Concept
stratosphere_optical_thickness_due_to_volcanic_ambient_aerosol_particles
| URI | http://vocab.nerc.ac.uk/collection/P07/current/3YBJPWG7/1/ | ||
|---|---|---|---|
| Within Vocab | Climate and Forecast Standard Names | ||
| Alternative Labels | |||
| 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 stratosphere optical thickness applies to radiation passing through the atmosphere layer between the tropopause and stratopause. 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. "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". Volcanic aerosols include both volcanic ash and secondary products such as sulphate aerosols formed from gaseous emissions of volcanic eruptions. | ||
| Date | 2018-05-15T09:59:16 | ||
| Identifier | SDN:P07::3YBJPWG7 | ||
| Note | accepted | ||
| Is Version Of | 3YBJPWG7 | ||
| version | 1 | ||
| Same As | MMI | http://mmisw.org/ont/cf/parameter/stratosphere_optical_thickness_due_to_volcanic_ambient_aerosol_particles | |
| CF | http://vocab.nerc.ac.uk/standard_name/stratosphere_optical_thickness_due_to_volcanic_ambient_aerosol_particles/ | ||
| Related | P06:UUUU |
Dimensionless | |
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