Steve,
Thank you for your comment.
I am not sure whether I got the comment correct: It does not become
clear which mass per which volume is described by
"mass_concentration_of_X_in_dry_aerosol_in_air"? You mean ambiguity
whether it is either 'mass of X' in the volume of 'dry_aerosol_in_air'
of 'only mass of X, which is in dry aerosol' in the volume of 'air'?
With respect to the guide you linked: it does not become what 'B'
actually is? Thus, I should re-think the order and the connecting
prepositions?
Or do want to point out that the terms "atmosphere_mass_content_*" and
"mass_concentration_*_in_air" might be problematic in general?
Daniel
On 14.08.2017 16:37, Steven Emmerson wrote:
Greetings,
Just a reminder from an obsessive pedant who favors standards.
The terms "mass concentration" and "mass content", while they might be
well-understood in some scientific disciplines, aren't universally
understood in all scientific disciplines. FWIW, I recommend looking at
what Canada and the US have done regarding standard names for physical
quantities. Section 8.6.2 of
<https://www.nist.gov/physical-measurement-laboratory/nist-guide-si-chapter-8>
is a good starting point.
Regards,
Steve Emmerson
On Mon, Aug 14, 2017 at 3:48 AM, Daniel Neumann
<[email protected]
<mailto:[email protected]>> wrote:
Just a brief reminder.
On 24.07.2017 16 <tel:24.07.2017%2016>:59, Daniel Neumann wrote:
Dear CF-Mailinglist,
I suggest to rename all standard names (rename = create the
new names and make the old names aliases to the new ones)
atmospheric_mass_content_of_X_dry_aerosol
to
atmospheric_mass_content_of_X_in_dry_aerosol
and
mass_concentration_of_X_dry_aerosol_in_air
to
mass_concentration_of_X_in_dry_aerosol_in_air
and
atmosphere_mass_content_of_sulfate_dry_aerosol_particles_expressed_as_sulfur
to
atmosphere_mass_content_of_sulfate_in_dry_aerosol_particles_expressed_as_sulfur
I am not aware of any reasonable exceptions for X.
Further I would like to suggest to add
atmospheric_mass_content_of_X_in_dry_aerosol
mass_concentration_of_X_in_dry_aerosol_in_air
for chloride and sodium (units and descriptions according to
the existing other standard names of this type).
Reasons:
(a) As stated here
(http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059588.html
<http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059588.html>)
and here
(http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059554.html
<http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059554.html>),
the standard name mass_concentration_of_X_dry_aerosol
describes the total dry mass of all aerosol particles that
contain traces of X. There is currently no term to describe
the mass concentration of particulate X.
(b) As stated here
(http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059588.html
<http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2017/059588.html>)
there is no practical application or
mass_concentration_of_X_dry_aerosol. However, for the CMIP5
experiments the standard name
atmospheric_mass_content_of_X_dry_aerosol is used to describe
the mass content of particulate X (sulfate, nitrate, ammonium)
in the atmosphere. See standard_output.pdf on
http://cmip-pcmdi.llnl.gov/cmip5/output_req.html
<http://cmip-pcmdi.llnl.gov/cmip5/output_req.html> for
details:
http://cmip-pcmdi.llnl.gov/cmip5/docs/standard_output.pdf
<http://cmip-pcmdi.llnl.gov/cmip5/docs/standard_output.pdf> .
There are probably more situation, in which
mass_concentration_of_X_dry_aerosol and
atmospheric_mass_content_of_X_dry_aerosol were wrongly used.
At least I would have used it wrongly :-) .
In order to (a) have valid standard names for the mass
concentration (and mass content) of particulate X and (b) be
backward compatible with respect to the current usage of
existing standard names, I suggest to rename the old variable
names (create new one + make the old ones aliases to the new
ones) instead of just creating new ones (without alias-ing).
Regards,
Daniel
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Daniel Neumann
Leibniz Institute for Baltic Sea Research Warnemuende
Physical Oceanography and Instrumentation
Seestrasse 15
18119 Rostock
Germany
phone: +49-381-5197-287 <tel:%2B49-381-5197-287>
fax: +49-381-5197-114 <tel:%2B49-381-5197-114> or 440
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<mailto:[email protected]>
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--
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: [email protected]
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