Dear Alison,
regarding the thread "CF standard names for chemical constituents and aerosols":.
I think we agreed on the new physical quantities, for the chemical names I am not sure.
Then the discussion shifted towards the more general topic of how to integrate
chemical CF standard names in future and afterwards to general construction rules for all kinds of CF standard names.
My original proposal got a bit lost in these general discussions. Therefore I would like to focus on the chemical names again.
1. Physical Quantities
In the mails from the 24.10.2008 we agreed on:
tendency_of_atmosphere_mass_content_of_X_due_to_respiration : kg.m-2.s-1
tendency_of_mole_concentration_of_X_in_air_due_to_chemical_gross_production :/
/mol.m-3.s-1
tendency_of_mole_concentration_of_X_in_air_due_to_chemical_gross_destruction
:/
/mol.m-3.s-1
density_of_surface_area_of_X, m-1, This is the surface area of aerosol per volume of atmosphere (i.e. /m2.m-3=m-1)/
2. Chemical Quantities
For the new chemical species I am not that sure. I recall a discussion
about 'lumped' but cannot remember an agreement. The full list of names
for chemical species can be found in the wiki:
http://wiki.esipfed.org/index.php/CF_Standard_Names_-_Construction_of_Atmospheric_Chemistry_and_Aerosol_Terms
Regarding my proposal, I tried to keep track and the new names I found
in my files are:
atomic_oxygen
nitrate_radical
nitrous_acid
radon
methyl_peroxy_radical
methanol
formic_acid
aceto_nitrile
ethanol
acetic_acid
butane
alpha_pinene
beta_pinene
limonene
hcfc141b
hcfc142b
nitric_acid_trihydrate_aerosol
hox_expressed_as hydrogen
total_peroxy_radical
passive_ozone
noy_expressed_as_nitrogen
clox_expressed_as_chlorine
brox_expressed_as_bromine
lumped_alkanes
lumped_alkenes
lumped_aromatic_compounds
lumped_terpenes
nmvoc_expressed_as_carbon
anthropogenic_nmvoc_expressed_as_carbon
biogenic_nmvoc_expressed_as_carbon
lumped_oxygenated_hydrocarbons
3. Construction of "chemical CF names"
The discussion about a naming convention and construction guideline for
chemicals and aerosols is summed up by Christiane in the wiki:
http://wiki.esipfed.org/index.php/Modfication_of_existing_CF_standard_names.
The status there is:
<physical quantity>_of_<chemical quantity>_due_to_<process>
e.g.
tendency_of_atmosphere_mass_content_of_nox_expressed_as_nitrogen_due_to_emission
The position of <medium> is not absolutely clear, I would think:
<physical quantity>_of_<chemical quantity>_in_<medium>_due_to_<process>
If it is not a medium like "air" but a part of the earth system like
"atmosphere" it is not agreed (as far as I know), whether it should be
placed like the medium or in front.
Actually, the chemical names in the CF construction guideline
http://cf-pcmdi.llnl.gov/documents/cf-standard-names/guidelines are a
bit out-dated and needs to be revised or replaced by a link to the above
mentioned wiki page of the chemists.
What is still open to me (or I missed the agreement), is the question of
whether the CF standards names with each individual chemical species are
part of the CF convention or only the physical quantities and processes
with a place-holder for the chemical quantity.
Heinke proposed a possibility how we could deal with the place-holder
(she called "constituent") in netCDF-headers, about which I could not
find a real discussion,
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2008/002421.html:
dimensions:
lat=72;
lon=124;
maxlen=30;
float quantity(lat,lon,height,time) ;
quantity:standard_name = "mass_fraction_of_constituent_in_air" ;
quantity:units = "1" ;
quantity:coordinates = "constituent" ;
char constituent(maxlen);
constituent:standard_name='IUPAC_system';
data:
constituent='ozone';
I hope to revive the discussion to reach an agreement of this rather old
thread as well, at least on the first and second parts (1. and 2.).
Best wishes,
Martina
Pamment, JA (Alison) wrote:
> Dear All,
>
> Over recent weeks there has been a large number of proposals for new
> standard names. To help keep track of them all I have prepared a brief
> summary of the currently open standard names discussion threads. The
> proposals are listed in date order (oldest first). If any set of
> proposals has been missed from this list please let me know and it will
> be added.
>
> The next update of the standard name table will take place on 10 March.
> This will definitely go ahead as there are agreed names waiting for
> inclusion. A complete list of the new names and other planned
> modifications to the table will be published in advance of the update.
>
> I have recently been concentrating on the various sets of ocean related
> proposals, the majority of which are now agreed. The oldest, and by far
> the largest, of the remaining threads is that relating to the set of
> chemical names originally proposed by Martina Stockhause. I would like
> to take the same approach with the chemistry names as I have with the
> ocean names, i.e. review several threads in tandem, as this helps to
> keep track of any issues affecting more than one set of names. Most
> recently, various sets of names have been proposed relating to the CMIP5
> work and these need to be addressed on a relatively short timescale.
> Therefore, over the next few weeks I will be dividing my time mainly
> between the chemistry names and the various CMIP5 threads.
>
> As there is currently much activity in the area of standard names I will
> publish another summary status report in two weeks time to give an
> update on the situation.
>
> Best wishes,
> Alison
>
> Thread(s): CF standard names for chemical constituents andaerosols
> (resulting from a GRIB2 proposal); CF: new names for atmospheric
> chemistry and aerosols; CF standard names for chemical constituents
> andaerosols; standard names for chemistry - MCM
> Proposer: Martina Stockhause
> Date proposed: 18 Sep 2008
> Number of names (approx.): 2 800
> Project(s): GRIB2
> Status: Open, currently being reviewed
>
> Thread(s): Standard name(s) needed for satellite-based icedrift products
> Proposer: Thomas Lavergne
> Date proposed: 24 Oct 2008
> Number of names (approx.): 6
> Project(s):
> Status: Open, mostly agreed, definitions still under discussion
>
> Thread(s): new named fields for ocean
> Proposer: Stephen Griffies
> Date proposed: 6 Nov 2008
> Number of names (approx.): 60
> Project(s): CMIP5
> Status: Open, most names agreed
>
> Thread(s): CF standard names for echam5-hammoz
> Proposer: Heinke Hoeck
> Date proposed: 7 Nov 2008
> Number of names (approx.): 90
> Project(s): echam5-hammoz model (aerosol-chemistry-climate)
> Status: Open, currently being reviewed
>
> Thread(s): new names for AeroCom - optcial properties; new names for
> AeroCom - cloud properties; new names for AeroCom - mass / mole /
> number; new names for AeroCom - tendencies; new names for AeroCom -
> remaining; new names for AeroCom
> Proposer: Christiane Textor
> Date proposed: 23 Nov 2008
> Number of names (approx.): 50 (total for all threads)
> Project(s): AeroCom; HTAP; AC&C
> Status: Open, currently being reviewed
>
> Thread: Proposed CF standard names for the NEMO oceanmodel
> Proposer: Ian Culverwell
> Date proposed: 26 Nov 2008
> Number of names (approx.): 3
> Project(s): NEMO
> Status: Open, all names now accepted
>
> Thread: Proposal for new CF standard_names, ocean biochemistry
> Proposer: Bruce Hackett
> Date proposed: 28 Nov 2008
> Number of names (approx.): 13
> Project(s):
> Status: Open
>
> Thread: Mixing Ratio
> Proposer: Heinke Hoeck
> Date proposed: Nov 2008 (arising from earlier thread 'new standard names
> for ECHAM5/CLM/ERA')
> Number of names (approx.): 1
> Project(s):
> Status: Open
>
> Thread: new standard names for atmospheric dynamics
> Proposer: Martin Schultz
> Date proposed: 14 Jan 2009
> Number of names (approx.): 8
> Project(s): ECHAM
> Status: Open
>
> Thread: Some new standard names for ocean model fields
> Proposer: Adam Blaker
> Date proposed: 20 Jan 2009
> Number of names (approx.): 14
> Project(s):
> Status: Open, all names now accepted
>
> Thread: New Cryospheric variables
> Proposer: Siobhan O' Farrell
> Date proposed: 22 Jan 2009
> Number of names (approx.): 130 (of which some appear to be quantities
> already in the standard name table)
> Project(s): CMIP5
> Status: Open, currently being reviewed
>
> Thread: Some new standard names for cloud feedback study
> Proposer: Tomoo Ogura
> Date proposed: 26 Jan 2009
> Number of names (approx.): 33
> Project(s): CMIP5
> Status: Open, currently being reviewed
>
> Thread: Emissivity not found in the current standard name table
> Proposer: Won, Young-In
> Date proposed: 29 Jan 2009
> Number of names (approx.): 3
> Project(s): AIRS (Atmospheric Infrared Sounders)
> Status: Open, currently being reviewed
>
> Thread: Proposal for new standard names (this thread relates to cloud
> radiative properties)
> Proposer: Alejandro Bodas-Salcedo
> Date proposed: 11 Feb 2009
> Number of names (approx.): 38
> Project(s): CFMIP-2/CMIP5
> Status: Open, currently being reviewed
>
> Thread: new variables (this thread contains heat flux and friction
> names)
> Proposer: Christof Luepkes
> Date proposed: 11 Feb 2009
> Number of names (approx.): 5
> Project(s):
> Status: Open
>
> ------
> J Alison Pamment Tel: +44 1235 778065
> NCAS/British Atmospheric Data Centre Fax: +44 1235 446314
> Rutherford Appleton Laboratory Email: alison.pamment at stfc.ac.uk
> Chilton, Didcot, OX11 0QX, U.K.
>
>
>
--
--- CliSAP - Integrated Climate Data Center ---
Martina Stockhause
University of Hamburg
CliSAP
Grindelberg 5
D-20144 Hamburg
Germany
phone: +49-40-42838-7582
FAX: +49-40-42838-7711
e-mail: martina.stockhause at zmaw.de
-----------------------------------------------
Received on Fri Feb 20 2009 - 01:17:54 GMT
