Dear Bruno, Jonathan and Roy, Thanks all for your comments. As far as the standard name is concerned, I think we are agreed on aerosol_particle_diameter to describe the particle sizes. This would have an SI unit of m.
This name is accepted for inclusion in the standard name table. ------ Alison Pamment Tel: +44 1235 778065 NCAS/British Atmospheric Data Centre Fax: +44 1235 446314 Rutherford Appleton Laboratory Email: [email protected] Chilton, Didcot, OX11 0QX, U.K. > -----Original Message----- > From: [email protected] [mailto:cf-metadata- > [email protected]] On Behalf Of Jonathan Gregory > Sent: 27 November 2010 14:21 > To: [email protected] > Subject: [CF-metadata] Correct name for aerosol size > distributionexpressedin numbers ? > > Dear Bruno > > Either the geophysical quantity or the bin index could be the > coordinate > variable, with the other one being an auxiliary coordinate variable. > That > is an arbitrary choice. If you don't need the bin index, you don't have > to > have such a variable at all. Both > > SPP200_bins = 30 ; > int SPP200_bins(SPP200_bins) ; > float SPP200_median_particle_diameter(SPP200_bins) ; > float mic_conctab_SPP200_sync_1(time, SPP200_bins) ; > mic_conctab_SPP200_sync_1:coordinates = > "SPP200_median_particle_diameter" ; > > and > > SPP200_median_particle_diameter = 30; > int SPP200_bins(SPP200_median_particle_diameter) ; > float > SPP200_median_particle_diameter(SPP200_median_particle_diameter); > float mic_conctab_SPP200_sync_1(time, > SPP200_median_particle_diameter) ; > mic_conctab_SPP200_sync_1:coordinates = "SPP200_bins"; > > would be OK. time does not need to be named in the coordinates > attribute, > since it is a coordinate variable. (You can list it there if you like, > but > it is not usual.) > > > One last question I couldn't solve : should > > "bounds="SPP200_bin_bounds" be a attribute of the simple index > variable > > ("SPP200_bins") or of the the geophysices coordinate > > ("SPP200_median_particle_diameter") ? > > The latter. It specifies bounds for the diameter values for the bins. > > Best wishes > > Jonathan > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- Scanned by iCritical. _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
