Dear CF-Meta Mailinglist,
I would like to advertise my long question from two weeks ago. Maybe
there were no replies because it was to long :-) . Excuse me if I should
be wrong with that assumption. The basic questions are:
What do these two standard names mean?
(a) mass_concentration_of_ammonium_dry_aerosol_particles_in_air
(b)
mass_concentration_of_dry_aerosol_particles_expressed_as_ammonium_in_air
What should be the standard name for the mass concentration of
atmospheric particulate chloride/ammonium/nitrate/sulfate/...? Should it
be like (a), like (b) or something else (e.g.
mass_concentrations_of_particulate_ammonium_in_air)?
Please find details on the question here:
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059573.html
Regards,
Daniel
On 27.06.2017 14:43, Daniel Neumann wrote:
> Dear CF-Mailinglist,
>
> in a recent proposal (link given below*), Alison and I discussed about
> the naming conventions for the mass of specific aerosol particle
> components. There seems to be clarification necessary in the
> descriptions and/or names.
> [* recent proposal with discussion:
> http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059522.html,
> look for "10.
> mass_concentration_of_chloride_dry_aerosol_particles_in_air (kg m-3)"]
>
>
> Currently, there exist standard names like
> > mass_concentration_of_ammonium_dry_aerosol_particles_in_air
> > mass_concentration_of_dust_dry_aerosol_particles_in_air
> > general form: mass_concentration_of_X_dry_aerosol_particles_in_air
> which describe mass concentration of aerosol particles that contain
> species X. Thus, this standard name describes not only the mass of
> species X but also the mass of other species that are associated with
> X on particles. In the past, I thought it would describe the mass of
> species X only. We think that there is a need for clarifying this in
> the description of these standard names.
>
>
> When we now want to quantify the mass of particulate X only (e.g. mass
> of particulate chloride, mass of particulate ammonium), we could use
> the standard name
> > mass_concentration_of_dry_aerosol_particles_expressed_as_X_in_air
>
> However, I see two problems with respect to this naming convention.
> First, we get a not-nice name if we want to express the mass
> concentrations of particulate ammonium in terms of nitrogen. We needed
> a standard name like
> >
> mass_concentration_of_dry_aerosol_particles_expressed_as_ammonium_expressed_as_nitrogen_in_air
> which contains 'expressed' twice.
>
> Second (but that is my personal feeling only), I use the
> "X_expressed_as_Y" formulation only, when there is some relation from
> Y to X. Or in other words: when Y is a reasonable measure for X.
> > ...organic_matter_..._expressed_as_carbon...
> > ...nox_expressed_as_nitrogen...
> > ...phytoplankton_expressed_as_phosphorus...
>
> Therefore,
> "mass_concentration_of_dry_aerosol_particles_expressed_as_X_in_air" is
> not a good choice for a standard name describing the mass of
> particulate X in my opinion.
>
>
> An alternative would be to introduce a standard name like
> > mass_concentrations_of_particulate_X_in_air
> > mass_concentrations_of_particulate_ammonium_in_air
> > mass_concentrations_of_particulate_chloride_in_air
>
>
> What is your opinion on this topic?
>
>
> Best Regards,
> Daniel
>
--
Daniel Neumann
Leibniz Institute for Baltic Sea Research Warnemuende
Physical Oceanography and Instrumentation
Seestrasse 15
18119 Rostock
Germany
phone: +49-381-5197-287
fax: +49-381-5197-114 or 440
e-mail: daniel.neumann at io-warnemuende.de
Received on Tue Jul 11 2017 - 13:05:13 BST
