Dear John
I should think it would be helpful to add per unit volume of *what*? to make
this clearer.
The existing name could be made an alias of one _per_unit_area if that is
generally thought to be a good idea.
Besy wishes
Jonathan
----- Forwarded message from John Graybeal <john.graybeal at marinexplore.com> -----
> From: John Graybeal <john.graybeal at marinexplore.com>
> Date: Tue, 4 Jun 2013 19:06:35 -0700
> To: CF Metadata List <cf-metadata at cgd.ucar.edu>
> X-Mailer: Apple Mail (2.1503)
> Subject: [CF-metadata] new standard name for primary productivity of carbon
> per unit volume
>
> I would like to request a CF standard name.
>
> Name: net_primary_productivity_of_carbon_per_unit_volume
> Units: kg m-3 s-1
> Definition: Net primary productivity is the excess of gross_primary_producivity (rate of synthesis of biomass per unit volume from inorganic precursors by autotrophs, or "producers", especially by photosynthesising plants using sunlight for energy) over the rate at which they themselves respire some of this biomass (plant_respiration, assuming all producers to be plants). "Productivity of carbon" refers to the production of biomass expressed as the mass of carbon which it contains.
>
> There is an existing net_primary_productivity_of_carbon, expressed per unit area. As we are making a data set available which is integrated over a vertical extent, producing values with units to match (i.e., kg m-3 s-1), a new standard name is needed.
>
> Note: It appears the definition of net primary productivity may assume the value will be measured as per unit area. This probably needs to be corrected.
>
> John
>
>
>
>
>
> ------------------------------------
> John Graybeal
> Senior Data Manager, Metadata and Semantics
>
> T +1 (408) 675-5545
> F +1 (408) 616-1626
> skype: graybealski
>
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> 920 Stewart Drive
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----- End forwarded message -----
Received on Wed Jun 05 2013 - 08:53:25 BST
