Concept
surface_diffuse_downwelling_photosynthetic_radiative_flux_in_air
| URI | http://vocab.nerc.ac.uk/collection/P07/current/CFSN0295/1/ | |
|---|---|---|
| Within Vocab | Climate and Forecast Standard Names | |
| Alternative Labels | ||
| Definition | The surface called 'surface' means the lower boundary of the atmosphere. Downwelling radiation is radiation from above. It does not mean 'net downward'. Radiative flux is the sum of shortwave and longwave radiative fluxes. 'Photosynthetic' radiation is the part of the spectrum which is used in photosynthesis e.g. 300-700 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. | |
| Date | None | |
| Identifier | CFSN0295 | |
| Note | accepted | |
| Is Version Of | CFSN0295 | |
| version | 1 | |
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