Dear Paul,
I'm pretty sure the Canonical Unit should be Pascal, as with the existing partial pressure Standard Names. Note that this doesn't mean the data need to be in Pascals, it is just a way of expressing dimensionality in terms of SI. There is a field for the actual units of measure in the parameter attributes. There are existing partial pressure Standard Names for CO2 and CH4, with partial pressure defined using the following text. The partial pressure of a dissolved gas in sea water is the partial pressure in air with which it would be in equilibrium. The partial pressure of a gaseous constituent of air is the pressure which it alone would exert with unchanged temperature and number of moles per unit volume. What is needed for fugacity is this with a description of the difference between partial pressure and fugacity. What do you think of the following? Fugacity is the equivalent for a real gas to partial pressure for an ideal gas. The partial pressure of a dissolved gas in sea water is the partial pressure in air with which it would be in equilibrium. The partial pressure of a gaseous constituent of air is the pressure which it alone would exert with unchanged temperature and number of moles per unit volume. Cheers, Roy. I have now retired but will continue to be active through an Emeritus Fellowship using this e-mail address. ________________________________ From: CF-metadata <[email protected]> on behalf of Halloran, Paul <[email protected]> Sent: 20 September 2018 16:40 To: [email protected] Subject: [CF-metadata] New name: fugacity of CO2 Dear mailing list, I would like to propose a new standard name: ‘fugacity_of_carbon_dioxide_in_sea_water’ Variable name: fCO2 Units: μatm Definition: The fugacity of CO2 is its effective partial pressure. Thanks for your consideration of this, Paul _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata CF-metadata Info Page - mailman.cgd.ucar.edu<http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata> mailman.cgd.ucar.edu This is an unmoderated list for discussions about interpretation, clarification, and proposals for extensions or change to the CF conventions. ________________________________ This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system. ________________________________
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