sulphur dioxide |
| 127 | TCCO | kg m**-2 | Total column Carbon monoxide |
| 128 | TCHCHO | kg m**-2 | Total column Formaldehyde |
| 129 | NOX | kg kg**-1 | Nitrogen Oxides |
| 130 | TCNOX | kg m**-2 | Total Column Nitrogen Oxides |
| 131 | GRG1 | kg kg**-1 | Reactive tracer 1 mass mixing ratio |
| 132 | TCGRG1 | kg m**-2 | Total column GRG tracer 1 |
| 133 | GRG2 | kg kg**-1 | Reactive tracer 2 mass mixing ratio |
| 134 | TCGRG2 | kg m**-2 | Total column GRG tracer 2 |
| 135 | GRG3 | kg kg**-1 | Reactive tracer 3 mass mixing ratio |
| 136 | TCGRG3 | kg m**-2 | Total column GRG tracer 3 |
| 137 | GRG4 | kg kg**-1 | Reactive tracer 4 mass mixing ratio |
| 138 | TCGRG4 | kg m**-2 | Total column GRG tracer 4 |
| 139 | GRG5 | kg kg**-1 | Reactive tracer 5 mass mixing ratio |
| 140 | TCGRG5 | kg m**-2 | Total column GRG tracer 5 |
| 141 | GRG6 | kg kg**-1 | Reactive tracer 6 mass mixing ratio |
| 142 | TCGRG6 | kg m**-2 | Total column GRG tracer 6 |
| 143 | GRG7 | kg kg**-1 | Reactive tracer 7 mass mixing ratio |
| 144 | TCGRG7 | kg m**-2 | Total column GRG tracer 7 |
| 145 | GRG8 | kg kg**-1 | Reactive tracer 8 mass mixing ratio |
| 146 | TCGRG8 | kg m**-2 | Total column GRG tracer 8 |
| 147 | GRG9 | kg kg**-1 | Reactive tracer 9 mass mixing ratio |
| 148 | TCGRG9 | kg m**-2 | Total column GRG tracer 9 |
| 149 | GRG10 | kg kg**-1 | Reactive tracer 10 mass mixing ratio |
| 150 | TCGRG10 | kg m**-2 | Total column GRG tracer 10 |
| 151 | SFNOX | kg m**-2 s**-1 | Surface flux Nitrogen oxides |
| 152 | SFNO2 | kg m**-2 s**-1 | Surface flux Nitrogen dioxide |
| 153 | SFSO2 | kg m**-2 s**-1 | Surface flux Sulphur dioxide |
| 154 | SFCO2 | kg m**-2 s**-1 | Surface flux Carbon monoxide |
| 155 | SFHCHO | kg m**-2 s**-1 | Surface flux Formaldehyde |
| 156 | SFGO3 | kg m**-2 s**-1 | Surface flux GEMS Ozone |
| 157 | SFGR1 | kg m**-2 s**-1 | Surface flux reactive tracer 1 |
| 158 | SFGR2 | kg m**-2 s**-1 | Surface flux reactive tracer 2 |
| 159 | SFGR3 | kg m**-2 s**-1 | Surface flux reactive tracer 3 |
| 160 | SFGR4 | kg m**-2 s**-1 | Surface flux reactive tracer 4 |
| 161 | SFGR5 | kg m**-2 s**-1 | Surface flux reactive tracer 5 |
| 162 | SFGR6 | kg m**-2 s**-1 | Surface flux reactive tracer 6 |
| 163 | SFGR7 | kg m**-2 s**-1 | Surface flux reactive tracer 7 |
| 164 | SFGR8 | kg m**-2 s**-1 | Surface flux reactive tracer 8 |
| 165 | SFGR9 | kg m**-2 s**-1 | Surface flux reactive tracer 9 |
| 166 | SFGR10 | kg m**-2 s**-1 | Surface flux reactive tracer 10 |
| 181 | R | kg kg**-1 | Radon |
| 182 | SF6 | kg kg**-1 | Sulphur Hexafluoride |
| 183 | TCR | kg m**-2 | Total column Radon |
| 184 | TCSF6 | kg m**-2 | Total column Sulphur Hexafluoride |
| 185 | SF6APF | kg m**-2 s**-1 | Anthropogenic Emissions of Sulphur Hexafluoride |
| 203 | GO3 | kg kg**-1 | GEMS Ozone |
| 206 | GTCO3 | kg m**-2 | GEMS Total column ozone |
| 207 | AOD550 | - | Total Aerosol Optical Depth at 550nm |
| 208 | SSAOD550 | - | Sea Salt Aerosol Optical Depth at 550nm |
| 209 | DUAOD550 | - | Dust Aerosol Optical Depth at 550nm |
| 210 | OMAOD550 | - | Organic Matter Aerosol Optical Depth at 550nm |
| 211 | BCAOD550 | - | Black Carbon Aerosol Optical Depth at 550nm |
| 212 | SUAOD550 | - | Sulphate Aerosol Optical Depth at 550nm |
| 213 | AOD469 | - | Total Aerosol Optical Depth at 469nm |
| 214 | AOD670 | - | Total Aerosol Optical Depth at 670nm |
| 215 | AOD865 | - | Total Aerosol Optical Depth at 865nm |
| 216 | AOD1240 | - | Total Aerosol Optical Depth at 1240nm |