Dear Dan, All, Thank you, Dan, for proposing these six new standard names and to all those who have provided comments.
The standard names as proposed are absolutely fine - we do already have about eighty existing hfc/cfc/hcfc names. The quantities would all have a canonical unit of '1' as they are dimensionless. The descriptions are certainly important and it is indeed our usual practice to include the IUPAC name in the definition (if it is not used as the species identifier in the standard name itself). Standard names consist of lower case and upper case letters, digits and underscores. Punctuation characters such as commas are not used, which immediately excludes many IUPAC names from the standard name itself. The definitions are built from standard chunks of text, usually presented in the same order, and we agree definitions of new terminology at the same time as agreeing the names on the mailing list. Based on the names and descriptions already provided, and on the definitions of existing names, we would have the following. mole_fraction_of_hfc134a_in_air (Canonical unit: 1) 'Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for hfc134a is CF3CFH2. The IUPAC name for hfc134a is 1,1,1,2-tetrafluoroethane.' mole_fraction_of_hfc143a_in_air (Canonical unit: 1) 'Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for hfc143a is CF3CH3. The IUPAC name for hfc143a is 1,1,1-trifluoroethane.' mole_fraction_of_hfc125_in_air (Canonical unit: 1) 'Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for hfc125 is CF3CF2H. The IUPAC name for hfc125 is 1,1,1,2,2-pentafluoroethane.' mole_fraction_of_hfc152a_in_air (Canonical unit: 1) Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for hfc152a is CF2HCH3. The IUPAC name for hfc152a is 1,1-difluoroethane.' mole_fraction_of_hfc32_in_air (Canonical unit: 1) 'Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for hfc32 is CF2H2. The IUPAC name for hfc32 is difluoromethane.' mole_fraction_of_hfc23_in_air (Canonical unit: 1) 'Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The chemical formula for hfc23 is CF3H. The IUPAC name for hfc23 is trifluoromethane.' As these names and definitions are very similar to existing ones, and since the discussion seems to have reached agreement on the general approach, these names are accepted for publication in the standard name table and will be added in the next update (planned for 9th April). Jim is correct that it isn't necessary to propose the long names to the mailing list, because they are not standardized. As David explained, long_names are sometimes agreed within projects or between particular groups who share their data, but the content of the long_name attribute is not governed by the CF conventions. Best wishes, Alison ----------------------------------------------------------------------------------------------------------- Alison Pamment Tel: +44 1235 778065 NCAS/Centre for Environmental Data Analysis Email: alison.pamm...@stfc.ac.uk STFC Rutherford Appleton Laboratory R25, 2.22 Harwell Oxford, Didcot, OX11 0QX, U.K. From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> On Behalf Of John Graybeal Sent: 13 March 2019 15:27 To: Jim Biard <jbi...@cicsnc.org> Cc: CF Metadata List <cf-metadata@cgd.ucar.edu> Subject: Re: [CF-metadata] Addition of HFC standard names To which may I add, it’s a big relief not having commas in the standard name. That would break some software, I feel sure! In addition to not being pronounceable among the average technologist. john --------------------------------------- John Graybeal mailto:jbgrayb...@mindspring.com skype: graybealski On Mar 13, 2019, at 08:13, Jim Biard <mailto:jbi...@cicsnc.org> wrote: Dan, I think that in the conversation on this thread no one has made it entirely clear that the long name is not part of any submission to the standard name table. You should drop the long name. Grace and peace, Jim On 3/13/19 6:50 AM, Dan Say wrote: Hello Roy, Perfect - I have added chemical formulas to the descriptions, which I agree are a useful addition. See below. HFC nomenclature: Standard name: mole_fraction_of_hfc134a_in_air Long name: Mole fraction of 1,1,1,2-tetrafluoroethane (HFC-134a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc134a is 1,1,1,2-tetrafluoroethane, and the chemical formula is CF3CFH2. Standard name: mole_fraction_of_hfc143a_in_air Long name: Mole fraction of 1,1,1-trifluoroethane (HFC-143a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc143a is 1,1,1-trifluoroethane, and the chemical formula is CF3CH3. Standard name: mole_fraction_of_hfc125_in_air Long name: Mole fraction of 1,1,1,2,2-pentafluoroethane (HFC-125) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc125 is 1,1,1,2,2-pentafluoroethane, and the chemical formula is CF3CF2H. Standard name: mole_fraction_of_hfc152a_in_air Long name: Mole fraction of 1,1-difluoroethane (HFC-152a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc152a is 1,1-difluoroethane, and the chemical formula is CF2HCH3. Standard name: mole_fraction_of_hfc32_in_air Long name: Mole fraction of difluoromethane (HFC-32) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc32 is difluoromethane, and the chemical formula is CF2H2. Standard name: mole_fraction_of_hfc23_in_air Long name: Mole fraction of trifluoromethane (HFC-23) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc23 is trifluoromethane, and the chemical formula is CF3H. Assuming everyone is happy with these additions, how do we proceed? Cheers, Dan ________________________________ Dr Daniel Say Postdoctoral Research Associate Atmospheric Chemistry Research Group School of Chemistry University of Bristol Tel: (+44) 117 3317042 ________________________________________ From: Lowry, Roy K. Sent: 13 March 2019 10:44:54 To: Dan Say; Klaus Zimmermann; mailto:cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Addition of HFC standard names Dear Dan, As David pointed out, there is a precedent to your request with Standard Names like mole_fraction_of_hcfc142b_in_air, to which your 'HFC nomenclature' section conforms closely enough to make me happy. You could also add a chemical formula sentence along the lines of 'The chemical formula for HCFC142b is CH3CClF2.' to gild the lily. It was the absence of descriptions from your first submission that caused me concern. Had I been aware of the precedent (I searched hfc which didn't find hcfc) I would never have suggested including the IUPAC name in the Standard Name. Cheers, Roy. I have now retired but will continue to be active through an Emeritus Fellowship using this e-mail address. ________________________________________ From: CF-metadata on behalf of Dan Say Sent: 13 March 2019 09:44 To: Klaus Zimmermann; mailto:cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Addition of HFC standard names Thank you for the suggestion Klaus. I have updated the long names accordingly: HFC nomenclature: Standard name: mole_fraction_of_hfc134a_in_air Long name: Mole fraction of 1,1,1,2-tetrafluoroethane (HFC-134a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc134a is 1,1,1,2-tetrafluoroethane. Standard name: mole_fraction_of_hfc143a_in_air Long name: Mole fraction of 1,1,1-trifluoroethane (HFC-143a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc143a is 1,1,1-trifluoroethane. Standard name: mole_fraction_of_hfc125_in_air Long name: Mole fraction of 1,1,1,2,2-pentafluoroethane (HFC-125) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc125 is 1,1,1,2,2-pentafluoroethane. Standard name: mole_fraction_of_hfc152a_in_air Long name: Mole fraction of 1,1-difluoroethane (HFC-152a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc152a is 1,1-difluoroethane. Standard name: mole_fraction_of_hfc32_in_air Long name: Mole fraction of difluoromethane (HFC-32) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc32 is difluoromethane. Standard name: mole_fraction_of_hfc23_in_air Long name: Mole fraction of trifluoromethane (HFC-23) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The IUPAC name for hfc23 is trifluoromethane. IUPAC nomenclature: Standard name: mole_fraction_of_1,1,1,2-tetrafluoroethane_in_air Long name: Mole fraction of 1,1,1,2-tetrafluoroethane (HFC-134a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. 1,1,1,2-tetrafluoroethane is described by its common name, HFC-134a. Standard name: mole_fraction_of_1,1,1-trifluoroethane_in_air Long name: Mole fraction of 1,1,1-trifluoroethane (HFC-143a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. 1,1,1-trifluoroethane is described by its common name, HFC-143a. Standard name: mole_fraction_of_1,1,1,2,2-pentafluoroethane_in_air Long name: Mole fraction of 1,1,1,2,2-pentafluoroethane (HFC-125) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. 1,1,1,2,2-pentafluoroethane is described by its common name, HFC-125. Standard name: mole_fraction_of_1,1-difluoroethane_in_air Long name: Mole fraction of 1,1-difluoroethane (HFC-152a) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. 1,1-difluoroethane is described by its common name, HFC-152a. Standard name: mole_fraction_of_difluoromethane_in_air Long name: Mole fraction of difluoromethane (HFC-32) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. Difluoromethane is described by its common name, HFC-32. Standard name: mole_fraction_of_trifluoromethane_in_air Long name: Mole fraction of trifluoromethane (HFC-23) in air Definition: Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. Trifluoromethane is described by its common name, HFC-23. Cheers, Dan ________________________________ Dr Daniel Say Postdoctoral Research Associate Atmospheric Chemistry Research Group School of Chemistry University of Bristol Tel: (+44) 117 3317042 ________________________________________ From: CF-metadata on behalf of Klaus Zimmermann Sent: 13 March 2019 09:33:18 To: mailto:cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Addition of HFC standard names Good morning, just a technical clarification: long names are not standardized within cf, correct? Indeed, typical long names don't follow the snake_case convention, but are rather more free-form and human readable/understandable. They are chosen by the user, often giving information beyond the standard names. Examples from CMIP6 (Omon table, variables tos and tosga): tos: - standard name: sea_surface_temperature - long name: Sea Surface Temperature tosga: - standard name: sea_surface_temperature - long name: Global Average Sea Surface Temperature Cheers Klaus On 13/03/2019 10:11, Dan Say wrote: > Good morning, > > > I am happy to go with the IUPAC names if needs be however, hfc is > standard nomenclature and I would have thought the most likely term to > be searched. I also note that there are already standard names for > several HCFCs and CFCs, for which the standard names are > 'mole_fraction_of_cfc11_in_air' etc. Nevertheless, see below a list of > the requested standard/long names and definitions, using both HFC and > IUPAC nomenclature. I am happy for you to choose which ones we use, > please advise. > > > *HFC nomenclature:* > > > Standard name: mole_fraction_of_hfc134a_in_air > > Long name: mole_fraction_of_hfc134a_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. The > IUPAC name for hfc134a is 1,1,1,2-tetrafluoroethane. > > > Standard name: mole_fraction_of_hfc143a_in_air > > Long name: mole_fraction_of_hfc143a_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. The > IUPAC name for hfc143a is 1,1,1-trifluoroethane. > > > Standard name: mole_fraction_of_hfc125_in_air > > Long name: mole_fraction_of_hfc125_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. The > IUPAC name for hfc125 is 1,1,1,2,2-pentafluoroethane. > > > Standard name: mole_fraction_of_hfc152a_in_air > > Long name: mole_fraction_of_hfc152a_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. The > IUPAC name for hfc152a is 1,1-difluoroethane. > > > Standard name: mole_fraction_of_hfc32_in_air > > Long name: mole_fraction_of_hfc32_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. The > IUPAC name for hfc32 is difluoromethane. > > > Standard name: mole_fraction_of_hfc23_in_air > > Long name: mole_fraction_of_hfc23_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. The > IUPAC name for hfc23 is trifluoromethane. > > > > > > *IUPAC nomenclature:* > > > Standard name: mole_fraction_of_1,1,1,2-tetrafluoroethane_in_air > > Long name: mole_fraction_of_1,1,1,2-tetrafluoroethane_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. > 1,1,1,2-tetrafluoroethane is described by its common name, HFC-134a. > > > Standard name: mole_fraction_of_1,1,1-trifluoroethane_in_air > > Long name: mole_fraction_of_1,1,1-trifluoroethane_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. > 1,1,1-trifluoroethane is described by its common name, HFC-143a. > > > Standard name: mole_fraction_of_1,1,1,2,2-pentafluoroethane_in_air > > Long name: mole_fraction_of_1,1,1,2,2-pentafluoroethane_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. > 1,1,1,2,2-pentafluoroethane is described by its common name, HFC-125. > > > Standard name: mole_fraction_of_1,1-difluoroethane_in_air > > Long name: mole_fraction_of_1,1-difluoroethane_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. > 1,1-difluoroethane is described by its common name, HFC-152a. > > > Standard name: mole_fraction_of_difluoromethane_in_air > > Long name: mole_fraction_of_difluoromethane_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. > Difluoromethane is described by its common name, HFC-32. > > > Standard name: mole_fraction_of_trifluoromethane_in_air > > Long name: mole_fraction_of_trifluoromethane_in_air > > Definition: Mole fraction is used in the construction > mole_fraction_of_X_in_Y, where X is a material constituent of Y. > Trifluoromethane is described by its common name, HFC-23. > > > > Cheers, > > > Dan > > > > */________________________________ > /* > */ > /* > *Dr Daniel Say* > Postdoctoral Research Associate > Atmospheric Chemistry Research Group > School of Chemistry > University of Bristol > Tel: (+44) 117 3317042 > ------------------------------------------------------------------------ > *From:* Lowry, Roy K. > *Sent:* 12 March 2019 17:17:12 > *To:* Dan Say; mailto:cf-metadata@cgd.ucar.edu > *Subject:* Re: Addition of HFC standard names > > HI again, > > I'd prefer it to be somewhere in the Standard Name entry because that is > searchable either through the XML document on the CF site or through the > vocabulary servers handling Standard Names. That way your data gets > discovered by other communities who might search for > '1,1,1,2-tetrafluoroethane'. I've dealt with quite a few oceanographic > halocarbon data sets over the years, but had never come across the 'hfc' > nomenclature before. > > To my knowledge the long name doesn't get scraped by data discovery > systems. It is used more as usage metadata to help users better > understand the measurements. By all means include the IUPAC name in the > long name, but I would also keep the hfc synonym there. > > Cheers, Roy. > > I have now retired but will continue to be active through an Emeritus > Fellowship using this e-mail address. > > > ------------------------------------------------------------------------ > *From:* Dan Say > *Sent:* 12 March 2019 16:59 > *To:* Lowry, Roy K.; mailto:cf-metadata@cgd.ucar.edu > *Subject:* Re: Addition of HFC standard names > > > Hi Roy, > > > Would it make more sense to leave the standard name as suggested, but > replace 'hfc134a' with '1,1,1,2-tetrafluoroethane' in the long name, for > simplicity? This is my first venture into the CEDa archives so please > advise, I am happy to change the long names if needs be. > > > Cheers, > > > Dan > > > */________________________________ > /* > */ > /* > *Dr Daniel Say* > Postdoctoral Research Associate > Atmospheric Chemistry Research Group > School of Chemistry > University of Bristol > Tel: (+44) 117 3317042 > ------------------------------------------------------------------------ > *From:* Lowry, Roy K. > *Sent:* 12 March 2019 16:56:17 > *To:* Dan Say; mailto:cf-metadata@cgd.ucar.edu > *Subject:* Re: Addition of HFC standard names > > Dear Dan, > > I think it would be better to have the IUPAC names somewhere > (e.g. 1,1,1,2-tetrafluoroethane for hfc134a if Wikipedia is correct) in > the Standard Name entry. I'd be happy with it in the definition but > would not object to it being in the Standard Name itself. > > Cheers, Roy. > > I have now retired but will continue to be active through an Emeritus > Fellowship using this e-mail address. > > > ------------------------------------------------------------------------ > *From:* CF-metadata on behalf of Dan > Say > *Sent:* 12 March 2019 16:43 > *To:* mailto:cf-metadata@cgd.ucar.edu > *Subject:* [CF-metadata] Addition of HFC standard names > > > Dear All, > > I'd like to request an addition to the standard name list for > atmospheric measurements of hydrofluorocarbons HFC-134a, HFC-143a, > HFC-125, HFC-152a, HFC-32 and HFC-23. Here are the details of the > proposed standard names. > > Proposal for a new standard variable names: > > Names: > mole_fraction_of_hfc134a_in_air > mole_fraction_of_hfc143a_in_air > mole_fraction_of_hfc125_in_air > mole_fraction_of_hfc152a_in_air > mole_fraction_of_hfc32_in_air > mole_fraction_of_hfc23_in_air > > Description: Atmospheric measurements of hydrofluorocarbons (HFC) are > reported as mole fraction data in units of parts per trillion (ppt, > 1E-12). The long name will remain the same as the standard name. > > Thanks in advance, > > Dan > > */________________________________ > /* > */ > /* > *Dr Daniel Say* > Postdoctoral Research Associate > Atmospheric Chemistry Research Group > School of Chemistry > University of Bristol > Tel: (+44) 117 3317042 > > > This email and any attachments are intended solely for the use of the > named recipients. If you are not the intended recipient you must not > use, disclose, copy or distribute this email or any of its attachments > and should notify the sender immediately and delete this email from your > system. > UK Research and Innovation has taken every reasonable precaution to > minimise risk of this email or any attachments containing viruses or > malware but the recipient should carry out its own virus and malware > checks before opening the attachments. UK Research and Innovation does > not accept any liability for any losses or damages which the recipient > may sustain due to presence of any viruses. > Opinions, conclusions or other information in this message and > attachments that are not related directly to UK Research and Innovation > business are solely those of the author and do not represent the views > of UK Research and Innovation. > > > > This email and any attachments are intended solely for the use of the > named recipients. 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Opinions, conclusions or other information in this message and attachments that are not related directly to UK Research and Innovation business are solely those of the author and do not represent the views of UK Research and Innovation. _______________________________________________ CF-metadata mailing list mailto:CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- http://www.cicsnc.org/Visit us on http://www.facebook.com/cicsnc Jim Biard Research Scholar http://cicsnc.org/ http://ncsu.edu/ http://ncdc.noaa.gov/ formerly NOAA’s National Climatic Data Center 151 Patton Ave, Asheville, NC 28801 e: mailto:jbi...@cicsnc.org o: +1 828 271 4900 Connect with us on Facebook for https://www.facebook.com/NOAANCEIclimate and https://www.facebook.com/NOAANCEIoceangeo information, and follow us on Twitter at https://twitter.com/NOAANCEIclimate and https://twitter.com/NOAANCEIocngeo. _______________________________________________ CF-metadata mailing list mailto:CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
