Dear David
A standard name modifier is the mechanism I would suggest too if we needed one,
but on the other hand (a) in practice the standard name modifiers have caused
complications, discussed in trac tickets, which makes it a less attractive
mechanism, and (b) there are currently only five anomaly standard names, so
this doesn't presently seem to be a need which requires a special mechanism.
By comparison we have hundreds of standard names involving chemical species,
all individually proposed, and so far that has worked all right.
Best wishes
Jonathan
.----- Forwarded message from David Hassell <d.c.hassell at reading.ac.uk> -----
> Date: Thu, 31 Mar 2016 11:17:11 +0100
> From: David Hassell <d.c.hassell at reading.ac.uk>
> To: Jonathan Gregory <j.m.gregory at reading.ac.uk>
> CC: cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] Standard attributes for anomaly
> User-Agent: Mutt/1.5.21 (2010-09-15)
>
> Hello,
>
> Could a new standard name modifier of "anomaly" be created for this
> case?
>
> http://cfconventions.org/cf-conventions/v1.6.0/cf-conventions.html#standard-name-modifiers
>
> This example would then look like:
>
> mean_sst:standard_name = "sea_surface_foundation_temperature anomaly" ;
>
> As for some existing standard modifiers, the units of the modified
> standard name would have to be dimensionally equivalent to those for
> the unmodified standard name.
>
> This seems poosible within the current conventions, and in their
> spirit, I think.
>
> All the best,
>
> David
>
> ---- Original message from Jonathan Gregory (06PM 30 Mar 16)
>
> > Date: Wed, 30 Mar 2016 18:35:52 +0100
> > From: Jonathan Gregory <j.m.gregory at reading.ac.uk>
> > To: cf-metadata at cgd.ucar.edu
> > Subject: Re: [CF-metadata] Standard attributes for anomaly
> > User-Agent: Mutt/1.5.20 (2009-12-10)
> >
> > Dear Roy
> >
> > Once this pattern is established, it is unlikely that there would be any
> > objection to proposals for new X_anomaly (or anomaly_in_X) standard names.
> > When new names are proposed with existing patterns applied to existing vocab,
> > it's hardly ever a problem, but standard names are never added to the table
> > automatically or assumed to exist. They have to be proposed, to prevent the
> > possibility of something nonsensical being added.
> >
> > If we were really flooded with anomaly names, then it would be better to
> > consider putting the "anomaly" indicator somewhere else, requiring a change
> > to the convention to be devised. That is possible, but it has not threatened
> > to happen yet, and we don't do things unless we need to!
> >
> > Best wishes
> >
> > Jonathan
> >
> > ----- Forwarded message from Roy Mendelssohn - NOAA Federal <roy.mendelssohn at noaa.gov> -----
> >
> > > Date: Wed, 30 Mar 2016 10:10:34 -0700
> > > From: Roy Mendelssohn - NOAA Federal <roy.mendelssohn at noaa.gov>
> > > To: Jonathan Gregory <j.m.gregory at reading.ac.uk>
> > > CC: cf-metadata at cgd.ucar.edu
> > > Subject: Re: [CF-metadata] Standard attributes for anomaly
> > > X-Mailer: Apple Mail (2.3124)
> > >
> > > Hi Jonathan:
> > >
> > > It strikes me that anomalies are pretty common, and the in the long-run it would be easy to have ?anomaly? added to the approved transformations, so that one can just take a standard name and append anomaly somewhere to have a new valid standard name without having to seek approval.
> > >
> > > Perhaps I am missing something, but if I were to propose anything it would be what I state above.
> > >
> > > -Roy
> > >
> > > > On Mar 30, 2016, at 8:27 AM, Jonathan Gregory <j.m.gregory at reading.ac.uk> wrote:
> > > >
> > > > Dear Roy
> > > >
> > > > There are a handful of standard names for anomalies of the form X_anomaly,
> > > > where X is some other standard name. You could propose a new one for this.
> > > > It could be sea_surface_foundation_temperature_anomaly, like the existing ones,
> > > > but if that's too hard to understand,
> > > > anomaly_in_sea_surface_foundation_temperature
> > > > might be clearer.
> > > >
> > > > "anomaly" could be handled by some other new CF convention if it was needed
> > > > for hundreds of quantities. This is of course possible, but so far there have
> > > > been few requests for anomaly names, so it's easier and sufficient to create
> > > > new standard names for them, I think.
> > > >
> > > > Best wishes
> > > >
> > > > Jonathan
> > > >
> > > > ----- Forwarded message from Roy Mendelssohn - NOAA Federal <roy.mendelssohn at noaa.gov> -----
> > > >
> > > >> Date: Wed, 30 Mar 2016 08:16:52 -0700
> > > >> From: Roy Mendelssohn - NOAA Federal <roy.mendelssohn at noaa.gov>
> > > >> To: CF metadata <cf-metadata at cgd.ucar.edu>
> > > >> Subject: [CF-metadata] Standard attributes for anomaly
> > > >> X-Mailer: Apple Mail (2.3124)
> > > >>
> > > >> Hi All:
> > > >>
> > > >> We have been given files related o sea surface temperature. The observed value has the attributes:
> > > >>
> > > >> analysed_sst:long_name = "analysed sea surface temperature" ;
> > > >> analysed_sst:standard_name = "sea_surface_foundation_temperature" ;
> > > >>
> > > >>
> > > >> and the climatology has the attributes:
> > > >>
> > > >> mean_sst:long_name = "climatological mean sea surface temperature" ;
> > > >> mean_sst:standard_name = "sea_surface_foundation_temperature" ;
> > > >>
> > > >> What would be the proper attributes for the anomaly calculated from these?
> > > >>
> > > >> Thanks,
> > > >>
> > > >> -Roy
> > > >>
> > > >> **********************
> > > >> "The contents of this message do not reflect any position of the U.S. Government or NOAA."
> > > >> **********************
> > > >> Roy Mendelssohn
> > > >> Supervisory Operations Research Analyst
> > > >> NOAA/NMFS
> > > >> Environmental Research Division
> > > >> Southwest Fisheries Science Center
> > > >> ***Note new address and phone***
> > > >> 110 Shaffer Road
> > > >> Santa Cruz, CA 95060
> > > >> Phone: (831)-420-3666
> > > >> Fax: (831) 420-3980
> > > >> e-mail: Roy.Mendelssohn at noaa.gov www: http://www.pfeg.noaa.gov/
> > > >>
> > > >> "Old age and treachery will overcome youth and skill."
> > > >> "From those who have been given much, much will be expected"
> > > >> "the arc of the moral universe is long, but it bends toward justice" -MLK Jr.
> > > >>
> > > >> _______________________________________________
> > > >> CF-metadata mailing list
> > > >> CF-metadata at cgd.ucar.edu
> > > >> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
> > > >
> > > > ----- End forwarded message -----
> > > > _______________________________________________
> > > > CF-metadata mailing list
> > > > CF-metadata at cgd.ucar.edu
> > > > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
> > >
> > > **********************
> > > "The contents of this message do not reflect any position of the U.S. Government or NOAA."
> > > **********************
> > > Roy Mendelssohn
> > > Supervisory Operations Research Analyst
> > > NOAA/NMFS
> > > Environmental Research Division
> > > Southwest Fisheries Science Center
> > > ***Note new address and phone***
> > > 110 Shaffer Road
> > > Santa Cruz, CA 95060
> > > Phone: (831)-420-3666
> > > Fax: (831) 420-3980
> > > e-mail: Roy.Mendelssohn at noaa.gov www: http://www.pfeg.noaa.gov/
> > >
> > > "Old age and treachery will overcome youth and skill."
> > > "From those who have been given much, much will be expected"
> > > "the arc of the moral universe is long, but it bends toward justice" -MLK Jr.
> > >
> >
> > ----- End forwarded message -----
> > _______________________________________________
> > CF-metadata mailing list
> > CF-metadata at cgd.ucar.edu
> > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
>
> --
> David Hassell
> National Centre for Atmospheric Science (NCAS)
> Department of Meteorology, University of Reading,
> Earley Gate, PO Box 243,
> Reading RG6 6BB, U.K.
>
> Tel : +44 118 3785613
> E-mail: d.c.hassell at reading.ac.uk
----- End forwarded message -----
Received on Thu Mar 31 2016 - 06:28:48 BST
