Dear Sebastien There is an existing standard name of ocean_integral_wrt_depth_of_sea_water_temperature and the one you propose has the same pattern, so it would seem all right to me, and appropriate for your purpose. Otherwise you could set a very large lower depth boundary with the understanding that integrating below the sea floor added nothing, but that's a bit ugly.
Best wishes Jonathan ----- Forwarded message from Sebastien Villaume <[email protected]> ----- > Date: Wed, 11 Apr 2018 13:57:48 +0000 > From: Sebastien Villaume <[email protected]> > To: [email protected] > Subject: [CF-metadata] use of > integral_wrt_depth_of_sea_water_practical_salinity > X-Mailer: Zimbra 8.6.0_GA_1200 (ZimbraWebClient - FF57 (Linux)/8.6.0_GA_1200) > > Dear list, > > In 2016/2017, a list of new standard names for NEMO output has been proposed > and accepted : > http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2016/058964.html > > from that initial list of standard names and after many iterations, one of > the accepted standard name was: > > standard name: integral_wrt_depth_of_sea_water_practical_salinity > units: m > > But the initial list of proposed standard names had actually 2 entries for > this standard name: > > - one entry which is the one that eventually made it to the list (the > standard name above) > - a second entry for the case where the depth is the total depth, from > surface to sea floor: ocean_integral_wrt_depth_of_sea_water_practical_salinity > > During the discussion: > - Alison argued that the 2 entries were actually identical, the second one > being simply a special case of the first one, i.e. when the depth corresponds > to the total depth. She proposed later on to simply dropped the second entry. > - Antonio Cofino argued that in this case the reference to Axis and to > bounds should be removed from the description because in the case of the > total depth, the bounds are not a constant (but function of lat and lon) > > In the published description the reference to an axis and to bounds is still > there. > > > > My immediate problem is that I want to produce a parameter that is the > integral wrt the whole depth of the salinity and I don't know how to do this. > > for a fixed depth of 500m for instance, the metadata for the parameter would > be: > > float salinity500(t, y, x) ; > salinity500:standard_name = > "integral_wrt_depth_of_sea_water_practical_salinity" ; > salinity500:units = "m" ; > salinity500:coordinates = "time dpt500 latitude longitude" ; > float dpt500 ; > dpt500:standard_name = "depth_below_geoid" ; > dpt500:units = "m" ; > dpt500:axis = "Z" ; > dpt500:positive = "down" ; > dpt500:bounds = dpt500_bnds ; > float dpt500_bnds(bnds) ; > > and in the dpt500_bnds array, I have : [0., 500.] > > for the total depth, I can't use the same mechanism, because the second value > of the bounds is not a constant, it is a function of lat and lon: [0., > f(lat,lon)] > > > How can I solve this? > > Is it possible to reconsider the standard name > ocean_integral_wrt_depth_of_sea_water_practical_salinity (or a variation of > it)? > Another approach could be to keep the existing standard name, add a new > standard name that represents the total water column and use it as an > auxiliary coordinate. > > thanks, > ____________________________________ > > Dr. Sébastien Villaume > > M.A.R.S. Analyst > ECMWF Data Governance facilitator > > ECMWF > Shinfield Park, > Reading RG2 9AX, UK > +44 (0)118 949 9301 > +44 (0)7825 521592 > [email protected] > ____________________________________ > _______________________________________________ > 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
