atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol_particles

under discussion
Created: Nov. 19, 2014
Proposer: Alison Pamment
Proposed Date: 2014-11-11
Change Date: Nov. 19, 2014, 5 p.m.
Term: atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol
Unit: 1
Unit ref:
AMIP:
GRIB:
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. 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. 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. Black carbon aerosol is composed of elemental carbon. It is strongly light absorbing.
Change Date: Nov. 19, 2014, 5:01 p.m.
Term: atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol_particles
Unit: 1
Unit ref: vocab.ndg.nerc.ac.uk/term/P061/current/UUUU
AMIP:
GRIB:
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. 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. 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. Black carbon aerosol is composed of elemental carbon. It is strongly light absorbing.
Change Date: Nov. 19, 2014, 5:05 p.m.
Term: atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol_particles
Unit: 1
Unit ref: vocab.ndg.nerc.ac.uk/term/P061/current/UUUU
AMIP:
GRIB:
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. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Ambient_aerosol" means that the aerosol is measured or modelled at the ambient state of pressure, temperature and relative humidity that exists in its immediate environment. "Ambient aerosol particles" are aerosol particles that have taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the particles. To specify the relative humidity and temperature at which the quantity described by the standard name applies, provide scalar coordinate variables with standard names of "relative_humidity" and "air_temperature". Black carbon aerosol is composed of elemental carbon. It is strongly light absorbing. 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.