Hello Alison,

Surely the canonical unit for Dobson Units would be moles per square metre, 
with Dobson Units appearing as the scaled unit in the units parameter 
attribute. Making Dobson Units the canonical unit would be like having cm/s 
rather than m/s as a canonical unit.

Cheers, Roy.
________________________________________
From: CF-metadata [cf-metadata-boun...@cgd.ucar.edu] On Behalf Of 
alison.pamm...@stfc.ac.uk [alison.pamm...@stfc.ac.uk]
Sent: 03 December 2012 14:18
To: cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] new standard name proposal for total ozone in DU

Dear Christophe and Jonathan,

I also support this proposal. We don't currently have any standard names that 
use Dobson Units - I think UDUnits1 didn't support it. However, since it is 
defined in UDunits2 I don't see any problem with adding it.

Best wishes,
Alison

------
Alison Pamment                          Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre    Email: alison.pamm...@stfc.ac.uk
STFC Rutherford Appleton Laboratory
R25, 2.22
Harwell Oxford, Didcot, OX11 0QX, U.K.



> -----Original Message-----
> From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf
> Of Jonathan Gregory
> Sent: 27 November 2012 20:52
> To: cf-metadata@cgd.ucar.edu
> Subject: [CF-metadata] new standard name proposal for total ozone in DU
>
> Dear Christophe
>
> > So I'd like to propose the following variable name for total ozone
> > columns based on recommendations I was given:
> > - "atmosphere_mole_content_of_ozone" expressed in Dobson Units.
> > Dobson Unit (DU) is already defined in the UDUNIT package ans is
> > equivalent to 446.2 micromoles m-2.
>
> This seems fine to me. It is consistent in construction with existing
> names
> for a quantity in mol m-2.
>
> Best wishes
>
> Jonathan
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> CF-metadata@cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
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