Dear Alejandro That looks good to me. Thanks. Yes, I agree, you might see "ice" used for other frozen substances than water (including "dry ice") but I don't believe we use it in that more general sense in CF standard names.
Best wishes Jonathan ----- Forwarded message from "Bodas-Salcedo, Alejandro" <[email protected]> ----- > Date: Tue, 24 Feb 2015 10:14:21 +0000 > From: "Bodas-Salcedo, Alejandro" <[email protected]> > To: "Gregory, Jonathan" <[email protected]>, > "[email protected]" <[email protected]> > Subject: RE: [CF-metadata] Fwd: Re: Proposal for standard names: liquid and > ice cloud fractions > > Dear Jonathan, > > Thanks for your comment. When I proposed ice_water_cloud I was trying to keep > the same format for both phases, but I ice_cloud seems fine to me (I've seen > 'ice' used for other compounds, but perhaps it's not correct). > With this change, the names would be: > > - liquid_water_cloud_area_fraction > - ice_cloud_area_fraction > - liquid_water_cloud_area_fraction_in_atmosphere_layer > - ice_cloud_area_fraction_in_atmosphere_layer > > Regards, > > Alejandro > > > -----Original Message----- > > From: CF-metadata [mailto:[email protected]] On Behalf Of > > Jonathan Gregory > > Sent: 24 February 2015 06:47 > > To: [email protected] > > Subject: [CF-metadata] Fwd: Re: Proposal for standard names: liquid and ice > > cloud > > fractions > > > > Dear Alejandro > > > > I think that liquid_water_cloud would be preferable to liquid_cloud, on > > grounds of consistency as you say, and also clarity. liquid_water is a > > phrase > > used in many standard names to refer to cloud composition e.g. > > atmosphere_mass_content_of_convective_cloud_liquid_water > > to give just one example. What would ice_water_cloud mean? The phrase > > ice_cloud is used in the existing standard_name > > number_concentration_of_ice_crystals_in_air_at_ice_cloud_top > > so I think ice_cloud would be OK to use if that's what you mean. > > > > Best wishes > > > > Jonathan > > > > > > ----- Forwarded message from "Bodas-Salcedo, Alejandro" > > <[email protected]> ----- > > > > > Date: Mon, 23 Feb 2015 11:25:21 +0000 > > > From: "Bodas-Salcedo, Alejandro" <[email protected]> > > > To: 'Martin Raspaud' <[email protected]>, "[email protected]" > > > <[email protected]> > > > Subject: Re: [CF-metadata] Proposal for standard names: liquid and ice > > > cloud > > > fractions > > > > > > 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 > > > > ----- End forwarded message ----- > > _______________________________________________ > > CF-metadata mailing list > > [email protected] > > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ----- End forwarded message ----- _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
