Dear Martin Thanks for spotting this. I agree with your solution.
Best wishes Jonathan ----- Forwarded message from Martin Juckes - UKRI STFC <[email protected]> ----- > Date: Wed, 5 Sep 2018 09:05:33 +0000 > From: Martin Juckes - UKRI STFC <[email protected]> > To: "CF-metadata ([email protected])" <[email protected]> > Subject: [CF-metadata] Ocean content tendencies due to sedimentation -- sign > ambiguity in CMIP usage > > Hello All, > > > there is a problem with the way 4 CMIP6 variables use standard names defined > for tendencies due to sedimentation. Sedimentation in CF means sedimentation > in water, so sedimentation of a substance always leads to a negative tendency > of the amount of that substance suspended in the ocean. In CMIP6, following > CMIP5 usage, standard names for tendencies of amounts of substances in the > ocean have been used for variables with long names which imply that they are > negative tendencies, i.e. loss rates. E.g. > > - frfe "Iron Loss to Sediments" > tendency_of_ocean_mole_content_of_iron_due_to_sedimentation. > > > We recently dealt with a similar issue for atmospheric deposition rates: > http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2018/020204.html and the > solution (http://cfeditor.ceda.ac.uk/proposal/3225 ) was to introduce new > standard names of the form "minus_tendency_...". > > > For the four ocean variables (frfe, frn, fric, froc) I propose 4 new standard > names: > > minus_tendency_of_ocean_mole_content_of_inorganic_carbon_due_to_sedimentation > minus_tendency_of_ocean_mole_content_of_organic_carbon_due_to_sedimentation > minus_tendency_of_ocean_mole_content_of_iron_due_to_sedimentation (as in > CMIP5) > minus_tendency_of_ocean_mole_content_of_elemental_nitrogen_due_to_denitrification_and_sedimentation > > > These all correspond to minus one times the quantity defined by existing > standard names. > > > More details about the 4 CMIP variables are given on the Data Request github > site: > https://github.com/cmip6dr/CMIP6_DataRequest_VariableDefinitions/issues/344 > > > regards, > > Martin > > <http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2018/020204.html> > _______________________________________________ > 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
