Dear Martin Thanks for these proposals. I think your new constructions A_containing_B and isotope_ratio_of_A_to_B are good ideas, which you need for these quantities. My previous posting about "frozen" and precipitation always being water apply to some of these as well.
Best wishes Jonathan ----- Forwarded message from Martin Juckes - UKRI STFC <[email protected]> ----- > Date: Tue, 3 Apr 2018 10:53:09 +0000 > From: Martin Juckes - UKRI STFC <[email protected]> > To: "[email protected]" <[email protected]> > CC: Jean-Yves Peterschmitt <[email protected]>, Didier > Roche <[email protected]> > Subject: [CF-metadata] PMIP Standard names: isotopic fluxes, mass contents > and ratios. > > Dear All, > > I would like to propose the following 12 standard names on behalf of the PMIP > team. They all relate to water molecules containing stable isotopes of > oxygen or hydrogen (17O, 18O, and 2H [deuterium]). > > (1) pr18O: Precipitation mass flux of water molecules that contain the > oxygen-18 isotope (H2 18O), including solid and liquid phases. [kg m-2 s-1] > > There is no current CF construction to refer to water containing a specific > isotope; the closest is ".._A_expressed_as_B", which refers to the amount of > a component B in A. We propose a new construction "_A_containing_B" which > refers to the amount of A which contains B: > > precipitation_flux_of_water_containing_18O > > (2) prsn18O: Precipitation mass flux of water molecules that contain the > oxygen-18 isotope (H2 18O), including solid phase only. [kg m-2 s-1] > > As (1), but for solid phase only. There does not appear to be a specific > standard name construction for the solid phase of water, but "_liquid_phase" > is used for the liquid phase, so "solid_phase" appears to be a natural > extension. > > precipitation_flux_of_solid_water_containing_18O > > (3) pr2h: Precipitation mass flux of water molecules that contain one atom of > the hydrogen-2 isotope (1H 2H O), including solid and liquid phases. [kg m-2 > s-1] > > As (1), but for 2H > precipitation_flux_of_water_containing_2H > > (4) prsn2h: Precipitation mass flux of water molecules that contain one atom > of the hydrogen-2 isotope (1H 2H O), including solid phase only. [kg m-2 s-1] > > As (2), but for 2H > precipitation_flux_of_solid_water_containing_2H > > (5) pr17O: Precipitation mass flux of water molecules that contain the > oxygen-17 isotope (H2 17O), including solid and liquid phases. [kg m-2 s-1] > > As (1), but for 17O > precipitation_flux_of_water_containing_17O > > (6) prsn17O: Precipitation mass flux of water molecules that contain the > oxygen-17 isotope (H2 17O), including solid phase only. [kg m-2 s-1] > > As (2), but for 17O > precipitation_flux_of_solid_water_containing_17O > > (7) prw18O: Water vapor path for water molecules that contain oxygen-18 (H2 > 18O) [kg m-2] > > This proposal follows the pattern of > mass_content_of_water_vapor_in_atmosphere_layer, with the "containing_18O" > specialisation: > > mass_content_of_water_vapor_containing_18O_in_atmosphere_layer > > (8) prw17O: Water vapor path for water molecules that contain oxygen-17 (H2 > 17O) [kg m-2] > > As (7), but for 17O > mass_content_of_water_vapor_containing_17O_in_atmosphere_layer > > (9) prw2H: Water vapor path for water molecules that contain one atom of the > hydrogen-2 isotope (1H 2H O) [kg m-2] > > As (7), but for 2H > mass_content_of_water_vapor_containing_2H_in_atmosphere_layer > > (10) sw18O: Ratio of abundance of oxygen-18 (18O) atoms to oxgen-16 (16O) > atoms in sea water [1] > > "Isotope ratio" is a widely used concept which is not yet represented in the > standard name list. Isotope ratios are the ratio of one isotope to another, > usually the most stable isotope (e.g. 16O for oxygen). In the standard names > we propose a cautious approach of explicitly stating both isotopes in the > ratio: > > isotope_ratio_of_18O_to_16O_in_sea_water > > The construction "isotope_ratio_A_to_B_" refers to the ratio of the number of > atoms of A to the number of atoms of B. > > (11) sw17O: Ratio of abundance of oxygen-17 (17O) atoms to oxgen-16 (16O) > atoms in sea water [1] > > As (10), but for 17O > isotope_ratio_of_17O_to_16O_in_sea_water > > (12) sw2H: Ratio of abundance of hydrogen-2 (2H) atoms to hydrogen-1 (1H) > atoms in sea water [1] > > As (10), but for 2H > isotope_ratio_of_2H_to_1H_in_sea_water > > regards, > Martin > > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ----- End forwarded message ----- _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
