Dear Martin, On 06/04/18 16:02, Martin Juckes - UKRI STFC wrote:
> the four names for methane, water vapor, carbon monoxide and nitrogen dioxide > result from simple application of existing CF name patterns, so I support > their adoption as you have proposed them. > >> * atmosphere_mole_content_of_methane >> * atmosphere_mole_content_of_water_vapor >> * atmosphere_mole_content_of_carbon_monoxide >> * atmosphere_mole_content_of_nitrogen_dioxide > > > For semiheavy-water, there is a related discussion about variable required > for CMIP6 by PMIP: > > : http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2018/059995.html > > > For PMIP we need names referring to multiple isotopic variants of water > vapor: H-2H-O, H2-O17, H2-O18. We have taken an approach which allows us to > be precise in the name and deal with all these variants: > > e.g. precipitation_flux_containing_2H. This has not been accepted yet, but > has some support. Would you be happy to use: > > atmosphere_mole_content_of_water_vapor_containing_2H > > with help text which makes it clear that this means a single "2H" atom per > water molecule? > > e.g. "The expression A_containing_B refers to the amount of A which contains > B. When B is an isotope, it refers to molecules of A which contain one atom > of B, unless indicated otherwise by a number following B." I'm happy to use anything that is clear and consistent with other names. I don't think isotopes have been used in names before, so we're on uncharted territory. I understand the need to be more accurate than what I have, although this notation required some getting used to. I assume that "containing_18O" is for H_2(18-O). That modification is fine with me if the CMIP6 proposal gets through. If that proposal gets through with modifications, then I prefer to be consistent with those modifications as well. Kind regards, Maarten > ________________________________ > From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Maarten > Sneep <maarten.sn...@knmi.nl> > Sent: 06 April 2018 13:00 > To: cf-metadata@cgd.ucar.edu > Subject: Re: [CF-metadata] Standard name proposal related to methane, water > vapor, carbon monoxide, semi-heavy water, and nitrogen dioxide. > > Hi, > > I haven't heard anything after sending this in. Can these names be considered > for > inclusion in the standard_name list? > > Kind regards, > > Maarten Sneep > > On 23/02/18 15:04, Maarten Sneep wrote: >> Hi, >> >> I'd like to propose the following standard names: >> >> * atmosphere_mole_content_of_methane >> * atmosphere_mole_content_of_water_vapor >> * atmosphere_mole_content_of_carbon_monoxide >> * atmosphere_mole_content_of_semiheavy_water_vapor >> * atmosphere_mole_content_of_nitrogen_dioxide >> >> Details are provided below. >> >> atmosphere_mole_content_of_methane >> Canonical units: mol/m2 >> Description: "Content" indicates a quantity per unit area. The "atmosphere >> content" >> of a quantity refers to the vertical integral from the surface to the top of >> the >> atmosphere. For the content between specified levels in the atmosphere, >> standard >> names including "content_of_atmosphere_layer" are used. The construction >> "atmosphere_mole_content_of_X" means the vertically integrated number of >> moles of X >> above a unit area. The chemical formula for methane is CH4. Methane is a >> member of >> the group of hydrocarbons known as alkanes. There are standard names for the >> alkane >> group as well as for some of the individual species. >> >> (References: atmosphere_mass_content_of_methane, >> atmosphere_mole_content_of_ozone; >> for ozone both mole content and mass content exist). >> >> >> atmosphere_column_average_mole_fraction_of_methane_in_dry_air >> Canonical units: 1 >> >> >> atmosphere_mole_content_of_water_vapor >> Canonical units: mol/m2 >> Description: "Content" indicates a quantity per unit area. The "atmosphere >> content" >> of a quantity refers to the vertical integral from the surface to the top of >> the >> atmosphere. For the content between specified levels in the atmosphere, >> standard >> names including "content_of_atmosphere_layer" are used. The construction >> "atmosphere_mole_content_of_X" means the vertically integrated number of >> moles of X >> above a unit area. The chemical formula for water is H2O. Atmosphere water >> vapor >> content is sometimes referred to as "precipitable water", although this term >> does not >> imply the water could all be precipitated. >> >> (References: atmosphere_mass_content_of_water_vapor, >> atmosphere_mole_content_of_ozone; for ozone both mole content and mass >> content exist). >> >> >> atmosphere_mole_content_of_carbon_monoxide >> Canonical units: mol/m2 >> Description: "Content" indicates a quantity per unit area. The "atmosphere >> content" >> of a quantity refers to the vertical integral from the surface to the top of >> the >> atmosphere. For the content between specified levels in the atmosphere, >> standard >> names including "content_of_atmosphere_layer" are used. The construction >> "atmosphere_mole_content_of_X" means the vertically integrated number of >> moles of X >> above a unit area. The chemical formula for carbon monoxide is CO. >> >> (References: atmosphere_mass_content_of_carbon_monoxide, >> atmosphere_mole_content_of_ozone; for ozone both mole content and mass >> content exist). >> >> >> atmosphere_mole_content_of_semiheavy_water_vapor >> Canonical units: mol/m2 >> Description: "Content" indicates a quantity per unit area. The "atmosphere >> content" >> of a quantity refers to the vertical integral from the surface to the top of >> the >> atmosphere. For the content between specified levels in the atmosphere, >> standard >> names including "content_of_atmosphere_layer" are used. The construction >> "atmosphere_mole_content_of_X" means the vertically integrated number of >> moles of X >> above a unit area. The chemical formula for semi-heavy water is HDO, water >> with one >> hydrogen replaced by deuterium. >> >> Note: This one is tricky, HDO is not D2O, so the correct term is not heavy >> water. >> Open for suggestions here. >> >> >> atmosphere_mole_content_of_nitrogen_dioxide >> Canonical units: mol/m2 >> Description: "Content" indicates a quantity per unit area. The "atmosphere >> content" >> of a quantity refers to the vertical integral from the surface to the top of >> the >> atmosphere. For the content between specified levels in the atmosphere, >> standard >> names including "content_of_atmosphere_layer" are used. The construction >> "atmosphere_mole_content_of_X" means the vertically integrated number of >> moles of X >> above a unit area. The chemical formula for nitrogen_dioxide is NO2. >> >> (References: troposphere_mole_content_of_nitrogen_dioxide, >> stratosphere_mole_content_of_nitrogen_dioxide). > > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > Maarten Sneep -- KNMI T: 030 2206747 E: maarten.sn...@knmi.nl R: A2.14 _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
