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" <alejandro.bodas at metoffice.gov.uk> -----
> Date: Mon, 23 Feb 2015 11:25:21 +0000
> From: "Bodas-Salcedo, Alejandro" <alejandro.bodas at metoffice.gov.uk>
> To: 'Martin Raspaud' <martin.raspaud at smhi.se>, "cf-metadata at cgd.ucar.edu"
> <cf-metadata at cgd.ucar.edu>
> 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:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of
> > Martin Raspaud
> > Sent: 21 February 2015 21:24
> > To: cf-metadata at cgd.ucar.edu
> > 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
> > >
> > >
> >
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Received on Mon Feb 23 2015 - 23:46:36 GMT
