Hi Angelika,
Are your emissions separated into 2D surface and 3D emissions (eg aircraft
emissions)?
I assume so, because that is what I usually see.
If so, your proposed quantities
(tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_)
may not be what you want.
"atmosphere_content of a quantity refers to the vertical integral from
the surface to the top of the atmosphere." [from CF standard name table]
[For non-specialists: There are three related emission quantities: 2D
surface emissions (kg/m2/s), 3D volume emissions (kg/m3/s), and the column
integral tendency_of_atmosphere_mass_content_of_X_due_to_emission
(kg/m2/s). These three quantities are simply related by:
tendency_of_atmosphere_mass_content_of_X_due_to_emissions =
surface emissions + vertical integral of 3D volume emissions.
Usually people specify the surface and volume emissions, but in CF we
ended up with mostly the column integral
tendency_of_atmosphere_mass_content_of_X_due_to_emissions.
Usually this isn't a big deal because the volume emissions for most
species are zero, so the tendency_of_atmosphere_mass_content is equal to
the surface emissions.
However, this isn't true for CO2. Volume emissions are also often used
for other aircraft emissions (eg CO, SO2, and NOx) and lightning emissions
(primarily NOx).]
Searching through the standard name table I can find only two surface
flux quantities for species: surface_carbon_dioxide_mole_flux, and
surface_downward_water_flux. However, there are lots surface
flux quantities for radiation and heat.
I can't find any volume emission quantities.
For your 3D emissions I suspect you will want something like:
tendency_of_mass_fraction_of_X_in_air_due_to_emission_from_[sector]
Or, instead of mass_fraction (kg/kg) you might use mass_concentration
(kg/m3), mole_concentration (mol/m3), or mole_fraction (mol/mol).
For your 2D surface emissions it would be most logical to me to
expand the surface_flux constructs mentioned above, although we haven't
established a good pattern, since I think those two quantities were
introduced before we started talking about chemistry.
Note: none of my comments relate to the proposed from_sector construct,
which seems fine to me.
Best wishes,
Philip
Heil, Angelika wrote:
Dear all,
I would like to propose new CF standard names for different emission sectors. It was agreed some
time ago "that "emission" is a general term that includes sources located anywhere
in the atmosphere, such as aircraft, and sources located at the earth's surface." (Posting
J.A.Pamment May 4 2007, 07:21:23)
The new gridded emission files which have been prepared for the IPCC AR5
simulations are subdivided into 12 emission sectors (see also Lamarque et al.
2010, www.*atmos-chem-phys-discuss.net/10/4963/2010/ and, in more detail,
ftp://*ftp-ipcc.fz-juelich.de/pub/emissions/ancillary_data/IPCC_AR5_Emission_Sectors_v02.xls)
and we would need specific standard names for them. (The issue was once raised
by Martin Schultz - see Alison's mail from May 20 2009 15:06:26 +0100).
I would therefore like to expand the "due_to_<process>" syntax with <process> =
emission.
For the moment, I'm proposing the expansion for carbon dioxide, only. Other
species will follow.
Here are the CF standard names that I propose for the 12 IPCC AR5 emission
sectors:
1)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_energy_production_and_distribution
kg m-2 s-1
2)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_industrial_processes_and_combustion
kg m-2 s-1
3)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_residential_and_commercial_combustion
kg m-2 s-1
4)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_solvent_production_and_use
kg m-2 s-1
5)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_agricultural_production
kg m-2 s-1
6)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_agricultural_waste_burning
kg m-2 s-1
7)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_waste_treatment_and_disposal
kg m-2 s-1
8)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_forest_fires
kg m-2 s-1
9)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_savanna_and_grassland_fires
kg m-2 s-1
10)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_land_transport
kg m-2 s-1
11)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_maritime_transport
kg m-2 s-1
12)
tendency_of_atmosphere_mass_content_of_carbon_dioxide_due_to_emission_from_aviation
kg m-2 s-1
Best regards
Angelika
=============================================
Angelika Heil
ICG-II, Forschungszentrum Jülich
D-52425 Jülich, Germany
phone: +49(0)2461 61 6864
fax: +49(0)2461 61 5346
email: [email protected]
(for visitors:
Wilhelm Johnen Str., Building 05.2 Room 3030)
=============================================
------------------------------------------------------------------------------------------------
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Forschungszentrum Juelich GmbH
52425 Juelich
Sitz der Gesellschaft: Juelich
Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe
Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender),
Dr. Ulrich Krafft (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
Prof. Dr. Sebastian M. Schmidt
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Dr Philip Cameron-Smith Atmospheric, Earth, and Energy Division
[email protected] Lawrence Livermore National Laboratory
+1 925 4236634 7000 East Avenue, Livermore, CA94550, USA
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