# atmosphere optical thickness due to ambient aerosol

URI: http://linked.data.gov.au/def/tern-cv/d565dd811bf664a96bbd69d5edbad437fe190f18cb0acd227181846136f1e5bb

Also known as atmosphere_optical_thickness_due_to_ambient_aerosol

Date created: 2015-01-07
Date modified: 2022-06-10

Parameter Type

##### Definition

The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

##### source

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

##### notation

atmosphere_optical_thickness_due_to_ambient_aerosol

##### 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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