1.3 CMOR Variable: Cloud Optical Depth (cod)

Record Label : cod

Record Title : Cloud Optical Depth

Record Identifier : 19bdb4c2-81b1-11e6-92de-ac72891c3257

Link to a record specifying the structure of the variable : str-013

MIP Variable : cod

Deflate: NetCDF compression parameter :

Deflate Level: NetCDF compression parameter :

Shuffle: NetCDF compression parameter :

Indicative priority for this parameter, which is over-ruled by the requestVar priority setting, but provides a reference for organisation of the CMORvariables : 1

Data value type, e.g. float or double : real

Modeling Realm : aerosol

CMOR Directive Positive :

Section of a table : AERday

Link to MIP table record : AERday

The MIP table : AERday

Provenance : AERday ((isd.003))

Provenance Note : AERday

Frequency of Time Steps to be Archived : day

Row index of entry in source sheet : -1

Description : The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Cloud" means the component of extinction owing to the presence of liquid or ice water particles. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

Request variable (carrying priority and link to group) : cod ((isd.005))