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Namespace Prefixes

PrefixIRI
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n7http://vocab.nerc.ac.uk/standard_name/volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water/
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n9http://vocab.nerc.ac.uk/collection/P04/current/G940/

Statements

Subject Item
n2:
rdf:type
skos:Concept
owl:versionInfo
2
owl:sameAs
n7: n12:volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water
skos:broader
n9: n13: n17:
skos:prefLabel
volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water
dcterms:identifier
SDN:P07::CFSN0064
dc:identifier
SDN:P07::CFSN0064
dcterms:date
2018-07-03 16:09:23.0
skos:definition
Downwelling radiation is radiation from above. It does not mean "net downward". The sign convention is that "upwelling" is positive upwards and "downwelling" is positive downwards. Radiative flux is the sum of shortwave and longwave radiative fluxes. When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with specific_ instead of volume_. The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths, unless a coordinate of radiation_wavelength is included to specify the wavelength. Attenuation is the sum of absorption and scattering. Attenuation is sometimes called "extinction". Also called "diffuse" attenuation, the attenuation of downwelling radiative flux refers to the decrease with decreasing height or increasing depth of the downwelling component of radiative flux, regardless of incident direction.
skos:notation
SDN:P07::CFSN0064
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owl:deprecated
false
skos:note
accepted
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n10:
n4:authoredOn
2018-07-03 16:09:23.0
n4:hasCurrentVersion
n5:
n4:hasVersion
n16:
n4:version
2