surface_direct_shortwave_hemispherical_reflectance
complete
Created: March 22, 2016
Proposer: Daniel Feldman / Robert Pincus
Proposed Date: 2015-07-17
CMIP6 - RFMIP. 7. CMIP6 short name albdir.
Change Date: March 22, 2016, 10:32 a.m.
Term: surface_spectral_hemispherical_reflectance_of_direct_shortwave_radiation
Unit: 1
Unit ref: UUUU
AMIP:
GRIB:
Surface spectrally-resolved direct albedo, in the interests of specifying the surface boundary condition for the line-by-line radiative transfer benchmark calculations. (In our original request, this variable was specified by the Short name "albdir".)
Change Date: May 31, 2018, 4:58 p.m.
Term: surface_direct_downwelling_shortwave_spherical_reflectance
Unit: 1
Unit ref: UUUU
AMIP:
GRIB:
Change Date: May 31, 2018, 4:59 p.m.
Term: surface_direct_downwelling_shortwave_spherical_reflectance
Unit: 1
Unit ref: UUUU
AMIP:
GRIB:
The surface called "surface" means the lower boundary of the atmosphere. Downwelling radiation is radiation from above. It does not mean "net downward". The term "shortwave" means shortwave radiation. Spherical reflectance is the reflectance of radiation incident on unit area of a hemispherical (or "2-pi") collector. Reflectance is the ratio of the energy of the reflected to the incident radiation. A coordinate variable of radiation_wavelength or radiation_frequency can be used to specify the wavelength or frequency, respectively, of the radiation.
Change Date: May 31, 2018, 5:03 p.m.
Term: surface_direct_downwelling_shortwave_spherical_reflectance
Unit: 1
Unit ref: UUUU
AMIP:
GRIB:
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 term "shortwave" means shortwave radiation. Spherical reflectance is the reflectance of radiation incident on unit area of a hemispherical (or "2-pi") collector. Reflectance is the ratio of the energy of the reflected to the incident radiation. A coordinate variable of radiation_wavelength or radiation_frequency can be used to specify the wavelength or frequency, respectively, of the radiation.
Change Date: June 20, 2018, 11:01 a.m.
Term: surface_direct_shortwave_hemispherical_reflectance
Unit: 1
Unit ref: UUUU
AMIP:
GRIB:
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 term "shortwave" means shortwave radiation. Spherical reflectance is the reflectance of radiation incident on unit area of a hemispherical (or "2-pi") collector. Reflectance is the ratio of the energy of the reflected to the incident radiation. A coordinate variable of radiation_wavelength or radiation_frequency can be used to specify the wavelength or frequency, respectively, of the radiation.
Change Date: June 20, 2018, 11:05 a.m.
Term: surface_direct_shortwave_hemispherical_reflectance
Unit: 1
Unit ref: UUUU
AMIP:
GRIB:
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". The term "shortwave" means shortwave radiation. Hemispherical reflectance is the ratio of the energy of the reflected to the incident radiation. This term gives the fraction of the surface_direct_downwelling_shortwave_flux_in_air which is reflected. It is equivalent to the surface_bidirectional_reflectance at the incident angle of the incoming solar radiation and integrated over all outgoing angles in the hemisphere above the surface. A coordinate variable of radiation_wavelength or radiation_frequency can be used to specify the wavelength or frequency, respectively, of the radiation. Shortwave hemispherical reflectance is related to albedo, but albedo is defined in terms of the fraction of the full spectrum of incident solar radiation which is reflected. It is related to the hemispherical reflectance averaged over all wavelengths using a weighting proportional to the incident radiation flux.