mass_fraction_of_cloud_liquid_water_in_air
completeCreated: Feb. 3, 2020
Proposer: Alison Pamment
Proposed Date: 2020-02-03
Change Date: Feb. 3, 2020, 2:13 p.m.
Term: mass_fraction_of_cloud_liquid_water_in_air
Unit: 1
Unit ref: UUUU
AMIP: clw
GRIB:
Mass fraction is used in the construction mass_fraction_of_X_in_Y, where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X).
Change Date: Feb. 3, 2020, 2:15 p.m.
Term: mass_fraction_of_cloud_liquid_water_in_air
Unit: 1
Unit ref: UUUU
AMIP: clw
GRIB:
"Mass fraction" is used in the construction "mass_fraction_of_X_in_Y", where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical species or biological group denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". "Cloud liquid water" refers to the liquid phase of cloud water. A diameter of 0.2 mm has been suggested as an upper limit to the size of drops that shall be regarded as cloud drops; larger drops fall rapidly enough so that only very strong updrafts can sustain them. Any such division is somewhat arbitrary, and active cumulus clouds sometimes contain cloud drops much larger than this. Reference: AMS Glossary http://glossary.ametsoc.org/wiki/Cloud_drop.