Concept
mass_fraction_of_pm2p5_particulate_organic_matter_dry_aerosol_particles_expressed_as_carbon_in_air
| URI | http://vocab.nerc.ac.uk/collection/P07/current/QDRZ34AJ/2/ | |
|---|---|---|
| Within Vocab | Climate and Forecast Standard Names | |
| Alternative Labels | ||
| Definition | Mass fraction is used in the construction "mass_fraction_of_X_in_Y", where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. "Dry aerosol particles" means aerosol particles without any water uptake. "Pm2p5 aerosol" is an air pollutant with an aerodynamic diameter of less than or equal to 2.5 micrometers. The term "particulate_organic_matter_dry_aerosol" means all particulate organic matter dry aerosol except elemental carbon. It is the sum of primary_particulate_organic_matter_dry_aerosol and secondary_particulate_organic_matter_dry_aerosol. | |
| Date | None | |
| Identifier | QDRZ34AJ | |
| Note | accepted | |
| Is Version Of | QDRZ34AJ | |
| version | 2 | |
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