Concept
Surface direct downwelling shortwave flux in air
| URI | http://vocab.nerc.ac.uk/standard_name/surface_direct_downwelling_shortwave_flux_in_air/ | ||
|---|---|---|---|
| Within Vocab | Climate and Forecast Standard Names | ||
| Definition | The surface called "surface" means the lower boundary of the atmosphere. "Direct" (also known as "beam") radiation is radiation that has followed a direct path from the sun and is alternatively known as "direct insolation". 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. The term "shortwave" means shortwave radiation. 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 | ||
| Note | accepted | ||
| modified | 2018-07-03 16:09:23.0 | ||
| Exact Match | http://mmisw.org/ont/cf/parameter/surface_direct_downwelling_shortwave_flux_in_air | ||
| http://vocab.nerc.ac.uk/standard_name/surface_direct_downwelling_shortwave_flux_in_air/ | |||
P07:D6W2P30Q |
surface_direct_downwelling_shortwave_flux_in_air | ||
| Related | P06:UFAA |
Watts per square metre | |
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