Hi John, Couple of points:
Biogenic silica isn't simply silicon dioxide - it's the hydrated amorphous form commonly known as opal. How about replacing 'silicon dioxide' by 'hydrated silicon dioxide (opal)'? I find 'moles_of_nitrogen_per_unit_mass_in_sea_water' ambiguous. Do you mean dissolved, particulate or particulate+dissolved and organic, inorganic or total (organic+inorganic). I'm guessing you're aiming at dissolved NO3+NO2+NH4, in which case 'dissolved_total_inorganic_nitrogen' might suit. Possible replace 'Chlorophyll is the green pigment ' by 'Chlorophylls are the green pigments'. There's also at least six of them if the divinyl forms are taken into account - maybe replacing 'five' by 'several' is the way to go. I'm not totally comfortable with the organic carbon definition - it doesn't really tell me anything. How about 'Organic carbon is the carbon remaining in a sample after carbonates and bicarbonates have been removed by acidification' Cheers, Roy. ________________________________________ From: CF-metadata [[email protected]] On Behalf Of John Graybeal [[email protected]] Sent: 13 September 2013 00:05 To: CF Metadata List Subject: [CF-metadata] request #1 for names: mole concentrations and mass fractions, similar to current names Hi, This is the first in a series of standard name requests. I've tried to group the requests meaningfully, and I apologize in advance if I need a fair bit of CF wisdom going forward through this process. In this set of requests, there is a reasonable similarity to other existing names, and I've given an example or two for comparison under the "Analogs" section for each. -- Name: mole_concentration_of_particulate_matter_expressed_as_biogenic_silicon_per_unit_mass_in_sea_water -- Units: mol kg -1 -- Definition: Concentration in sea water of silicon dioxide particles produced by living organisms, presented as moles per unit mass. Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. -- Analogs: mole_concentration_of_particulate_matter_expressed_as_silicon_in_sea_water -- Notes: A more narrow form of the analog, and is per unit mass instead of volume -- Name: mole_concentration_of_particulate_matter_expressed_as_lithogenic_silicon_per_unit_mass_in_sea_water -- Units: mol kg -1 -- Definition: Concentration in sea water of silicon dioxide particles produced from terrestrial rocks and soil, presented as moles per unit mass. The concept moles_of_X_per_unit_mass_in_Y is also called "molality" of X in Y, where X is a material constituent of Y. -- Analogs: mole_concentration_of_particulate_matter_expressed_as_silicon_in_sea_water -- Notes: A more narrow form of the analog, and is per unit mass instead of volume -- Name: moles_of_nitrogen_per_unit_mass_in_sea_water -- Units: mol kg-1 -- Definition: Concentration of nitrogen in sea water, presented as number of moles per unit mass. The concept moles_of_X_per_unit_mass_in_Y is also called "molality" of X in Y, where X is a material constituent of Y. -- Analogs: moles_of_nitrate_per_unit_mass_in_sea_water -- Notes: Is this better as "mole_concentration_of_nitrogen_per_unit_mass_in_sea_water", to match a more prevalent pattern? -- Name: mole_concentration_of_dissolved_phosphorus_per_unit_mass_in_sea_water -- Units: mol kg-1 -- Definition: Concentration of dissolved phosphorus in sea water, presented as number of moles per unit mass. The concept moles_of_X_per_unit_mass_in_Y is also called "molality" of X in Y, where X is a material constituent of Y. -- Analogs: mole_concentration_of_particulate_organic_carbon_in_sea_water -- Name: mass_fraction_of_chlorophyll_a_in_sea_water -- Units: 1 -- Definition: Proportion of the chlorophyll a pigment in sea water. Mass fraction is used in the construction mass_fraction_of_X_in_Y, where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. Chlorophyll is the green pigment found in most plants, algae and cyanobacteria; it's presence is essential for photosynthesis to take place. There are five different forms of chlorophyll that occur naturally; all contain a chlorin ring which gives the green pigment and a side chain whose structure varies. Chlorophyll-a is the most commonly occurring form of natural chlorophyll. -- Analogs: mass_concentration_of_chlorophyll_a_in_sea_water -- Name: mass_fraction_of_particulate_organic_carbon_in_sea_water -- Units: 1 -- Definition: Proportion of carbon particles from organic sources in sea water. Mass fraction is used in the construction mass_fraction_of_X_in_Y, where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. Organic carbon describes a family of chemical species and is the term used in standard names for all species belonging to the family that are represented within a given model. The list of individual species that are included in a quantity having a group chemical standard name can vary between models. Where possible, the data variable should be accompanied by a complete description of the species represented, for example, by using a comment attribute. Particulate organic carbon is in the form of particles too big to pass through a filter. -- Analogs: mole_concentration_of_particulate_organic_matter_expressed_as_nitrogen_in_sea_water, mass_fraction_of_primary_particulate_organic_matter_dry_aerosol_in_air -- Notes: Is this better as "mass_fraction_of_particulate_organic_matter_expressed_as_carbon_in_sea_water"? I don't understand the purpose of the indirection "particulate_organic_matter_expressed_as_X", as opposed to just "particulate_organic_X", but it appears to be a pattern. Thank you for your consideration of these requests. John ------------------------------------ John Graybeal Senior Data Manager, Metadata and Semantics T +1 (408) 675-5545 F +1 (408) 616-1626 skype: graybealski Marinexplore 920 Stewart Drive Sunnyvale, CA _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata 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. _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
