Change Date: March 21, 2016, 5:10 p.m.

Term: surface_spectral_hemispherical_reflectance_of_diffuse_shortwave_radiation

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

Surface spectrally-resolved diffuse albedo in the interests of specifying the surface boundary condition for the line-by-line radiative transfer benchmark calculations. (albdif)

Change Date: May 31, 2018, 4:40 p.m.

Term: surface_diffuse_downwelling_shortwave_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

Change Date: May 31, 2018, 4:41 p.m.

Term: surface_diffuse_downwelling_shortwave_spherical_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

Change Date: May 31, 2018, 4:48 p.m.

Term: surface_diffuse_downwelling_shortwave_spherical_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

The surface called "surface" means the lower boundary of the atmosphere. "Diffuse" radiation is radiation that has been scattered by particles in the atmosphere such as cloud droplets and aerosols. Downwelling radiation is radiation from above. It does not mean "net downward". The term "shortwave" means shortwave radiation.

Change Date: May 31, 2018, 4:49 p.m.

Term: surface_diffuse_downwelling_shortwave_spherical_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

The surface called "surface" means the lower boundary of the atmosphere. "Diffuse" radiation is radiation that has been scattered by particles in the atmosphere such as cloud droplets and aerosols. 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, 8:42 a.m.

Term: surface_diffuse_shortwave_spherical_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

The surface called "surface" means the lower boundary of the atmosphere. "Diffuse" radiation is radiation that has been scattered by particles in the atmosphere such as cloud droplets and aerosols. 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, 9:16 a.m.

Term: surface_diffuse_shortwave_hemispherical_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

The surface called "surface" means the lower boundary of the atmosphere. "Diffuse" radiation is radiation that has been scattered by particles in the atmosphere such as cloud droplets and aerosols. 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, 10:39 a.m.

Term: surface_diffuse_shortwave_hemispherical_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

The surface called "surface" means the lower boundary of the atmosphere. "Diffuse" radiation is radiation that has been scattered by particles in the atmosphere such as cloud droplets and aerosols. 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_diffuse_downwelling_shortwave_flux_in_air which is reflected. If the diffuse radiation is isotropic, this term is equivalent to the integral of surface_bidirectional_reflectance over all incident angles and 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 radiative flux.

Change Date: June 21, 2018, 2:23 p.m.

Term: surface_diffuse_shortwave_hemispherical_reflectance

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

The surface called "surface" means the lower boundary of the atmosphere. "Diffuse" radiation is radiation that has been scattered by gas molecules in the atmosphere and by particles such as cloud droplets and aerosols. 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_diffuse_downwelling_shortwave_flux_in_air which is reflected. If the diffuse radiation is isotropic, this term is equivalent to the integral of surface_bidirectional_reflectance over all incident angles and 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 radiative flux.