# mass fraction of pm2p5 aerosol in air

URI: http://linked.data.gov.au/def/tern-cv/15619d2f2b56c095f40bfd9731aa72d273203efb7ae354a13fdef3475cdef14d

Also known as mass_fraction_of_pm2p5_aerosol_in_air

Date created: 2009-07-06
Date modified: 2022-06-10

Parameter Type

##### 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). "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Pm2p5 aerosol" is an air pollutant with an aerodynamic diameter of less than or equal to 2.5 micrometers. Aerosol takes up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the aerosol. To specify the relative humidity and temperature at which the particle size applies, provide scalar coordinate variables with the standard names of, respectively, "relative_humidity" and "air_temperature".

##### source

http://vocab.nerc.ac.uk/collection/P07/current/

##### notation

mass_fraction_of_pm2p5_aerosol_in_air

##### note

This concept was harvested from the controlled vocabulary at http://vocab.nerc.ac.uk/collection/P07/current/ on 2022-06-10. Information was pulled as-is for the following properties: dcterms:created, skos:definition, skos:exactMatch, skos:related and skos:notation. The URI of the concept is generated using SHA256 on the CF standard name (in the skos:notation) and concatenated with the TERN controlled vocabularies' base URI (http://linked.data.gov.au/def/tern-cv/).

##### related

http://vocab.nerc.ac.uk/collection/P06/current/UUUU/

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