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| Name | Units | Variable name in CDS API | Shortname | Param ID | Access type | fc | an | Note |
| Acetone | kg kg-1 | acetone | ch3coch3 | 217052 | X | X | ||
| Acetone product | kg kg-1 | acetone_product | aco2 | 217053 | X | X | ||
| Aerosol extinction coefficient at 1064 nm | m-1 | aerosol_extinction_coefficient_1064nm | aerext1064 | 215182 | X | Only available from 26 September 2017 00UTC | ||
| Aerosol extinction coefficient at 355 nm | m-1 | aerosol_extinction_coefficient_355nm | aerext355 | 215180 | X | Only available from 26 September 2017 00UTC | ||
| Aerosol extinction coefficient at 532 nm | m-1 | aerosol_extinction_coefficient_532nm | aerext532 | 215181 | X | Only available from 26 September 2017 00UTC | ||
| Aldehydes | kg kg-1 | aldehydes | ald2 | 217012 | X | X | ||
| Amine | kg kg-1 | amine | nh2 | 217040 | X | X | ||
| Ammonia | kg kg-1 | ammonia | nh3 | 217019 | X | X | ||
| Ammonium | kg kg-1 | ammonium | nh4 | 217021 | X | X | ||
| Ammonium aerosol mass mixing ratio | kg kg-1 | ammonium_aerosol_mass_mixing_ratio | aermr18 | 210249 | Fast access | X | X | |
| Aerosol backscatter coefficient at 1064 nm (from ground) | m-1 sr-1 | attenuated_backscatter_due_to_aerosol_1064nm_from_ground | aerbackscatgnd1064 | 215188 | X | Only available from 26 September 2017 00UTC | ||
| Aerosol backscatter coefficient at 1064 nm (from top of atmosphere) | m-1 sr-1 | attenuated_backscatter_due_to_aerosol_1064nm_from_top_of_atmosphere | aerbackscattoa1064 | 215185 | X | Only available from 26 September 2017 00UTC | ||
| Aerosol backscatter coefficient at 355 nm (from ground) | m-1 sr-1 | attenuated_backscatter_due_to_aerosol_355nm_from_ground | aerbackscatgnd355 | 215186 | X | Only available from 26 September 2017 00UTC | ||
| Aerosol backscatter coefficient at 355 nm (from top of atmosphere) | m-1 sr-1 | attenuated_backscatter_due_to_aerosol_355nm_from_top_of_atmosphere | aerbackscattoa355 | 215183 | X | Only available from 26 September 2017 00UTC | ||
| Aerosol backscatter coefficient at 532 nm (from ground) | m-1 sr-1 | attenuated_backscatter_due_to_aerosol_532nm_from_ground | aerbackscatgnd532 | 215187 | X | Only available from 26 September 2017 00UTC | ||
| Aerosol backscatter coefficient at 532 nm (from top of atmosphere) | m-1 sr-1 | attenuated_backscatter_due_to_aerosol_532nm_from_top_of_atmosphere | aerbackscattoa532 | 215184 | X | Only available from 26 September 2017 00UTC | ||
| Carbon monoxide | kg kg-1 | carbon_monoxide | co | 210123 | Fast access | X | X | |
| Dimethyl sulfide | kg kg-1 | dimethyl_sulfide | dms | 217018 | X | X | ||
| Dinitrogen pentoxide | kg kg-1 | dinitrogen_pentoxide | n2o5 | 217033 | X | X | ||
| Dust Aerosol (0.03 - 0.55 um) Mixing Ratio | kg kg-1 | dust_aerosol_0.03-0.55um_mixing_ratio | aermr04 | 210004 | Fast access | X | X | |
| Dust Aerosol (0.55 - 0.9 um) Mixing Ratio | kg kg-1 | dust_aerosol_0.55-0.9um_mixing_ratio | aermr05 | 210005 | Fast access | X | X | |
| Dust Aerosol (0.9 - 20 um) Mixing Ratio | kg kg-1 | dust_aerosol_0.9-20um_mixing_ratio | aermr06 | 210006 | Fast access | X | X | |
| Ethane | kg kg-1 | ethane | c2h6 | 217045 | Fast access | X | X | |
| Ethanol | kg kg-1 | ethanol | c2h5oh | 217046 | X | X | ||
| Ethene | kg kg-1 | ethene | c2h4 | 217010 | X | X | ||
| Formaldehyde | kg kg-1 | formaldehyde | hcho | 210124 | Fast access | X | X | |
| Formic acid | kg kg-1 | formic_acid | hcooh | 217043 | X | X | ||
| Fraction of cloud cover | (0 - 1) | fraction_of_cloud_cover | cc | 248 | X | X | ||
| Geopotential | m2 s-2 | geopotential | z | 129 | X | X | ||
| Hydrogen peroxide | kg kg-1 | hydrogen_peroxide | h2o2 | 217003 | Fast access | X | X | |
| Hydroperoxy radical | kg kg-1 | hydroperoxy_radical | ho2 | 217028 | X | X | ||
| Hydrophilic Black Carbon Aerosol Mixing Ratio | kg kg-1 | hydrophilic_black_carbon_aerosol_mixing_ratio | aermr09 | 210009 | Fast access | X | X | |
| Hydrophilic Organic Matter Aerosol Mixing Ratio | kg kg-1 | hydrophilic_organic_matter_aerosol_mixing_ratio | aermr07 | 210007 | Fast access | X | X | |
| Hydrophobic Black Carbon Aerosol Mixing Ratio | kg kg-1 | hydrophobic_black_carbon_aerosol_mixing_ratio | aermr10 | 210010 | Fast access | X | X | |
| Hydrophobic Organic Matter Aerosol Mixing Ratio | kg kg-1 | hydrophobic_organic_matter_aerosol_mixing_ratio | aermr08 | 210008 | Fast access | X | X | |
| Hydroxyl radical | kg kg-1 | hydroxyl_radical | oh | 217030 | Fast access | X | X | |
| Isoprene | kg kg-1 | isoprene | c5h8 | 217016 | Fast access | X | X | |
| Lead | kg kg-1 | lead | pb | 217026 | X | X | ||
| Methacrolein MVK | kg kg-1 | methacrolein_mvk | ispd | 217050 | X | |||
| Methacrylic acid | kg kg-1 | methacrylic_acid | mcooh | 217044 | X | X | ||
| Methane | kg kg-1 | methane | ch4_c | 217004 | Fast access | X | X | |
| Methane sulfonic acid | kg kg-1 | methane_sulfonic_acid | msa | 217022 | X | X | ||
| Methanol | kg kg-1 | methanol | ch3oh | 217042 | X | X | ||
| Methyl glyoxal | kg kg-1 | methyl_glyoxal | ch3cocho | 217023 | X | X | ||
| Methyl peroxide | kg kg-1 | methyl_peroxide | ch3ooh | 217007 | X | X | ||
| Methylperoxy radical | kg kg-1 | methylperoxy_radical | ch3o2 | 217029 | X | X | ||
| Nitrate | kg kg-1 | nitrate | no3_a | 217051 | X | X | ||
| Nitrate coarse mode aerosol mass mixing ratio | kg kg-1 | nitrate_coarse_mode_aerosol_mass_mixing_ratio | aermr17 | 210248 | Fast access | X | X | |
| Nitrate fine mode aerosol mass mixing ratio | kg kg-1 | nitrate_fine_mode_aerosol_mass_mixing_ratio | aermr16 | 210247 | Fast access | X | X | |
| Nitrate radical | kg kg-1 | nitrate_radical | no3 | 217032 | X | X | ||
| Nitric acid | kg kg-1 | nitric_acid | hno3 | 217006 | Fast access | X | X | |
| Nitrogen dioxide | kg kg-1 | nitrogen_dioxide | no2 | 210121 | Fast access | X | X | |
| Nitrogen monoxide | kg kg-1 | nitrogen_monoxide | no | 217027 | Fast access | X | X | |
| Olefins | kg kg-1 | olefins | ole | 217011 | X | X | ||
| Organic ethers | kg kg-1 | organic_ethers | ror | 217036 | X | X | ||
| Organic nitrates | kg kg-1 | organic_nitrates | onit | 217015 | X | X | ||
| Ozone | kg kg-1 | ozone | go3 | 210203 | Fast access | X | X | |
| Paraffins | kg kg-1 | paraffins | par | 217009 | X | X | ||
| Pernitric acid | kg kg-1 | pernitric_acid | ho2no2 | 217034 | X | X | ||
| Peroxides | kg kg-1 | peroxides | rooh | 217014 | X | X | ||
| Peroxy acetyl radical | kg kg-1 | peroxy_acetyl_radical | c2o3 | 217035 | X | X | ||
| Peroxyacetyl nitrate | kg kg-1 | peroxyacetyl_nitrate | pan | 217013 | Fast access | X | X | |
| Potential vorticity | K m2 kg-1 s-1 | potential_vorticity | pv | 60 | X | X | ||
| Propane | kg kg-1 | propane | c3h8 | 217047 | Fast access | X | X | |
| Propene | kg kg-1 | propene | c3h6 | 217048 | X | X | ||
| Radon | kg kg-1 | radon | ra | 210181 | X | X | ||
| Relative humidity | % | relative_humidity | r | 157 | X | X | ||
| Sea Salt Aerosol (0.03 - 0.5 um) Mixing Ratio | kg kg-1 | sea_salt_aerosol_0.03-0.5um_mixing_ratio | aermr01 | 210001 | Fast access | X | X | |
| Sea Salt Aerosol (0.5 - 5 um) Mixing Ratio | kg kg-1 | sea_salt_aerosol_0.5-5um_mixing_ratio | aermr02 | 210002 | Fast access | X | X | |
| Sea Salt Aerosol (5 - 20 um) Mixing Ratio | kg kg-1 | sea_salt_aerosol_5-20um_mixing_ratio | aermr03 | 210003 | Fast access | X | X | |
| Specific cloud ice water content | kg kg-1 | specific_cloud_ice_water_content | ciwc | 247 | X | X | ||
| Specific cloud liquid water content | kg kg-1 | specific_cloud_liquid_water_content | clwc | 246 | X | X | ||
| Specific humidity | kg kg-1 | specific_humidity | q | 133 | Fast access | X | X | |
| Specific rain water content | kg kg-1 | specific_rain_water_content | crwc | 75 | X | X | ||
| Specific snow water content | kg kg-1 | specific_snow_water_content | cswc | 76 | X | X | ||
| Stratospheric ozone | kg kg-1 | stratospheric_ozone_tracer | o3s | 217024 | X | X | ||
| Sulphate Aerosol Mixing Ratio | kg kg-1 | sulphate_aerosol_mixing_ratio | aermr11 | 210011 | Fast access | X | X | |
| Sulphur dioxide | kg kg-1 | sulphur_dioxide | so2 | 210122 | Fast access | X | X | |
| Temperature | K | temperature | t | 130 | Fast access | X | X | |
| Terpenes | kg kg-1 | terpenes | c10h16 | 217049 | X | X | ||
| U component of wind | m s-1 | u_component_of_wind | u | 131 | Fast access | X | X | |
| V component of wind | m s-1 | v_component_of_wind | v | 132 | Fast access | X | X | |
| Vertical velocity | Pa s-1 | vertical_velocity | 135 | X | X |
Satellite observations
Satellite observations are used by CAMS to constrain the global forecast model, ensuring the forecasts are as accurate as possible. The process of merging the numerical forecast model with the observations is called data assimilation.
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