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:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of
> Jonathan Gregory
> Sent: 24 February 2015 06:47
> To: cf-metadata at cgd.ucar.edu
> 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"
> <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 Tue Feb 24 2015 - 03:14:21 GMT
