Dear Heinke > atmosphere_number_content_of_X (new physical parameter) > > This was Jonathan's proposal. > Christiane talked about _in_air. But I think that does not fit. > For example _in_cloud is not in_air. Is that right, Christiane?
I think in_cloud is in_air, and I suggested to Christiane using cell_methods to indicate the cloud portion of the grid box, if that is required. I think "atmosphere" indicates that the content is a property of the whole atmosphere, whereas in_air means a local property of the medium. I know this distinction is not strictly necessary; we have always made it like that because it is more like the terms that people normally use e.g. density of air, but energy content of atmosphere. > _in_air_of_atmosphere_layer Sorry, I don't understand what this construction means e.g. > mass_fraction_of_ozone_in_air_of_atmosphere_layer What is the difference between that and mass_fraction_of_ozone_in_air? > We changed the units to micrograms/m3 ... Any units which are dimensionally equivalent can be specified. CF doesn't say whether it should be um m-3 or kg m-3. Either could be stated in the standard name table as the "canonical units" for the quantity, but it is probably best to be consistent. > Christiane said: > There is not exact definition for Aitken, Coarse mode particles, hence I > would suggest to avoid these names in CF. > > We agree that there isn't clear definition for these aerosol classes. > Alternative > could be to give the exact distribution properties in the CF name, for > example coarse > mode can be described as particles with number median radius greater > than 0.5 micrometers. > > Could we use a scalar coordinate variable for the radius? Yes, we could. But for other size classes, Christiane did use names e.g. pm10. > atmosphere_aerosol_refractive_index_imaginary_part etc. Could we say imaginary_part_of_atmosphere_aerosol_refractive_index or atmosphere_aerosol_imaginary_refractive_index? ? I think it would be better to have the "imaginary" before the "refractive index" somehow. This is a bit like eastward and northward components. (The same for the real part.) Cheers Jonathan _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
