Radiometric

Radiometric - Longwave Broadband

Diffuse and direct radiant energy.

Specific Measurements:


Longwave broadband downwelling irradiance: The total diffuse and direct radiant energy, at wavelengths longer than approximately 4 µm, that is being emitted downwards.


Longwave broadband net irradiance: The difference between upwelling and downwelling broadband longwave radiation.

 

Longwave broadband upwelling irradiance: The rate at which radiant energy, at a wavelength longer than approximately 4 µm, is being emitted upwards into a radiation field and transferred across a surface area (real or imaginary) in a hemisphere of directions.

 

Radiative heating rate: The heating rate due to the divergence of long and shortwave radiative flux.


Net broadband total irradiance: The difference between upwelling and downwelling, covering longwave and shortwave radiation.

 

Radiometric terms for the IASOA data vocabulary are taken from the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) program’s measurement vocabulary. For the full reference, please visit: http://www.arm.gov/measurements.

Radiometric - Shortwave Broadband

All of the solar radiation, across the wavelength range of 0.4 and 4 µm.

Specific Measurements:



Radiative heating rate: The heating rate due to the divergence of long and shortwave radiative flux.

Net broadband total irradiance: The difference between upwelling and downwelling, covering longwave and shortwave radiation.

Shortwave broadband diffuse downwelling irradiance: All of the solar radiation, across the wavelength range of 0.4 and 4 µm, coming directly from the sky except for solar radiation coming directly from the sun and the circumsolar irradiance within approximately three degrees of the sun.

Shortwave broadband direct downwelling irradiance: Radiant energy, across the wavelength range of 0.4 and 4 µm, that is transferred directly from the sun to the receiver.

Shortwave broadband direct normal irradiance: The rate at which radiant energy in broad bands of wavelengths shorter than approximately 4µm, that comes directly from the Sun without being scattered or absorbed in the atmosphere, passes through a unit area perpendicular to the direction from the Sun.

Shortwave broadband radiance: A measure of the intrinsic radiant energy flux intensity, at wavelengths between 0.4 and 4 µ, emitted by a radiator in a given direction, expressed in units of energy per unit time per unit solid angle.

Shortwave broadband total downwelling irradiance: The total diffuse and direct radiant energy that comes from some continuous range of directions, at wavelengths between 0.4 and 4 {mu}m, that is being emitted downwards.

Shortwave broadband total net irradiance: The difference between upwelling and downwelling broadband shortwave radiation.

Shortwave broadband total upwelling irradiance: The rate at which radiant energy, at a wavelength between 0.4 and 4 {mu}m, is being emitted upwards into a radiation field and transferred across a surface area (real or imaginary) in a hemisphere of directions.

 

Radiometric terms for the IASOA data vocabulary are taken from the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) program’s measurement vocabulary. For the full reference, please visit: http://www.arm.gov/measurements.