[CF-metadata] OMIP standard_name surface_downward_mass_flux_of_carbon_dioxide

alison.pamment at stfc.ac.uk alison.pamment at stfc.ac.uk
Mon May 15 06:39:35 MDT 2017

Dear Paul,

I've just had a look at the carbon dioxide surface flux names. Just to clarify, for your name surface_downward_mass_flux_of_carbon_dioxide, I suggested that we use the existing name surface_downward_mass_flux_of_carbon_dioxide_expressed_as_carbon which has canonical units of kg m-2 s-1. My understanding was that the existing name would be suitable for your needs. Is that correct or do you need a different quantity? As you say, we also have an existing name surface_downward_mole_flux_of_carbon_dioxide with units of mol m-2 s-1 so you should choose the standard name with the appropriate units for your quantity.

For molecular oxygen and dimethyl sulphide we have introduced mole_flux names, however, we could also add mass_flux names with units of kg m-2 s-1 if that is more useful for OMIP.

Please let me know if you need any additional names - these quantities are quite straight forward so I think we could just add them as necessary in the next update of the table.

Best wishes,

Alison Pamment                                                       Tel: +44 1235 778065
Centre for Environmental Data Analysis         Email: alison.pamment at stfc.ac.uk
STFC Rutherford Appleton Laboratory     
R25, 2.22
Harwell Campus, Didcot, OX11 0QX, U.K.

From: Durack, Paul J. [mailto:durack1 at llnl.gov] 
Sent: 11 May 2017 20:49
To: cf-metadata at cgd.ucar.edu
Cc: Pamment, Alison (STFC,RAL,RALSP); John Dunne - NOAA Federal; James Orr
Subject: OMIP standard_name surface_downward_mass_flux_of_carbon_dioxide

In the large OMIP biogeochemistry request several carbon_dioxide names were requested. Of these surface_downward_mass_flux_of_carbon_dioxide was rejected, as surface_downward_mole_flux_of_carbon_dioxide already exists.

This relates to variables contained in the Biogeochemistry sheet - https://goo.gl/Fyr6QW

The rejection of this name has led to the situation where requested carbon_dioxide variables have different units:

surface_downward_mole_flux_of_carbon_dioxide, mol m-2 s-1 (Omon, 162)
surface_downward_mass_flux_of_carbon_dioxide_natural_analogue_expressed_as_carbon, kg m-2 s-11 (Omon, 163)
surface_downward_mass_flux_of_carbon_dioxide_abiotic_analogue_expressed_as_carbon, kg m-2 s-11 (Omon, 164)
surface_downward_mass_flux_of_carbon14_dioxide_abiotic_analogue_expressed_as_carbon, kg m-2 s-11 (Omon, 165)
surface_downward_mass_flux_of_carbon13_dioxide_abiotic_analogue_expressed_as_carbon13, kg m-2 s-11 (Omon, 166)
surface_downward_mole_flux_of_molecular_oxygen, mol m-2 s-1 (Omon, 167)
surface_upward_mole_flux_of_dimethyl_sulfide, mol m-2 s-1 (Omon, 168)

I wonder if this can be reconsidered so there is some consistency between the carbon_dioxide standard names and their units.



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