Cloud Properties - Macrophysical

Measurements of various macrophysical cloud properties.

Specific Measurements:

Cloud base height: For a given cloud or cloud layer, the lowest level of the atmosphere where cloud properties are detectable.

Cloud fraction: Fraction of sky covered by clouds, observed directly or derived from SW irradiance.

Cloud top height: For a given cloud or cloud layer, the highest level of the atmosphere where cloud properties are detectable.

Cloud type: Cloud type such as cirrus, stratus, cumulus, etc.

Radar Doppler: The power spectrum and moments of the radar signal expressed as a function of Doppler frequency or Doppler velocity. It may be thought of as the reflectivity weighted radial velocity distribution of the scatterers in a distributed target.

Radar polarization: The temporal and geometric behavior of the electric field vector of an electromagnetic wave transmitted or received by a radar system, e.g.elliptical polarization, differential reflectivity, phase shift, co-polar correlation coefficient, linear depolarization ratio.

Radar reflectivity: A measure of the efficiency of a radar target in intercepting and returning radio energy. It depends upon the size, shape, aspect, and dielectric properties of that target.

 

Cloud Properties 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.