| BrO (column/profile) | BrO = Bromine monoxide. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 5 instruments |  |
| C2H2 (column/profile) | C2H2 = Acetylene. Requested in the troposphere (layers: LT, HT) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 1 instrument | |
| C2H6 (column/profile) | C2H6 = Ethane. Requested in the troposphere (layers: LT, HT) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 1 instrument | |
| CFC-11 (column/profile) | CFC-11 = Trichlorofluoromethane = Freon-11. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 2 instruments | |
| CFC-12 (column/profile) | CFC-12 = Dichlorodifluoromethane = Freon-12. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 2 instruments | |
| CH3Br (column/profile) | CH3BR = Methyl Bromide. Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 1 instrument | |
| CH4 Mole Fraction | 3D field of amount of CH4 (Methane, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) - Resolution Units km, Measuring Units molecules.cm-2, Uncertainty Units % | 40 instruments | |
| CH4 Total Column | 2D field of total amount of CH4 molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere - Measuring Units molecules.cm-2, Uncertainty Units % | 1 instrument | |
| CH4 Tropospheric Column | 2D field of total amount of CH4 molecules per unit area in an atmospheric column extending from the Earth’s surface to the tropopause - Measuring Units molecules.cm-2, Uncertainty Units % | 0 instruments | |
| CHOCHO (column/profile) | 2D field of total amount of CHOHO molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere. Physical unit: [ ppm ], Accuracy unit: [%] | 2 instruments | |
| ClO (column/profile) | ClO = Chlorine monoxide = Hypochlorite. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 4 instruments | |
| ClONO2 (column/profile) | ClONO2 = Chlorine nitrate. Requested from mid-troposphere to TOA (layers: HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 2 instruments | |
| CO Mole Fraction | 3D field of amount of CO (Carbon monoxide, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) - Resolution Units km | 10 instruments | |
| CO Total Column | 2D field of total amount of CO molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere - Measuring Units molecules.cm-2, Uncertainty Units % | 2 instruments | |
| CO Tropospheric Column | 2D field of total amount of CO molecules per unit area in an atmospheric column extending from the Earth’s surface to the tropopause. CO = Carbon monoxide. Requested from surface to low stratosphere (layers: LT, HT, LS) + Total column - Measuring Units molecules.cm-2, Uncertainty Units %, Physical unit [ ppm ], Accuracy unit [ % ] | 0 instruments | |
| CO2 Mole Fraction | 3D field of amount of CO2 (Carbon dioxide, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) - Resolution Units km, Measuring Units molecules.cm-2, Uncertainty Units % | 38 instruments | |
| CO2 Total Column | 2D field of total amount of CO2 molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere - Measuring Units molecules.cm-2, Uncertainty Units % | 2 instruments | |
| CO2 Tropospheric Column | 2D field of total amount of CO2 molecules per unit area in an atmospheric column extending from the Earth’s surface to the tropopause - Measuring Units molecules.cm-2, Uncertainty Units % | 0 instruments | |
| COS (column/profile) | COS = Carbonyl sulfide. Requested from surface to low stratosphere (layers: LT, HT, LS) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 0 instruments | |
| HCFC-22 (column/profile) | HCFC-22 = Chlorodifluoromethane or difluoromonochloromethane . Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 1 instrument | |
| HCHO Mole Fraction | 3D field of amount of HCHO (Formaldehyde, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles). | 4 instruments | |
| HCHO Total Column | 2D field of total amount of HCHO molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere - Measuring Units molecules.cm-2, Uncertainty Units % | 5 instruments | |
| HCHO Tropospheric Column | 2D field of total amount of HCHO molecules per unit area in an atmospheric column extending from the Earth’s surface to the tropopause - Measuring Units molecules.cm-2, Uncertainty Units % | 0 instruments | |
| HCl (column/profile) | HCl = Hydrogen chloride. Requested from mid-troposphere to TOA (layers: HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 2 instruments | |
| HDO (column/profile) | HDO = Water vapour (with one hydrogen nucleus replaced by its deuterium isotope). Requested from low stratosphere to TOA (layers: LS and HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 3 instruments | |
| HNO3 (column/profile) | HNO3 = Nitric acid. Requested from surface to TOA (layers: LT, HT, LS, HS&M) + Total column - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 9 instruments | |
| HNO3 Mole Fraction | 3D field of amount of HNO3 (Nitric acid, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) | 1 instrument | |
| N2O (column/profile) | N2O = Nitrous oxide. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 10 instruments | |
| N2O5 (column/profile) | N2O5 = Nitrogen pentoxide. Requested in the troposphere (layers: LT, HT) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 2 instruments | |
| NH3 Total Column | 2D field of total amount of NH3 molecules (Ammonia) per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere. | 1 instrument | |
| NO (column/profile) | NO = Nitric oxide. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 4 instruments | |
| NO2 Mole Fraction | 3D field of amount of NO2 (Nitrogen peroxide, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) - Resolution Units km CO2 = Carbon dioxide. Requested from surface to TOA (layers: LT, HT, LS, HS&M) + Total column - Measuring Units molecules.cm-2, Uncertainty Units %, Physical unit [ ppm ], Accuracy unit: [ % ] | 19 instruments | |
| NO2 Total Column | 2D field of total amount of NO2 molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere - Measuring Units molecules.cm-2, Uncertainty Units % | 5 instruments | |
| NO2 Tropospheric Column | 2D field of total amount of NO2 molecules per unit area in an atmospheric column extending from the Earth’s surface to the tropopause - Measuring Units molecules.cm-2, Uncertainty Units % | 2 instruments | |
| OClO (column/profile) | OClO = chlorate. Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 1 instrument | |
| OH (column/profile) | OH = Hydroxil radical. Requested from surface to TOA (layers: LT, HT, LS, HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 1 instrument | |
| PAN (column/profile) | PAN = Peroxy Acetyl Nitrate. Requested in the troposphere (layers: LT, HT) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 0 instruments | |
| pCO2 | Partial pressure of carbon dioxide at the surface of the sea - Measuring and Uncertainty Units microatm | 0 instruments | |
| PSC (column/profile) | PSC = Polar Stratospheric Clouds. Requested in the lower stratosphere (layer: LS) - Accuracy expressed as Hit Rate [ HR ] and False Alarm Rate [ FAR ]. | 0 instruments | |
| SF6 (column/profile) | SF6 = Sulfur exafluoride. Requested from low stratosphere to TOA (layers: LS and HS&M) - Physical unit: [ ppm ] - Accuracy unit: [ % ]. | 1 instrument | |
| SO2 Mole Fraction | 3D field of amount of SO2 (Sulfur dioxide, expressed in moles) divided by the total amount of all constituents in dry air (also expressed in moles) - Measuring Units molecules.cm-2, Uncertainty Units % | 10 instruments | |
| SO2 Total Column | 2D field of total amount of SO2 molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere - Measuring Units molecules.cm-2, Uncertainty Units % | 7 instruments | |
| SO2 Tropospheric Column | 2D field of total amount of SO2 molecules per unit area in an atmospheric column extending from the Earth’s surface to the tropopause - Measuring Units molecules.cm-2, Uncertainty Units % | 0 instruments | |