Thanks Jonathan,

Yes, OK.

I guessed why you wanted the vaguer term!

Cheers, Roy.

-----Original Message-----
From: cf-metadata-boun...@cgd.ucar.edu 
[mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Jonathan Gregory
Sent: 30 April 2009 15:43
To: cf-metadata@cgd.ucar.edu; Lowry, Roy K
Subject: [CF-metadata] new standard name request for pH

Dear Roy

Thanks for clarification.

> pH_of_sea_water_defined_by_mole_concentration_of_hydrogen_ion_per_unit_mass 
> (free scale)
> pH_of_sea_water_defined_by_mole_concentration_of_hydrogen_ion_per_unit_volume 
> (NBS)

In other standard names, "mole concentration" means mol m-3. So the second
should be

> pH_of_sea_water_defined_by_mole_concentration_of_hydrogen_ion (NBS)

In existing names, we say "moles per unit mass" for mol kg-1. So the first is

> pH_of_sea_water_defined_by_moles_of_hydrogen_ion_per_unit_mass (free scale)

OK?

My main argument for plain pH_of_sea_water is that in many ocean models these
two quantities would be identical.

Cheers

Jonathan
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