Dear Alison, Thank you so much for your digging through the remaining ISMIP6 standard names!
I am OK with everything below, including using land_ice_basal_drag With kind regards Sophie > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 5 Apr 2018 10:26:20 +0000 > From: Alison Pamment - UKRI STFC <alison.pamm...@stfc.ac.uk> > To: "'Nowicki, Sophie (GSFC-6150)'" <sophie.nowi...@nasa.gov>, > "cf-metadata@cgd.ucar.edu" <cf-metadata@cgd.ucar.edu> > Cc: "h.goel...@uu.nl" <h.goel...@uu.nl> > Subject: Re: [CF-metadata] standard names for ISMIP6: checking status > of previous proposed names > Message-ID: <cc97c864866d4db38bb9b993926bb...@stfc.ac.uk> > Content-Type: text/plain; charset="iso-8859-1" > > Dear Sophie, > > Thanks for contacting me about the remaining ISMIP6 names. I recall that much > of the discussion of these names had centred around the definitions, rather > than the names themselves. I've now looked back through our various > conversations from 2016 and 2017 and I think that most of the outstanding > points were resolved in your posting > http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059199.html - sorry I > didn't pick up on that at the time. Below is a summary of what I think is the > latest status of the names (the numbers refer to your original list of > proposals). > > 16. land_ice_mass (kg) > ' "Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and > also includes ice-shelves. The horizontal domain over which the quantity is > calculated is described by the associated coordinate variables and coordinate > bounds or by a coordinate variable or scalar coordinate variable with the > standard name of "region" supplied according to section 6.1.1 of the CF > conventions.' > > As far as I can see, this one was resolved by adding the sentence about the > horizontal domain to the definition. I've now marked this name as accepted > and will include it in the next update of the standard name table on April > 16th. > > 17. land_ice_mass_not_displacing_sea_water (kg) > > There was quite a lot of discussion about which elements of land ice are > included/excluded in this name and you amended the definition to: > ' "Land ice not displacing sea water" means land ice that would not alter sea > level if the ice were converted to water and added to the ocean. It excludes > ice shelves (and any other sort of floating ice) and it excludes a fraction > of grounded ice-sheet mass equivalent to the mass of any sea water it > displaces. It includes glaciers and a portion of grounded ice-sheet mass > exceeding the mass of any sea water displaced. The quantity with standard > name land_ice_mass_not_displacing_sea_water is the total mass integrated over > an area of land ice. The geographical extent of the ice over which the mass > was calculated should be described by providing bounds on the horizontal > coordinate variable or scalar with the standard name of "region" supplied > according to section 6.1.1 of the CF convention.' > > As far as I can see, this answered the points that had been raised by > Jonathan and Karl and no further comments have been received. I've now added > your definition and accepted the name. It will be added in the next update. > > 23. magnitude_of_land_ice_basal_drag (Pa) > 'The magnitude of basal drag at land ice base.' > > There was a question about the definition and I see that in > http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059199.html you asked > to change this one to > land_ice_basal_drag (Pa) > ' "Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and > also includes ice-shelves. Basal drag is a resistive stress opposing ice flow > at the ice bedrock boundary.' > > I think the later version of the name, units and definition are okay. Are you > happy for this one to go into the standard name table as land_ice_basal_drag? > If so, then I think this one can be accepted and added at the next update. > > 24. tendency_of_land_ice_mass_due_to_surface_mass_balance (kg s-1) > ' "Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and > also includes ice-shelves. The phrase "tendency_of_X" means derivative of X > with respect to time. The surface called "surface" means the lower boundary > of the atmosphere. The specification of a physical process by the phrase > "due_to_" process means that the quantity named is a single term in a sum of > terms which together compose the general quantity named by omitting the > phrase. "Mass balance" means the net rate at which ice is added. A negative > value means loss of ice. The tendency in ice mass due to the surface mass > balance is the spatial integral of the quantity with standard name > land_ice_surface_specific_mass_balance_flux. The horizontal domain over which > the quantity is described by the associated coordinate variables and > coordinate bounds or by a string valued coordinate variable or scalar > coordinate variable with a standard name of "region".' > > In the discussion I asked some questions about whether it was correct to say > 'surface' in this name and Jonathan replied that it is. We also added the > sentence to the definition regarding the horizontal domain. This name is > accepted and will be added to the standard name table in the next update. > > While checking on the ISMIP6 names I found two more that were still marked as > being under discussion, although in fact they seem to have been agreed in > 2016: http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2016/059064.html. > (The only question was whether to include 'flux' in the specific mass balance > names which are referred to in the definitions. We did decide to include it, > so the question is resolved). I've now also marked these two as accepted and > they will be included in the next update to the standard name table. > > 25. tendency_of_land_ice_mass_due_to_basal_mass_balance (kg s-1) > ' "Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and > also includes ice-shelves. The phrase "tendency_of_X" means derivative of X > with respect to time. The specification of a physical process by the phrase > "due_to_" process means that the quantity named is a single term in a sum of > terms which together compose the general quantity named by omitting the > phrase. Mass balance means the net rate at which ice is accumulated. A > negative value means loss of ice. The tendency in ice mass due to the basal > mass balance is the spatial integral of the quantity with standard name > land_ice_basal_specific_mass_balance_flux. The geographical extent of the ice > over which the mass is calculated is defined by the horizontal coordinates > and any associated coordinate bounds or by a string valued auxiliary > coordinate variable with a standard name of "region".' > > 26. tendency_of_land_ice_mass_due_to_calving (kg s-1) > ' "Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and > also includes ice-shelves. "tendency_of_X" means derivative of X with respect > to time. The specification of a physical process by the phrase "due_to_" > process means that the quantity named is a single term in a sum of terms > which together compose the general quantity named by omitting the phrase. The > tendency in ice mass due to calving is the spatial integral of the quantity > named land_ice_specific_mass_flux_due_to_calving. The geographical extent > over which the quantity is calculated is defined by the horizontal > coordinates and any associated coordinate bounds or by a string valued > auxiliary coordinate variable with a standard name of "region". > > Apologies for the delay in finalizing these last few names. If you can > confirm that the basal_drag term is okay then I think all the ISMIP6 names > will be complete. > > Best wishes, > Alison > > ------ > Alison Pamment Tel: +44 1235 778065 > NCAS/Centre for Environmental Data Archival Email: > alison.pamm...@stfc.ac.uk > STFC Rutherford Appleton Laboratory > R25, 2.22 > Harwell Oxford, Didcot, OX11 0QX, U.K. > > From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of > Nowicki, Sophie (GSFC-6150) > Sent: 20 March 2018 15:47 > To: cf-metadata@cgd.ucar.edu > Cc: h.goel...@uu.nl > Subject: [CF-metadata] standard names for ISMIP6: checking status of previous > proposed names > > Dear Alison and CF community > > I just wanted to follow up on the last remaining 4 proposed CF names (made in > Oct 3, 2016) for the Ice Sheet Model Intercomparison Project for CMIP6. > > These were: > magnitude_of_land_ice_basal_drag, see?http://cfeditor.ceda.ac.uk/proposal/1344 > tendency_of_land_ice_mass_due_to_surface_mass_balance, > see?http://cfeditor.ceda.ac.uk/proposal/1345 > land_ice_mass, see?http://cfeditor.ceda.ac.uk/proposal/1155 > land_ice_mass_not_displacing_sea_water,?http://cfeditor.ceda.ac.uk/proposal/1156 > > and I can't remember (or find the email thread) if there was still anything > that had to be resolved. > > Many thanks for all your help, > > Sophie > _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
