Dear Martin, Thanks for pointing me to that thread, it was very useful. The standard names I am proposing are similar in concept to the existing 'thickness_of_liquid_water_cloud', so I guess the proposed names make sense. I can think of two possible options:
The one that I originally proposed: - liquid_cloud_area_fraction - ice_cloud_area_fraction - liquid_cloud_area_fraction_in_atmosphere_layer - ice_cloud_area_fraction_in_atmosphere_layer Or - liquid_water_cloud_area_fraction - ice_water _cloud_area_fraction - liquid_water _cloud_area_fraction_in_atmosphere_layer - ice_water_cloud_area_fraction_in_atmosphere_layer The second set of names seems to be more consistent with existing names. Regards, Alejandro > -----Original Message----- > From: CF-metadata [mailto:[email protected]] On Behalf Of > Martin Raspaud > Sent: 21 February 2015 21:24 > To: [email protected] > Subject: Re: [CF-metadata] Proposal for standard names: liquid and ice cloud > fractions > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Alejandro, > > Not sure it's related, but there was a thread on cloud physical > properties a few year ago: > http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2011/048566.html > > Best regards, > Martin > > > On 2015-02-20 17:59, Bodas-Salcedo, Alejandro wrote: > > Dear All, > > > > I would like to propose new standard names for liquid and ice cloud > > fractions (as far as I can see, they don't exist). I am not sure if > > they follow the spirit of the CF conventions because cloud phase is > > not a well defined concept. I would appreciate your comments on > > this. > > > > Regards, > > > > Alejandro > > > > ** liquid_cloud_area_fraction > > > > "X_area_fraction" means the fraction of horizontal area occupied by > > X. "X_area" means the horizontal area occupied by X within the grid > > cell. Cloud area fraction is also called "cloud amount" and "cloud > > cover". The cloud area fraction is for the whole atmosphere column, > > as seen from the surface or the top of the atmosphere. The cloud > > area fraction in a layer of the atmosphere has the standard name > > cloud_area_fraction_in_atmosphere_layer. > > > > Units: 1 > > > > ** ice_cloud_area_fraction > > > > "X_area_fraction" means the fraction of horizontal area occupied by > > X. "X_area" means the horizontal area occupied by X within the grid > > cell. Cloud area fraction is also called "cloud amount" and "cloud > > cover". The cloud area fraction is for the whole atmosphere column, > > as seen from the surface or the top of the atmosphere. The cloud > > area fraction in a layer of the atmosphere has the standard name > > cloud_area_fraction_in_atmosphere_layer. > > > > Units: 1 > > > > ** liquid_cloud_area_fraction_in_atmosphere_layer > > > > "Layer" means any layer with upper and lower boundaries that have > > constant values in some vertical coordinate. There must be a > > vertical coordinate variable indicating the extent of the layer(s). > > If the layers are model layers, the vertical coordinate can be > > model_level_number, but it is recommended to specify a physical > > coordinate (in a scalar or auxiliary coordinate variable) as well. > > "X_area_fraction" means the fraction of horizontal area occupied by > > X. "X_area" means the horizontal area occupied by X within the grid > > cell. Cloud area fraction is also called "cloud amount" and "cloud > > cover". > > > > Units: 1 > > > > ** ice_cloud_area_fraction_in_atmosphere_layer > > > > "Layer" means any layer with upper and lower boundaries that have > > constant values in some vertical coordinate. There must be a > > vertical coordinate variable indicating the extent of the layer(s). > > If the layers are model layers, the vertical coordinate can be > > model_level_number, but it is recommended to specify a physical > > coordinate (in a scalar or auxiliary coordinate variable) as well. > > "X_area_fraction" means the fraction of horizontal area occupied by > > X. "X_area" means the horizontal area occupied by X within the grid > > cell. Cloud area fraction is also called "cloud amount" and "cloud > > cover". > > > > Units: 1 > > > > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.22 (GNU/Linux) > > iQEcBAEBAgAGBQJU6PeAAAoJEBdvyODiyJI4VyMH+wZTMwiq5lmoRWtyZby > Rhl0n > xB68uWL2oEE/06SS037cc3NKZfXGzx6blt/6ytsr7gsStBLdaKnT0sxnIxfMauF3 > KhiqggNWFbqoaZHw0mjmewFxA/eNspgKs4+lQbIh0B5dvTcwRmDZHwzCu8v/xK > xM > q/7m/TT0N4y0APEWYCc0SNdM0MClc9PgEIhdunZfj1BlhjeRXAZX26wKRasgUjot > QCFY25hDo2fY8acrFM3yB5Ao4qSh/nCftRi/qI5wy59/tupdVugLX+hK1teMcUAe > H5Zro/sU1toC1+wEm4gYyorMaLymgEeNIva5hnt42TMne+vlmswswU2BtYnoZf4= > =EqCj > -----END PGP SIGNATURE----- _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
