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Namespace Prefixes

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n13	http://vocab.nerc.ac.uk/collection/P02/current/VSRA/
dcterms	http://purl.org/dc/terms/
n2	http://vocab.nerc.ac.uk/standard_name/surface_downwelling_photosynthetic_photon_flux_in_air/
n14	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0284/1/
dc	http://purl.org/dc/elements/1.1/
skos	http://www.w3.org/2004/02/skos/core#
n18	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0284/2/
n17	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0284/3/
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n19	http://vocab.nerc.ac.uk/collection/P04/current/G210/
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n16	http://vocab.nerc.ac.uk/collection/P06/current/M2MS/
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n6	http://vocab.nerc.ac.uk/.well-known/
n9	http://vocab.nerc.ac.uk/collection/P04/current/G436/
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n4	http://purl.org/pav/
n8	http://mmisw.org/ont/cf/parameter/
n15	http://vocab.nerc.ac.uk/collection/P64/current/G436/

Statements

Subject Item

n2:

rdf:type

skos:Concept

owl:versionInfo

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owl:sameAs

n8:surface_downwelling_photosynthetic_photon_flux_in_air n2:

skos:broader

n9: n12: n13: n15: n19:

skos:prefLabel

surface_downwelling_photosynthetic_photon_flux_in_air

dcterms:identifier

SDN:P07::CFSN0284

dc:identifier

SDN:P07::CFSN0284

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. A photon flux is specified in terms of numbers of photons expressed in moles. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.

skos:notation

SDN:P07::CFSN0284

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false

skos:note

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n4:authoredOn

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n4:version

3