surface_diffuse_downwelling_shortwave_flux_in_air
complete
Created: June 21, 2018
Proposer: Alison Pamment / Robert Pincus
Proposed Date: 2018-06-21
CMIP6 - RFMIP. Correct the definition of 'diffuse radiation'.
Change Date: June 21, 2018, 2:40 p.m.
Term: surface_diffuse_downwelling_shortwave_flux_in_air
Unit: W m-2
Downwelling radiation is radiation from above. It does not mean "net downward". "Diffuse" radiation is radiation that has been scattered by particles in the atmosphere such as cloud droplets and aerosols. 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. The surface called "surface" means the lower boundary of the atmosphere. "shortwave" means shortwave radiation.
Change Date: June 21, 2018, 2:43 p.m.
Term: surface_diffuse_downwelling_shortwave_flux_in_air
Unit: W m-2
Unit ref: UFAA
AMIP:
GRIB:
The surface called "surface" means the lower boundary of the atmosphere. The term "shortwave" means shortwave radiation. Downwelling radiation is radiation from above. It does not mean "net downward". "Diffuse" radiation is radiation that has been scattered by gas molecules in the atmosphere and by particles such as cloud droplets and aerosols. 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.
Change Date: July 2, 2018, 3:23 p.m.
Term: surface_diffuse_downwelling_shortwave_flux_in_air
Unit: W m-2
Unit ref: UFAA
AMIP:
GRIB:
The surface called "surface" means the lower boundary of the atmosphere. The term "shortwave" means shortwave radiation. 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. "Diffuse" radiation is radiation that has been scattered by gas molecules in the atmosphere and by particles such as cloud droplets and aerosols. 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.