Concept
surface_downwelling_photosynthetic_radiative_flux_in_sea_water
| URI | http://vocab.nerc.ac.uk/collection/P07/current/CFSN0271/ |
|---|---|
| Within Vocab | Climate and Forecast Standard Names |
| Preferred Label | surface_downwelling_photosynthetic_radiative_flux_in_sea_water |
| 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. |
| Same As |
http://mmisw.org/ont/cf/parameter/surface_downwelling_photosynthetic_radiative_flux_in_sea_water standard_name: Surface downwelling photosynthetic radiative flux in sea water |
| Broader |
P02:
Visible waveband radiance and irradiance measurements in the water column P04: EARTH SCIENCE > Oceans > Ocean Optics > Irradiance P04: EARTH SCIENCE > Oceans > Ocean Optics > Photosynthetically Active Radiation P64: EARTH SCIENCE > Oceans > Ocean Optics > Irradiance P64: EARTH SCIENCE > Oceans > Ocean Optics > Photosynthetically Active Radiation |
| Related |
P06:
Watts per square metre |
| Note | accepted |
| Deprecated | false |
| Alternative Label | |
| Version | 3 |
| Has Current Version | http://vocab.nerc.ac.uk/collection/P07/current/CFSN0271/3/ |
| Authored On | 2018-07-03 16:09:23 |
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