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BODC parameter semantic model parameter entity names
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Why so many different properties in S06 related to concentrations/proportions/ratios etc? (BODCNVS-1791) #74

Open dr-shorthair opened 1 year ago

dr-shorthair commented 1 year ago

We are attempting to define some soil chemical parameters using the NVS Parameter Usage model. Most soil chemical parameters are of the nature 'concentration or abundance of X using method Y on sample prepared by Z'. We don't expect to find all the required elements for soils in the NVS S03 S04 S05 S25 S26 vocabs, but S02 S06 S27 should service us.

However, S06 has a lot of terms related to proportions, concentrations, and ratios. It is not clear to us which of these base properties to use, when, to build the parameters.

For example, what is the relationship between

or between

Are these all somehow in a specialization hierarchy, perhaps with

at the top?

Is there an general rule to explain what parameter is a 'concentration' and what is a 'proportion'?

@meganrwong @abhritchie @ljgregory are involved.

meganrwong commented 1 year ago

related to this, when I search 'ratio' under chemical parameters builder it is not found as a concept. https://www.bodc.ac.uk/resources/vocabularies/vocabulary_builder/csmodel/ Rather, ratio is found within parameters that are "concentration of x.... " ('ratio of' is in the methods or calculations part of these parameters)

So there is a relationship between concentration and ratio too, under proportion?

btw I suspect soil scientists are very used to saying "ratio of" and would find it strange to use 'concentration of' (or 'proportion of'). So I think ideally it would be a parameter if appropriate. Here are some commonly used soil science examples -

  1. Total organic carbon/total nitrogen ratio - "Report C/N ratio on an oven-dry basis noting method codes involved for both % C and % N."
  2. A basic cation saturation ratio - " Report the specified cation ratio, noting the method used for exchangeable bases." eg - cmol/kg calcium : cmol/kg magnesium
meganrwong commented 1 year ago

some of our methods state "Report elemental concentrations (% or mg/kg of element) on an oven-dry basis" - which makes me wonder when if ever in the case of soil chem we would use 'proportion of'.

People are very familiar with 'percentage of' , thought I understand that is the UoM. If we said "concentration of...." the related UoM is percentage.

dr-shorthair commented 1 year ago

Any comments on this @gwemon @danibodc ??

gwemon commented 1 year ago

@dr-shorthair @meganrwong Following your request, we had a review of our recent addition of "Mass concentration" to the S06 vocabulary and of the P01 terms which are associated with it (all related to the eREEFs model output) and we realised that we introduced an inconsistency in the way we model this kinds of properties. Since the variables were all related to particles we should have modelled them as "Mass of particles xyz per unit volume of sediment by model prediction" and not used "Mass concentration". We will correct this.

gwemon commented 1 year ago

To avoid confusion we are going to deprecate "Mass concentration" since it is not used as part of our PUV semantic model and we will redirect users to the QUDT concept "Mass concentration" whenever such a concept is needed (e.g. when using I-ADOPT modelling) instead of duplicating it.

gwemon commented 1 year ago

Your question about proportion vs concentration is a good one and not straightforward to answer! I seem to recollect, that Roy had considered in the past when we started remodeling legacy terms whether we should call them all "Concentration". We opted to keep the two terms and make the Proportion parameters more explicit by adding Proportion by dry weight, Proportion by volume, Proportion by area etc.... It would be interested to know what the different communities' preferences or views would be and how we could better harmonise. If just considering the BODC PUV, then I would say that our general rule would be that for physical or unqualified objects like e.g. "particles" then we would avoid using "Concentration". For chemical parameters, if the entity is a chemical substance expressed relative to the mass or volume of a liquid then we always use the term "Concentration", if it is a chemical substance measured in a mixed matrix like e.g. sediments and the parameter is a quantification of that substance as an absolute concentration rather than its relative contribution in relation to the total mass or volume of the analysed sample then we would also use the term "Concentration". If it is a parameter derived from study of the mineralogical composition of rocks and sediments then P01 terms are expressed as "Proportion". But I'd like to bring Roy in the loop here! @roy-lowry am I getting that right?

meganrwong commented 1 year ago

Much thanks for this Gwen,

So this is where we are at atm with using 'concentration' v 'proportion', in light of your comments, with some examples -

  1. Properties where it makes sense to use concentration (ie most of our chemical parameters) are reported as, for example - (eg mg/kg or cmol/L cmol/kg. emg/L example- 'extractable Iron' 'on an oven dry basis'. method states - report 'Using the air-dry moisture to oven-dry moisture ratio to convert to an oven-dry concentration' so, we are using 'concentration' of 'extractable Iron' 'on an oven dry basis'.

  2. ?'proportion' of carbonates by Field test for carbonates with dilute HCl this is reported in % it is by 'Field test for carbonates with dilute HCl and effervescence class assessment' Here, not sure - could use proportion or concentration.....!?

  3. 'proportion' of 'gypsum' 'in oven dried soil' method states - Report as gypsum (%) in oven-dry (105°C) soil. Use the air-dry moisture to oven-dry moisture ratio to make the oven-dry conversion. The difference this is reported 'in oven dried soil' rather than 'on an oven dry soil basis'. So, 'proportion of' 'gypsum' 'in an oven dried soil' makes sense

That is where our list is at atm anyway, feedback welcome :)

roy-lowry commented 1 year ago

To me the difference between concentration and proportion is that the dimensions of the quotient and divisor for concentration are different e.g. mass/lengthlengthlength, but the dimensions of the quotient and divisor for proportion are the same e.g. mass/mass.

As an aside, one of my errors that I still regret was not to differentiate mass concentration, mole concentration and volume concentration in the way CF have to keep the mapping between term and dimensionality 1:1. This was a hangover of another error - enforcing a 1:1 mapping between P01 code and units - that I inherited and was partially fixed by restricting the practice to within BODC.

roy-lowry commented 1 year ago

regarding @meganrwong last message....

Following the dimensionality principle, I would agree with concentration for cmol/kg, cmol/kg etc. but would use proportion for mg/kg. I would say the HCl field test and gypsum are almost certainly mass/mass and therefore proportions.

Note that geology is more concerned with solid chemistry and so reporting in terms of mass/mass is much more common than in oceanography where reporting in terms of mass or moles/kg is more normal.

gwemon commented 1 year ago

Looking further into this now that you mentioned the units/dimension association Roy, I have checked what we have at the moment and all our "Proportion xyz" codes have units expressed as "percent". It could be that this was a consequence of a decision taken when we remodeled the terms. The picture is more mixed for the Concentration terms. Most tend to have explicit units for the quotient and the divisor even if these are of the same dimensions (see below), and we do have some Concentration codes with units in Percent too. So we cannot just base the decision on equivalence of dimensionality unless we review and change what we currently have.

Here ae the units listed against parameter codes where Property='Concentration" as it stands at the moment: Becquerels per kilogram 10 Femtograms per kilogram 12 Femtograms per litre 4 Femtomoles per kilogram 2 Femtomoles per litre 29 Grams per cubic metre 1 Grams per kilogram 1355 Kilograms per cubic metre 2 Micrograms per cubic metre 1 Micrograms per gram 13 Micrograms per kilogram 12211 Micrograms per litre 363 Micrograms per millilitre 10 Microlitres per litre 4 Micromoles per kilogram 299 Micromoles per litre 558 Micromoles per litre per hour 6 Milligrams per cubic metre 220 Milligrams per kilogram 2373 Milligrams per litre 48 Milligrams per square metre 29 Millilitres per cubic metre 1 Millilitres per litre 1 Millimoles per litre 1 Million atoms per kilogram 4 Moles per cubic metre 100 Nanograms per gram 205 Nanograms per kilogram 41 Nanograms per litre 780 Nanograms per microlitre 1 Nanomoles per kilogram 342 Nanomoles per litre 1197 Nanomoles per litre per hour 6 Parts per billion 16 Parts per billion by volume 8 Parts per million 2 Parts per million by volume 4 Parts per trillion by volume 66 Percent 289 Picograms per kilogram 8 Picograms per litre 2 Picomoles per cubic metre 891 Picomoles per kilogram 103 Picomoles per litre 470

gwemon commented 1 year ago

And this is the list of all "Concentration" concepts that are mapped to units of "Percent": Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of sediment Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of sediment <2000um Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of sediment <63um Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of sediment <63um by wet sieving, acid digestion and atomic absorption spectroscopy Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of sediment [amorphous phase] by oxalic acid extraction and inductively-coupled plasma atomic emission spectroscopy Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of suspended particulate material Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of suspended particulate material >0.4/0.45um by acid leaching of filter residue and inductively-coupled plasma mass spectrometry Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of aluminium {Al CAS 7429-90-5} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of biogenic silica {BSi opal} per unit dry weight of sediment Concentration of biogenic silica {BSi opal} per unit dry weight of suspended particulate material Concentration of biogenic silica {BSi opal} per unit dry weight of suspended particulate material by sediment trapping, oxidation and colorimetric analysis Concentration of calcite per unit dry weight of sediment by X-ray diffraction Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of sediment Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of sediment <63um by wet sieving, acid digestion and atomic absorption spectroscopy Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of suspended particulate material Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and inductively-coupled plasma atomic emission spectroscopy Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of suspended particulate material by centrifugation and inductively-coupled plasma atomic emission spectroscopy Concentration of calcium {Ca CAS 7440-70-2} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of carbon {C} per unit dry weight of biota {biological entity specified elsewhere} Concentration of carbon {C} per unit dry weight of suspended particulate material >GF/F by filtration and elemental analysis Concentration of carbon {C} per unit dry weight of suspended particulate material by filtration and elemental analysis Concentration of carbonate {CO32- CAS 3812-32-6} per unit dry weight of sediment Concentration of carbonate {CO32- CAS 3812-32-6} per unit dry weight of sediment 63-2000um by wet sieving and acidification weight loss Concentration of carbonate {CO32- CAS 3812-32-6} per unit dry weight of sediment <5um by wet sieving and acidification weight loss Concentration of carbonate {CO32- CAS 3812-32-6} per unit dry weight of sediment <63um by wet sieving and acidification weight loss Concentration of carbonate {CO32- CAS 3812-32-6} per unit dry weight of sediment by acidification weight loss Concentration of carbonate {CO32- CAS 3812-32-6} per unit dry weight of sediment by gasometric assay of acid-liberated CO2 Concentration of carbonate {CO32- CAS 3812-32-6} per unit dry weight of suspended particulate material Concentration of carbonate-associated and surface absorbed total iron per unit dry weight of sediment by leaching with 1M sodium acetate at pH 5 of leached sample residue from stage 1 of Chester et al (1988) and atomic absorption spectroscopy Concentration of carbonate-associated and surface absorbed total manganese per unit dry weight of sediment by leaching with 1M sodium acetate at pH 5 of leached sample residue from stage 1 of Chester et al (1988) and atomic absorption spectroscopy Concentration of chlorine {Cl CAS 7782-50-5} per unit dry weight of sediment by compression into pellets and X-ray fluorescence Concentration of chlorite per unit dry weight of sediment by X-ray diffraction Concentration of clay minerals per unit dry weight of sediment by X-ray diffraction Concentration of easily-reducible total iron per unit dry weight of sediment by leaching with 1M sodium acetate at pH 5 + 0.25M hydroxylamine hydrochloride of leached sample residue from stage 2 in Chester et al (1988) and atomic absorption spectroscopy Concentration of easily-reducible total manganese per unit dry weight of sediment by leaching with 1M sodium acetate at pH 5 + 0.25M hydroxylamine hydrochloride of leached sample residue from stage 2 in Chester et al (1988) and atomic absorption spectroscopy Concentration of feldspar per unit dry weight of sediment by X-ray diffraction Concentration of illite (pure) per unit dry weight of sediment by X-ray diffraction Concentration of illite mixed layer (10-14V) per unit dry weight of sediment by X-ray diffraction Concentration of inorganic carbon {inorganic_C CAS 7440-44-0} per unit dry weight of sediment <63um by wet sieving, ignition at 400C and elemental analysis Concentration of inorganic carbon {inorganic_C CAS 7440-44-0} per unit dry weight of sediment by ignition at 400C and elemental analysis Concentration of inorganic carbon {inorganic_C CAS 7440-44-0} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and elemental analysis and differencing results from acidified and unacidified samples Concentration of inorganic carbon {inorganic_C CAS 7440-44-0} per unit dry weight of suspended particulate material by centrifugation and elemental analysis and differencing results from acidified and unacidified samples Concentration of inorganic carbon {inorganic_C CAS 7440-44-0} per unit dry weight of suspended particulate material by sediment trapping and elemental analysis and differencing results from acidified and unacidified samples Concentration of inorganic carbon {inorganic_C CAS 7440-44-0} per unit dry weight of suspended particulate material by sediment trapping, acid digestion and atomic absorption spectroscopy and computation of carbon from calcium Concentration of inorganic nitrogen {inorganic_N} per unit dry weight of sediment <63um by wet sieving, ignition at 400C and elemental analysis Concentration of inorganic nitrogen {inorganic_N} per unit dry weight of sediment by ignition at 400C and elemental analysis Concentration of kaolinite per unit dry weight of sediment by X-ray diffraction Concentration of lipids per unit dry weight of biota {Asteroidea (ITIS: 156862: WoRMS 123080)} Concentration of lipids per unit dry weight of biota {Crangon crangon (ITIS: 97118: WoRMS 107552)} Concentration of lipids per unit dry weight of biota {Liocarcinus (ITIS: 660431: WoRMS 106925)} Concentration of lipids per unit dry weight of biota {Mollusca (ITIS: 69458: WoRMS 51) [Subcomponent: flesh]} Concentration of lipids per unit dry weight of biota {Trachinidae (ITIS: 170989: WoRMS 125570)} Concentration of lipids per unit dry weight of biota {biological entity specified elsewhere} Concentration of lipids per unit wet weight of biota {Asteroidea (ITIS: 156862: WoRMS 123080)} Concentration of lipids per unit wet weight of biota {Crangon crangon (ITIS: 97118: WoRMS 107552) [Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Crangon crangon (ITIS: 97118: WoRMS 107552)} Concentration of lipids per unit wet weight of biota {Gadus morhua (ITIS: 164712: WoRMS 126436) [Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Gadus morhua (ITIS: 164712: WoRMS 126436) [Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Limanda limanda (ITIS: 172881: WoRMS 127139) [Sex: female Size: length 200-249mm Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Liocarcinus (ITIS: 660431: WoRMS 106925)} Concentration of lipids per unit wet weight of biota {Mollusca (ITIS: 69458: WoRMS 51) [Subcomponent: flesh]} Concentration of lipids per unit wet weight of biota {Mytilus edulis (ITIS: 79454: WoRMS 140480) [Subcomponent: flesh]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Sex: female Subcomponent: gill]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Sex: female Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Sex: female Subcomponent: hepatopancreas]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Sex: male Subcomponent: gill]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Sex: male Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Sex: male Subcomponent: hepatopancreas]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Subcomponent: flesh]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Subcomponent: gill]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Mytilus galloprovincialis (ITIS: 79456: WoRMS 140481) [Subcomponent: hepatopancreas]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: female Subcomponent: blubber]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: female Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: female Subcomponent: heart]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: female Subcomponent: kidney]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: female Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: female Subcomponent: lung]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: female Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: male Subcomponent: blubber]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: male Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: male Subcomponent: heart]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: male Subcomponent: kidney]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: male Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: male Subcomponent: lung]} Concentration of lipids per unit wet weight of biota {Phocoena phocoena (ITIS: 180473: WoRMS 137117) [Sex: male Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: female Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: female Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: male Size: length 200-225mm Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: male Size: length 226-250mm Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: male Size: length 251-280mm Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: male Size: length 316-350mm Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: male Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Sex: male Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Size: length >280mm Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Platichthys flesus (ITIS: 172894: WoRMS 127141) [Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Pleuronectes platessa (ITIS: 172902: WoRMS 127143) [Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Pleuronectes platessa (ITIS: 172902: WoRMS 127143) [Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: female Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: female Subcomponent: heart]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: female Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: female Subcomponent: red muscle tissue]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: female Subcomponent: white muscle tissue]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: male Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: male Subcomponent: heart]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: male Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: male Subcomponent: red muscle tissue]} Concentration of lipids per unit wet weight of biota {Scophthalmus maximus (ITIS: 172748: WoRMS 127149) [Sex: male Subcomponent: white muscle tissue]} Concentration of lipids per unit wet weight of biota {Trachinidae (ITIS: 170989: WoRMS 125570)} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: blubber]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: heart]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: kidney]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: lung]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: spleen]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: blubber]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: gonads]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: heart]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: kidney]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: lung]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: male Subcomponent: spleen]} Concentration of lipids per unit wet weight of biota {Zoarces viviparus (ITIS: 165324: WoRMS 127123) [Subcomponent: liver]} Concentration of lipids per unit wet weight of biota {Zoarces viviparus (ITIS: 165324: WoRMS 127123) [Subcomponent: muscle tissue]} Concentration of lipids per unit wet weight of biota {biological entity specified elsewhere} Concentration of lithogenic material per unit dry weight of suspended particulate material Concentration of loosely-held total iron per unit dry weight of sediment by leaching with 1M ammonium acetate at pH 7 and atomic absorption spectroscopy Concentration of loosely-held total manganese per unit dry weight of sediment by leaching with 1M ammonium acetate at pH 7 and atomic absorption spectroscopy Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of sediment Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of suspended particulate material Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of suspended particulate material >0.4/0.45um by acid digestion of filter residue and inductively-coupled plasma atomic emission spectroscopy Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of suspended particulate material by centrifugation and inductively-coupled plasma atomic emission spectroscopy Concentration of magnesium {Mg CAS 7439-95-4} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of moderately-reducible total iron per unit dry weight of sediment by leaching with 0.25M hydroxylamine hydrochloride + 25% acetic acid of leached sample residue from stage 3 in Chester et al (1988) and atomic absorption spectroscopy Concentration of moderately-reducible total manganese per unit dry weight of sediment by leaching with 0.25M hydroxylamine hydrochloride + 25% acetic acid of leached sample residue from stage 3 in Chester et al (1988) and atomic absorption spectroscopy Concentration of nitrogen {N} per unit dry weight of biota {biological entity specified elsewhere} Concentration of nitrogen {N} per unit dry weight of sediment Concentration of nitrogen {N} per unit dry weight of sediment <63um Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment <2000um by wet sieving and elemental analysis Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment <63um by gas chromatography Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment <63um by wet sieving and elemental analysis Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment <63um by wet sieving and elemental analysis and differencing determinations on sample before and after 400C ignition Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment by acidification and elemental analysis Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment by elemental analysis and differencing determinations on sample before and after 400C ignition Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of sediment by gas chromatography Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of suspended particulate material >0.4/0.45um by filtration, acidification and elemental analysis Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of suspended particulate material >GF/C Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of suspended particulate material >GF/C by filtration, acidification and elemental analysis Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of suspended particulate material >GF/F by filtration, acidification and elemental analysis Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of suspended particulate material by centrifugation, acidification and elemental analysis Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of suspended particulate material by gas chromatography Concentration of organic carbon {organic_C CAS 7440-44-0} per unit dry weight of suspended particulate material by sediment trapping, acidification and elemental analysis Concentration of organic matter plus carbonates {TOM+CO3} {total organic matter} per unit dry weight of sediment by gravimetric determination of loss on ignition Concentration of organic matter {total organic matter} per unit dry weight of sediment <20um by gravimetric determination of loss on ignition Concentration of organic matter {total organic matter} per unit dry weight of sediment <63um by gravimetric determination of loss on ignition Concentration of organic matter {total organic matter} per unit dry weight of sediment by gravimetric determination of loss on ignition Concentration of organic matter- and sulfide-associated total iron per unit dry weight of sediment by leaching with H2O2 + 1M ammonium acetate at pH 2 of leached sample residue from stage 4 in Chester et al (1988) and atomic absorption spectroscopy Concentration of organic matter- and sulfide-associated total manganese per unit dry weight of sediment by leaching with H2O2 + 1M ammonium acetate at pH 2 of leached sample residue from stage 4 in Chester et al (1988) and atomic absorption spectroscopy Concentration of organic nitrogen {organic_N} per unit dry weight of sediment Concentration of organic nitrogen {organic_N} per unit dry weight of sediment <2000um by wet sieving and elemental analysis Concentration of organic nitrogen {organic_N} per unit dry weight of sediment <63um Concentration of organic nitrogen {organic_N} per unit dry weight of sediment <63um by wet sieving and elemental analysis Concentration of organic nitrogen {organic_N} per unit dry weight of sediment <63um by wet sieving and elemental analysis and differencing determinations on sample before and after 400C ignition Concentration of organic nitrogen {organic_N} per unit dry weight of sediment by elemental analysis Concentration of organic nitrogen {organic_N} per unit dry weight of sediment by elemental analysis and differencing determinations on sample before and after 400C ignition Concentration of organic nitrogen {organic_N} per unit dry weight of suspended particulate material >GF/C Concentration of organic nitrogen {organic_N} per unit dry weight of suspended particulate material by sediment trapping and elemental analysis Concentration of orthoclase feldspar per unit dry weight of sediment by X-ray diffraction Concentration of plagioclase feldspar per unit dry weight of sediment by X-ray diffraction Concentration of potassium {K CAS 7440-09-7} per unit dry weight of sediment Concentration of potassium {K CAS 7440-09-7} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of potassium {K CAS 7440-09-7} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of potassium {K CAS 7440-09-7} per unit dry weight of suspended particulate material Concentration of potassium {K CAS 7440-09-7} per unit dry weight of suspended particulate material >0.4/0.45um by acid digestion of filter residue and inductively-coupled plasma atomic emission spectroscopy Concentration of potassium {K CAS 7440-09-7} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of potassium {K CAS 7440-09-7} per unit dry weight of suspended particulate material by centrifugation and inductively-coupled plasma atomic emission spectroscopy Concentration of potassium {K CAS 7440-09-7} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of quartz per unit dry weight of sediment by X-ray diffraction Concentration of refractory organic carbon {black carbon} per unit dry weight of sediment by combustion at 375C and acidification and elemental analysis Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of sediment Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of sediment [amorphous phase] by oxalic acid extraction and inductively-coupled plasma atomic emission spectroscopy Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of suspended particulate material Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of suspended particulate material >0.4/0.45um Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of suspended particulate material >0.4/0.45um by filtration, acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of silicon {Si CAS 7440-21-3} per unit dry weight of suspended particulate material by centrifugation, acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of smectite per unit dry weight of sediment by X-ray diffraction Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of sediment Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of suspended particulate material >0.4/0.45um by acid digestion of filter residue and inductively-coupled plasma atomic emission spectroscopy Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of suspended particulate material by centrifugation, acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of sodium {Na CAS 7440-23-5} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of sulfur {sulphur S CAS 7704-34-9} per unit dry weight of biota {biological entity specified elsewhere} Concentration of sulfur {sulphur S CAS 7704-34-9} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of sulfur {sulphur S CAS 7704-34-9} per unit dry weight of sediment by compression into pellets and X-ray fluorescence Concentration of sulfur {sulphur S CAS 7704-34-9} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of sulfur {sulphur S CAS 7704-34-9} per unit dry weight of suspended particulate material Concentration of sulfur {sulphur S CAS 7704-34-9} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of titanium {Ti CAS 7440-32-6} per unit dry weight of sediment Concentration of titanium {Ti CAS 7440-32-6} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of titanium {Ti CAS 7440-32-6} per unit dry weight of sediment by compression into pellets and X-ray fluorescence Concentration of titanium {Ti CAS 7440-32-6} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of titanium {Ti CAS 7440-32-6} per unit dry weight of sediment by inductively-coupled plasma mass spectrometry Concentration of titanium {Ti CAS 7440-32-6} per unit dry weight of suspended particulate material Concentration of titanium {Ti CAS 7440-32-6} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of total carbon {total_C CAS 7440-44-0} per unit dry weight of sediment Concentration of total carbon {total_C CAS 7440-44-0} per unit dry weight of sediment <63um by wet sieving, no acidification and elemental analysis Concentration of total carbon {total_C CAS 7440-44-0} per unit dry weight of sediment by no acidification and elemental analysis Concentration of total carbon {total_C CAS 7440-44-0} per unit dry weight of suspended particulate material >0.4/0.45um by filtration, no acidification and elemental analysis Concentration of total carbon {total_C CAS 7440-44-0} per unit dry weight of suspended particulate material >GF/C by filtration, no acidification and elemental analysis Concentration of total carbon {total_C CAS 7440-44-0} per unit dry weight of suspended particulate material >GF/F by filtration, no acidification and elemental analysis Concentration of total carbon {total_C CAS 7440-44-0} per unit dry weight of suspended particulate material by sediment trapping, no acidification and elemental analysis Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment <2000um Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment <2um Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment <63um Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment <63um by wet sieving, acid digestion and atomic absorption spectroscopy Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment [amorphous phase] by oxalic acid extraction and inductively-coupled plasma atomic emission spectroscopy Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment by acid digestion of leached sample residue and atomic absorption spectroscopy and summation of staged leachate analyses Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment by acid digestion of leached sample residue and inductively-coupled plasma atomic emission spectroscopy and summation of staged leachate analyses Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of suspended particulate material Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of suspended particulate material >0.4/0.45um by acid leaching of filter residue and inductively-coupled plasma mass spectrometry Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment <2000um Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment <2um Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment <63um Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment <63um by wet sieving, acid digestion and atomic absorption spectroscopy Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment by acid digestion of leached sample residue and atomic absorption spectroscopy and summation of staged leachate analyses Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment by acid digestion of leached sample residue and inductively-coupled plasma atomic emission spectroscopy and summation of staged leachate analyses Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment by compression into pellets and X-ray fluorescence Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of suspended particulate material Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and atomic absorption spectroscopy Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of suspended particulate material by centrifugation and atomic absorption spectroscopy Concentration of total manganese {total_Mn CAS 7439-96-5} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of total nitrogen {total_N} per unit dry weight of suspended particulate material >0.4/0.45um by filtration and elemental analysis Concentration of total nitrogen {total_N} per unit dry weight of suspended particulate material >GF/C by filtration and elemental analysis Concentration of total nitrogen {total_N} per unit dry weight of suspended particulate material >GF/F by filtration and elemental analysis Concentration of total nitrogen {total_N} per unit dry weight of suspended particulate material by centrifugation and elemental analysis Concentration of total organic matter per unit dry weight of suspended particulate material Concentration of total phosphorus {total_P CAS 7723-14-0} per unit dry weight of sediment Concentration of total phosphorus {total_P CAS 7723-14-0} per unit dry weight of sediment by acid digestion and inductively-coupled plasma atomic emission spectroscopy Concentration of total phosphorus {total_P CAS 7723-14-0} per unit dry weight of sediment by flux-diluted fused bead preparation and X-ray fluorescence Concentration of total phosphorus {total_P CAS 7723-14-0} per unit dry weight of suspended particulate material Concentration of total phosphorus {total_P CAS 7723-14-0} per unit dry weight of suspended particulate material by sediment trapping and inductively-coupled plasma atomic emission spectroscopy Concentration of water {H2O CAS 7732-18-5} per unit dry weight of sediment by drying and gravimetry Concentration of water {H2O CAS 7732-18-5} per unit volume of wet sediment by computation from wet bulk density and assumed mineral grain and seawater densities Concentration of water {H2O CAS 7732-18-5} per unit volume of wet sediment by drying and gravimetry and volume computation from mass and mean density Concentration of water {H2O CAS 7732-18-5} per unit volume of wet sediment by non-contact resistivity and computation from wet bulk density Concentration of water {H2O CAS 7732-18-5} per unit wet weight of sediment by drying and gravimetry Concentration of water {H2O CAS 7732-18-5} {porosity} per unit volume of wet sediment by drying and gravimetry Concentration of water {H2O CAS 7732-18-5} {porosity} per unit volume of wet sediment by model prediction

roy-lowry commented 1 year ago

I think this may possibly be improved with no consequence for legacy data by changing concentratiom to proportion where the dimensions are unquestionably mass/mass. The only tripwire to watch out for is where the 'concentration' could be moles/mass rather than mass/mass in the legacy data.

There are times when I wish I'd been exposed to Jonathon Gregory's rigorous physics-based approach used in CF Standard Names in 2004 when I was formulating the P01 semantic model rather than in 2008 when I actually encountered it!

roy-lowry commented 1 year ago

As you may have gathered, a can of worms is being opened here.......

roy-lowry commented 1 year ago

The no-brainers that could be changed are things like 'Concentration of lipids per unit wet weight of biota {Tursiops truncatus (ITIS: 180426: WoRMS 137111) [Sex: female Subcomponent: muscle tissue]}' that could in no way be expressed as moles rather than mass.

The ones that make me cringe a bit are things like 'Concentration of total iron {total_Fe CAS 7439-89-6} per unit dry weight of sediment'. In all my experience of this measurement it would be reported in units of per cent or ppm pertaining to mass of iron per mass of sediment. within the rules of the game, some bright spark could report this measurement in moles/mass. However, I'm starting to think that if they did, it would be no worse than our having a mixture of concentrations in mass/volume and moles/volume and that having 'proportion' rather than 'concentration' might provide helpful guidance and provide damage limitation for past errors. It would at least lead towards a simple definition of 'concentration'!!!

roy-lowry commented 1 year ago

All sorts of thoughts are starting to fly around my head here...

If we have chlorophyll in ug/l and chlorophyll in ug/kg should one be a concentration and the other a proportion??? I tried to steer P01 in the direction of separating 'concentration per unit volume' and 'concentration per unit mass' to deal with this. situation but I'm now driving myself into a corner where 'amount per unit mass' should be a proportion for chlorophyll, but a concentration for metals or nutrients that are moles/kg????? It all comes down to P01 having more ambiguous terminology than CF.....

I'm thinking that creating a mapping between CF terminology, dimensionality and P01 terminology for concentrations/proportions/abundances might provide insight into the issue being discussed here which could provide a way forward that would improve interoperability between P01 and CF Standard Names. We can only fix things without making matters worse by having a clear understanding of the problem and producing a clear set of rules for current usage that don't screw up legacy......

dr-shorthair commented 1 year ago

Our documentary base mostly uses the term 'ratio' in the labels. It is often mass/mass, but sometimes concentration/concentration.

roy-lowry commented 1 year ago

Realised that defining proportion versus concentration in terms of dimension was a red herring based on my trying to remember thought processes of 20 years ago contaminated by working on CF Standard Names. So don't panic Gwen!

I've been trying to remember the history....

Concentration started out as a 'no-brainer' for amounts of a chemical substance per quantity of matrix

Then came GeoSeas and the need to cover things like classical grainsize where mass is a proxy for a count of occurrences of a physical property. So proportion was introduced as using concentration in the context of grainsize is semantically ridiculous. We then met radioactive substance data where the measurement is the number of decays per unit time and so 'activity' was introduced as this is significantly different to concentration (concentration for a given isotope activity depends on half life)

I see a ratio as the division of one concentration/proportion/activity by another.

My advice to @meganrwong to use 'proportion' for what are obviously chemical measurements was from my thinking along the wrong lines and totally incorrect!

Getting clear definitions of these terms would be useful as would increasing awareness of what CF are doing (e.g. my suggested mapping) so any future changes bring the vocabularies together rather than their drifting further apart.

dr-shorthair commented 1 year ago

(Shouldn't you be in bed @roy-lowry ?)

meganrwong commented 1 year ago

Here is a slightly different example where some judgement was required - just to point out the challenge of applying a 'hard and fast' rule re when 'concentration' would be used.

  1. Titratable Actual Acidity (TAAD-B)
  2. Total Sulfidic Acidity (TSAD-B)
  3. Residual Quick Neutralising Capacity (RQNCD-B) Reporting of Results- Report TAAD-B, TSAD-B and RQNCD-B separately as molc/m3 on a moist soil basis.

Although all are reported in molc/m3, to me it would not read right to have 'concentration' of for no.3. I think it would just be 'Residual quick neutralizing capacity' (S29) 'on a moist soil basis' (S03 - sample preparation)

roy-lowry commented 1 year ago

@meganrwong Now you are providing the reason why there are so many S06 entries ;-) Your last example is very similar to the parameter called 'total alkalinity' in oceanography, which is a measure of a water sample's ability to neutralise acid. This has its own S06 entry (S0600283). At one time this was reported in units of microequivalents/litre, but now concentration units (umol/kg) are used. However, as you say, including concentration it a description of alkalinity would not make good reading. It's likely (inevitable?) that you will have measurements in your data systems that have never been encountered by the P01 developers and so further extension of the model element vocabularies may be required. The important thing is that everybody has the same understanding of the meanings of the existing entries.