URGENT Air Data General Inventory

Inventory of air data recorded in the framework of the URGENT Thematic Programme, sorted by data category.


(*) The atmospheric content in chemicals is given in concentration (number density), volume mixing ratio, density or mass mixing ratio. – For water, other expressions are used as well (see below). – For neutral molecules, the most commonly used quantity is the volume mixing ratio, although some species contents are expressed via other variables (for example, the carbon content is determined by its density). The content in ions is given as a density.
In addition to the ways listed above, the water vapour amount can also be expressed as relative humidity (RH). Note that the water vapour mass mixing ratio refers to a unit mass of dry air. The mass of water vapour per unit mass of moist air is called specific humidity.
Some experiments involved the release and monitoring of tracers. In such cases, the release rate of the species is also given.

Dynamical, radiative and meteorological data
Potential temperature
Short wave radiation
Reynolds' stress
Shear stress
Dew-point temperature
Photodissociation rates
Chemical compounds
Inorganic molecules and neutral radicals
Ozone O3
Hydroxyl OH
Hydroperoxyl HO2
Water vapour H2O
Nitric oxide NO
Nitrogen dioxide NO2
Total nitrogen oxides NOX
Ammonia NH3
Nitrous acid HNO2
Nitric acid HNO3
Sulphur dioxide SO2
Carbon C
Carbon monoxide CO
Organic molecules
Ethane C2H6
Propane C3H8
2-methylpropane (Isobutane) CH3-CH(CH3)-CH3
Butane C4H10
2-methylbutane (Isopentane) CH3-CH(CH3)-CH2-CH3
Pentane C5H12
2-methylpentane CH3-CH(CH3)-CH2-CH2-CH3
3-methylpentane CH3-CH2-CH(CH3)-CH2-CH3
Hexane C6H14
Heptane C7H16
One double bond
Ethene (Ethylene) C2H4
Propene CH2=CH–CH3
2-methylpropene (Isobutene) CH2=C(CH3)–CH3
1-butene CH2=CH–CH2–CH3
Trans-2-butene CH3–HC=CH–CH3
Cis-2-butene CH3–CH=CH–CH3
Trans-2-pentene CH3–HC=CH–CH2–CH3
Cis-2-pentene CH3–CH=CH–CH2–CH3
Two double bonds
1,3-butadiene CH2=CH–CH=CH2
2-methyl-1,3-butadiene (Isoprene) CH2=C(CH3)–CH=CH2
Ethyne (Acetylene) C2H2
Aromatic hydrocarbons
Benzene C6H6
Methylbenzene (Toluene) CH3C6H5
Naphtalene C10H8
Other organic compounds
Formaldehyde CH2O
Peroxyacetylnitrate (PAN) CH3C(O)OONO2
Perfluoromethylcyclopentane (PMCP) C6F12
Perfluoromethylcyclohexane (PMCH) C7F14
Ammonium NH4+
Chloride Cl
Nitrate NO3
Sulphate SO4=
Particulate Matter
PM2.5 density
PM10 density
Total PM density
Particle number density
Particle surface area