Re: [CF-metadata] CMIP6 data request: Precipitation of solid phase water

2018-04-24 Thread Alison Pamment - UKRI STFC
Dear Martin, All, Thank you for this proposal and the discussion of a standard name to describe all types of solid precipitation. I have reviewed the thread and it seems agreement has been reached on solid_precipitation_flux (kg m-2 s-1) 'In accordance with common usage in geophysical discipline

Re: [CF-metadata] proposed new standard name for storm surge residual

2018-04-24 Thread Jonathan Gregory
Dear Andy > - I'm only going to do this for sea water levels, so from my point of view > using the term "sea" is fine; I'm just aware that what comes below could be > applied in other water bodies Yes. However, we make our job simpler (as a principle in CF) by doing only what we need to for the

Re: [CF-metadata] Fwd: Re: Fwd: Re: proposed new standard name for storm surge residual

2018-04-24 Thread Saulter, Andrew
Dear Jonathon, Probably useful if I'm specific about how the variables I want to use with these names will be applied/derived. - I'm only going to do this for sea water levels, so from my point of view using the term "sea" is fine; I'm just aware that what comes below could be applied in othe

[CF-metadata] PMIP (including 1 or more that originated in C4MIP) Standard Names: Carbon and Nitrogen terms

2018-04-24 Thread Jonathan Gregory
Dear Martin Tricky! I'm not sure that is better. Yes, I think you've correctly described why I'm uncomfortable. Could you give other examples of this expanded use of expressed_as, for comparison? What do we actually want to mean with these new GPP names? Is it just the mass of 13C atoms in the GP

[CF-metadata] Fwd: Re: Fwd: Re: proposed new standard name for storm surge residual

2018-04-24 Thread Jonathan Gregory
Dear Andy > "elevation_of_sea_surface_due_to_X" sounds most appropriate. OK. Since we already have water_surface_height_above_reference_datum water_surface_reference_datum_altitude in the table, I agree that water_surface is OK to use. In general in standard names we have made the word "sea"

Re: [CF-metadata] Fwd: Re: proposed new standard name for storm surge residual

2018-04-24 Thread Saulter, Andrew
Thanks Jonathon, Of the below "elevation_of_sea_surface_due_to_X" sounds most appropriate. But sticking with the previously suggested sea_surface_elevation theme and noting that tides, surges and waves can also occur in large inland water bodies such as the Great Lakes, how about using the more

Re: [CF-metadata] PMIP (including 1 or more that originated in C4MIP) Standard Names: Carbon and Nitrogen terms

2018-04-24 Thread Martin Juckes - UKRI STFC
Hello Jonathan, I think the usage of "expressed_as" has crept into new areas, while remaining consistent with the definition as given in the standard names. The current help text says "It means that the quantity indicated by the standard name is calculated solely with respect to the B contain

Re: [CF-metadata] PMIP (including 1 or more that originated in C4MIP) Standard Names: Carbon and Nitrogen terms

2018-04-24 Thread Jonathan Gregory
Dear Martin Yes, I see what you mean, but nonetheless it seems odd to me. Is it normal to express GPP as mass of 13C? For example, this would be like expressing anthropogenic CO2 emissions as 13C. If 13C is about 1% of all the C in fossil fuels (I don't know what % it is - this is just an example)

Re: [CF-metadata] PMIP (including 1 or more that originated in C4MIP) Standard Names: Carbon and Nitrogen terms

2018-04-24 Thread Martin Juckes - UKRI STFC
Dear Jonathan, It is a logical extension, I believe, in the existing usage in terms such as "gross_primary_productivity_of_biomass_expressed_as_carbon", for which the help text states: "The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of

[CF-metadata] Fwd: Re: proposed new standard name for storm surge residual

2018-04-24 Thread Jonathan Gregory
Dear Andrew and John I hadn't noticed that sea_surface_elevation is already in use as an alias. That's a pity, but maybe it would be confusing anyway, given John's comment. I think that what Andrew needs is terms that say how much higher the sea surface is because of influence X relative to how h

[CF-metadata] PMIP (including 1 or more that originated in C4MIP) Standard Names: Carbon and Nitrogen terms

2018-04-24 Thread Jonathan Gregory
Dear Martin Thanks for the new proposals. > gross_primary_productivity_of_biomass_expressed_as_13C > gross_primary_productivity_of_biomass_expressed_as_14C These don't seem quite right to me. They imply you can express the *entire* GPP as kg of 13C or 14C. Does it means the mass of 13C or 14C in

Re: [CF-metadata] proposed new standard name for storm surge residual

2018-04-24 Thread Saulter, Andrew
John, I see where you are with that, but my understanding from Jonathon Gregory's email earlier is that the 'due_to' part of the phrasing identifies a component process that contributes to an overall quantity. In the case below 'due_to_storm_surge' is a contribution to 'sea_surface_elevation' a