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Namespace Prefixes

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n9	http://vocab.nerc.ac.uk/collection/P02/current/VSRA/
dcterms	http://purl.org/dc/terms/
n13	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0270/1/
n15	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0270/2/
n11	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0270/3/
dc	http://purl.org/dc/elements/1.1/
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void	http://rdfs.org/ns/void#
n8	http://vocab.nerc.ac.uk/collection/P04/current/G210/
n19	http://vocab.nerc.ac.uk/collection/P64/current/G210/
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owl	http://www.w3.org/2002/07/owl#
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n7	http://purl.org/pav/
n2	http://vocab.nerc.ac.uk/standard_name/surface_downwelling_photosynthetic_radiative_flux_in_air/
n14	http://mmisw.org/ont/cf/parameter/
n16	http://vocab.nerc.ac.uk/collection/P06/current/UFAA/
n6	http://vocab.nerc.ac.uk/collection/P64/current/G436/

Statements

Subject Item

n2:

rdf:type

skos:Concept

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owl:sameAs

n2: n14:surface_downwelling_photosynthetic_radiative_flux_in_air

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surface_downwelling_photosynthetic_radiative_flux_in_air

dcterms:identifier

SDN:P07::CFSN0270

dc:identifier

SDN:P07::CFSN0270

dcterms:date

2018-07-03 16:09:23.0

skos:definition

The surface called "surface" means the lower boundary of the atmosphere. 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. "Photosynthetic" radiation is the part of the spectrum which is used in photosynthesis e.g. 400-700 nm. The range of wavelengths could be specified precisely by the bounds of a coordinate of radiation_wavelength. 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.

skos:notation

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false

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