Dear Christiane,
following our exchange of emails last week, I would like to bring the
aerosol and chemistry thread back to the list. An update of the
standard name table is due to take place on Tuesday 13th November, so
during the next few days I would like to finalise the list of names to
be included.
Over the summer there was quite a lengthy discussion of the idea of
introducing a systematic method for constructing chemical names from a
number of constituent components (Roy's "semantic model" - see
http://www.cgd.ucar.edu/pipermail/cf-metadata/2007/001774.html). There
seems to be a good deal of support for this idea. However, as it will
inevitably take some time to agree how to go about this and put
something in place, I suggest that for the present we could go ahead and
include many of the names that have been waiting a long time to go into
the table. This does not, of course, preclude the introduction of a
more hierarchical approach to constructing standard names in the future.
Looking at the discussion copied to your HTAP wiki page,
http://wiki.esipfed.org/index.php/Talk:CF_Standard_Names_-_CF_Standard_N
ames_-_Submitted_Atmospheric_Chemistry_and_Aerosol_Terms
there is a question concerning the sulphate/nitrate names, particularly
with regard to optical thickness. For sulphate/nitrogen_oxide names in
general it seems there is a need to specify exactly which species are
included in each model. We would need to think about how to do it in CF
because at the moment there isn't an obvious place to record such
information. I propose that for the moment we should not add these
particular names to the table. A similar question of how to define
group chemical names has also been raised, e.g. in Martin Schultz's post
http://www.cgd.ucar.edu/pipermail/cf-metadata/2007/001811.html. The
general feeling seems to be that an ontological approach is the way to
deal with this problem.
There is also the question raised by Philip
(
http://www.cgd.ucar.edu/pipermail/cf-metadata/2007/001788.html)
regarding how gross production/destruction are defined. Do we have a
clear enough definition of what these should mean in CF?
Taking into account as far as possible all the previous discussions I
suggest that the following names could be included in the standard name
table on November 13th.
Volume mixing ratios:
mole_fraction_of_gaseous_elemental_mercury_in_air
mole_fraction_of_gasesous_divalent_mercury_in_air
(Define divalent as meaning all compounds where Hg has two binding sites
to (an)other ion(s) in a salt or an(other) atom(s) in a molecule).
Tendency of atmospheric mass content due to dry deposition:
tendency_of_atmosphere_mass_content_of_ozone_due_to_dry_deposition OK
tendency_of_atmosphere_mass_content_of_nitric_acid_due_to_dry_depositon
OK
tendency_of_atmosphere_mass_content_of_nitrogen_dioxide_due_to_dry_depos
ition
tendency_of_atmosphere_mass_content_of_ammonia_due_to_dry_deposition
tendency_of_atmosphere_mass_content_of_ammonium_due_to_dry_deposition
tendency_of_atmosphere_mass_content_of_dimethyl_sulfide_due_to_dry_depos
ition
tendency_of_atmosphere_mass_content_of_sulfur_dioxide_due_to_dry_deposit
ion
tendency_of_atmosphere_mass_content_of_black_carbon_dry_aerosol_due_to_d
ry_deposition
tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_ae
ro
sol_due_to_dry_deposition
tendency_of_atmosphere_mass_content_of_secondary_particulate_organic_mat
ter_dry_aerosol_due_to_dry_deposition
tendency_of_atmosphere_mass_content_of_primary_particulate_organic_matte
r_dry_aerosol_due_to_dry_deposition
tendency_of_atmosphere_mass_content_of_seasalt_dry_aerosol_due_to_dry_de
position
tendency_of_atmosphere_mass_content_of_dust_dry_aerosol_due_to_dry_depos
ition
tendency_of_atmosphere_mass_content_of_hexachlorobiphenyl_due_to_dry_dep
osition
tendency_of_atmosphere_mass_content_of_alpha_hexachlorocyclohexane_due_t
o_dry_deposition
tendency_of_atmosphere_mass_content_of_gasesous_elemental_mercury_due_to
_dry_deposition
tendency_of_atmosphere_mass_content_of_gaseous_divalent_mercury_due_to_d
ry_deposition
tendency_of_atmosphere_mass_content_of_mercury_dry_aerosol_due_to_dry_de
position
Tendency of atmospheric mass content due to dry deposition into stomata:
tendency_of_atmosphere_mass_content_of_ozone_due_to_dry_deposition_into_
stomata
Tendency of atmospheric mass content due to wet deposition:
tendency_of_atmosphere_mass_content_of_nitric_acid_due_to_wet_depositon
tendency_of_atmosphere_mass_content_of_ammonia_due_to_wet_deposition
tendency_of_atmosphere_mass_content_of_ammonium_due_to_wet_deposition
tendency_of_atmosphere_mass_content_of_dimethyl_sulfide_due_to_wet_depos
ition
tendency_of_atmosphere_mass_content_of_sulfur_dioxide_due_to_wet_deposit
ion
tendency_of_atmosphere_mass_content_of_black_carbon_dry_aerosol_due_to_w
et_deposition
tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_ae
rosol_due_to_wet_deposition
tendency_of_atmosphere_mass_content_of_secondary_particulate_organic_mat
ter_dry_aerosol_due_to_wet_deposition
tendency_of_atmosphere_mass_content_of_primary_particulate_organic_matte
r_dry_aerosol_due_to_wet_deposition
tendency_of_atmosphere_mass_content_of_seasalt_dry_aerosol_due_to_wet_de
position
tendency_of_atmosphere_mass_content_of_dust_dry_aerosol_due_to_wet_depos
it
ion
tendency_of_atmosphere_mass_content_of_hexachlorobiphenyl_due_to_wet_dep
osition
tendency_of_atmosphere_mass_content_of_alpha_hexachlorocyclohexane_due_t
o_wet_deposition
tendency_of_atmosphere_mass_content_of_gasesous_elemental_mercury_due_to
_wet_deposition
tendency_of_atmosphere_mass_content_of_gaseous_divalent_mercury_due_to_w
et_deposition
tendency_of_atmosphere_mass_content_of_mercury_dry_aerosol_due_to_wet_de
position
Tendency of atmospheric mass content due to emissions:
tendency_of_atmosphere_mass_content_of_carbon_monoxide_due_to_emission
tendency_of_atmosphere_mass_content_of_ammonia_due_to_emission
tendency_of_atmosphere_mass_content_of_sulfur_dioxide_due_to_emission
tendency_of_atmosphere_mass_content_of_dimethyl_sulfide_due_to_emission
tendency_of_atmosphere_mass_content_of_black_carbon_dry_aerosol_due_to_e
mission
tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_ae
rosol_due_to_net_production_and_emission
tendency_of_atmosphere_mass_content_of_secondary_particulate_organic_mat
ter_dry_aerosol_due_to_net_production
tendency_of_atmosphere_mass_content_of_primary_particulate_organic_matte
r_dry_aerosol_due_to_emission
tendency_of_atmosphere_mass_content_of_seasalt_dry_aerosol_due_to_emissi
on
tendency_of_atmosphere_mass_content_of_dust_dry_aerosol_due_to_emission
tendency_of_atmosphere_mass_content_of_hexachlorobiphenyl_due_to_emissio
n
tendency_of_atmosphere_mass_content_of_alpha_hexachlorocyclohexane_due_t
o_emission
tendency_of_atmosphere_mass_content_of_hexachlorobiphenyl_due_to_re_emis
sion
tendency_of_atmosphere_mass_content_of_alpha_hexachlorocyclohexane_due_t
o_re_emission
tendency_of_atmosphere_mass_content_of_gaseous_elemental_mercury_due_to_
emission
tendency_of_atmosphere_mass_content_of_gaseous_divalent_mercury_due_to_e
mission
tendency_of_atmosphere_mass_content_of_mercury_dry_aerosol_due_to_emissi
on
tendency_of_atmosphere_mass_content_of_nox_expressed_as_nitrogen_due_to_
emission (where NOx=NO+NO2)
Tendencies due to chemical reactions:
tendency_of_atmosphere_mole_concentration_of_ozone_due_to_chemical_gross
_production
tendency_of_atmosphere_mole_concentration_of_ozone_due_to_chemical_gross
_destruction
tendency_of_atmosphere_mole_concentration_of_methane_due_to_chemical_gro
ss
destruction
tendency_of_atmosphere_mole_concentration_of_carbon_monoxide_due_to_chem
ical_gross_destruction
Optical thickness:
atmosphere_optical_thickness_due_to_pm10_ambient_aerosol
atmosphere_optical_thickness_due_to_pm2p5_ambient_aerosol
atmosphere_optical_thickness_due_to_pm1_ambient_aerosol
atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol
atmosphere_optical_thickness_due_to_seasalt_ambient_aerosol
atmosphere_optical_thickness_due_to_dust_ambient_aerosol
atmosphere_optical_thickness_due_to_particulate_organic_matter_ambient_a
erosol
atmosphere_optical_thickness_due_to_water_in_ambient_aerosol
(Define as the difference between the total dry aerosol and the total
ambient aerosol optical thickness: it is due to the increase in aerosol
radius due to water uptake).
The following proposed names would be left out for now:
tendency_of_atmosphere_mass_content_of_all_nitrogen_oxides_expressed_as_
nitrogen_due_to_dry_deposition
tendency_of_atmosphere_mass_content_of_sulfate_dry_aerosol_due_to_dry_de
position
tendency_of_atmosphere_mass_content_of_all_nitrogen_oxides_expressed_as_
nitrogen_due_to_wet_deposition
tendency_of_atmosphere_mass_content_of_sulfate_dry_aerosol_due_to_wet_de
position
tendency_of_atmosphere_mass_content_of_sulfate_dry_aerosol_due_to_emissi
on
atmosphere_optical_thickness_due_to_nitrate_ambient_aerosol
atmosphere_optical_thickness_due_to_sulfate_ambient_aerosol
atmosphere_optical_thickness_due_to_ammonium_ambient_aerosol (The HTAP
discussion indicates that this proposed name may be withdrawn).
You also put forward a more recent set of proposals:
mole_fraction_of_carbon_dioxide_in_air
mole_fraction_of_methane_in_air
mole_fraction_of_formaldehyde_in_air
mole_fraction_of_ethane_in_air
mole_fraction_of_ethene_in_air
mole_fraction_of_ethyne_in_air
mole_fraction_of_propane_in_air
mole_fraction_of_propene_in_air
mole_fraction_of_benzene_in_air
mole_fraction_of_toluene_in_air
mole_fraction_of_xylene_in_air
mole_fraction_of_isoprene_in_air
I think the names look OK. Not being an organic chemist, I don't know
much about the last three species on your list. I'm aware that xylene
has a number of isomers. Could any of these names be considered 'group'
names? If so, they might be best left out of the table for now until we
can decide on how we're going to proceed with chemical names in the
future.
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre Fax: +44 1235 446314
Rutherford Appleton Laboratory Email: J.A.Pamment at rl.ac.uk
Chilton, Didcot, OX11 0QX, U.K.
Received on Tue Nov 06 2007 - 03:18:23 GMT
