Dear Brigitte,
thanks for your reply!
I would have some comments to your proposed definitions:
1) Definition of term "aerosol"
In the discussion on the standard names I'm working on (mainly between Jonathan
Gregory an me), this aspect has come up as well. There are 2 uses of the term
"aerosol": 1) according to the textbook definition (and here really "any"
textbook for aerosol science 101) meaning the system of aerosol particles and
carrier gas; 2) the non-textbook use of denoting the aerosol particles only by
the term "aerosol". I hate to say that the non-textbook use seems to be more
wide-spread in the air quality community as opposed to other scientific aerosol
communities I've worked with. Jonathan also pointed out that the use of
"aerosol" in existing CF-standard names is inconsistent, with both uses of
"aerosol" occurring (see attached e-mail). We agreed to go for the textbook use
of "aerosol" for all future definitions, and to try to clean up the older
standard names with aliases. This is mainly because CF standard names should be
as self-explaining as possible, which requires precise language use and avoiding
ambiguous language. I would therefore propose the following definitions:
* "aerosol" means the system of suspended liquid or solid particles and their
carrier gas air (except cloud droplets)
* /"ambient/_/aerosol_particles" /are/aerosol particle/s /that ha/ve/ taken up
ambient water through hygroscopic growth. The extent of hygroscopic growth
depends on the relative humidity and the composition of the aerosol particles./
* ///"/d/ry/_/aerosol_particles" mean the aerosol particles without any water
uptake./
* //"//dried_aerosol_particles/" mean the aerosol particles where some drying
has been applied with respect to the ambient state, but which not
necessarily reached the dry state///(requires co-ordinate variable
"relative_humidity")
I fully agree with using "elemental_carbon" instead of "black_carbon". For your
use in modelling aerosol air quality effects, this makes lots of sense since
virtually all respective emission inventories are based on measurements of
elemental carbon. I would just not base the definition on Shah and Rau (1990).
This publication represents the time when terminology confusion around
black/elemental carbon was complete. I would rather propose to use this
definition by Petzold et al. (2013) that tries to establish borders between the
different black carbon properties, and thus avoids ambiguities:
Elemental carbon (EC): carbonaceous fraction of particulate matter that is
thermally stable in an inert atmosphere to high temperatures near 4000K and can
only be gasified by oxidation starting at temperatures above 340 C. It is
assumed to be inert and nonvolatile under atmospheric conditions and insoluble
in any solvent (Ogren and Charlson, 1983).
Best regards,
Markus
Am 14.03.2014 12:01, schrieb Brigitte Koffi:
> Dear all,
>
> In reply to Markus email dated of 01/25/2014 (below)
>
> Thecurrent CF definitions for "aerosol" are:
> /-"Aerosol" means the suspended liquid or solid particles in air (except cloud
> droplets).
> - "Ambient aerosol" is aerosol that has taken up ambient water through
> hygroscopic growth. The extent of hygroscopic growth depends on the relative
> humidity and the composition of the aerosol.//
> //- "Dry aerosol" means aerosol without water.
> //
>
> /
>
> We could eventually propose to modify as follows:
>
> * "ambient aerosol" to "aerosol" ; New definition: "Aerosol" means the
> suspended liquid or solid particles in air (except cloud droplets). The
> aerosol takes up ambient water through hygroscopic growth. The extent of
> hygroscopic growth depends on the relative humidity and the composition of
> the aerosol.Unless a specific relative humidity is indicated, it refers to
> the aerosol in the ambient air conditions.
> * "dry aerosol" : no change
> * "black_carbon" to "elemental_carbon". Definition: A form of carbon that is
> essentially pure carbon rather than being chemically combined with
> hydrogen and/or oxygen. It can exist either in an amorphous or crystalline
> structure (Shah and Rau, 1990)
>
> but then it would require to indicate that earlier standard names
> "black_carbon" and "ambient_aerosol" are unrecommended synonymes ?
>
> Brigitte
>
> On 1/25/2014 10:56 AM, Fiebig, Markus wrote:
>> Dear Brigitte,
>>
>> apologies for getting involved in this discussion at this stage. However there
>> are a few issues I'd like to point out concerning the wording of the standard
>> names you propose:
>>
>> 1) Use of the term "aerosol"
>> In the discussion of a few aerosol variables that I'm currently proposing on
>> this list, we came across the issue that the textbook definition of "aerosol"
>> means the system of carrier gas and particles. A few existing standard names use
>> "aerosol" in the sloppy colloquial way of referring to the aerosol particles
>> only. The discussion concluded that, for new standard names, we should stick
>> with the textbook definition of aerosol, and preferably clean up existing
>> standard names using "aerosol" the sloppy way with aliases. It seems that some
>> standard names you propose also use aerosol the sloppy way, e.g. in
>> "tendency_of_atmosphere_mass_content_of_nitrate_dry_aerosol_due_to_wet_deposition"
>> or "atmosphere_optical_thickness_due_to_ammonium_ambient_aerosol". This should
>> be corrected.
>>
>> 2) Use of the term "black carbon"
>> The term "black carbon" is used with many different definitions according to
>> which research community is concerned. There was a recent article by Petzold et
>> al. (2013, ACP 13, 8365-8379) that tries to give guidelines on how to use the
>> term. According to this article, "black carbon" can't be measured, and therefore
>> should be used only in a qualitative manner. For standard names that denote a
>> quantifiable property, the term for the corresponding measured property should
>> be used, e.g. "elemental_carbon", "absorption_coefficient",
>> "equivalent_black_carbon".
>>
>> Best regards,
>> Markus
>>
>>> Dear all,
>>> HTAP 2 runs have begun and we would like to check how the HTAP CF standard
>>> names proposal is coming along.
>>> Up to now, I only received one correction ("photolysis" instead of "photolyse").
>>> Alison: did you already approve some/most of them?
>>> Thank you for keeping me informed,
>>> Brigitte
>>>
>>>
>>> On 12/20/2013 10:25 AM, Brigitte Koffi Lefeivre wrote:
>>>
>>> Dear Alison and CF metadata community,
>>>
>>>
>>> /PLease find below the complete list of the new CF standard names that we
>>> propose in the frame of HTAP2.
>>> With my apologies for having used a wrong email address at some point in
>>> my previous submissions.
>>> /-------------------------------------------------------------------------------------------------------------------
>>>
>>>
>>> The Task Force on Hemispheric Transport of Air Pollution (TF HTAP) is an
>>> international scientific cooperative effort
>>> to improve the understanding of the international transport of air
>>> pollution across the Northern Hemisphere.
>>> In 2010, TF HTAP produced a first comprehensive assessment report
>>> (available under www.htap.org <http://www.htap.org>).
>>> The ongoing HTAP Phase 2 (HTAP2) exercise, which includes coupled
>>> regional-global modelling,
>>> is designed to provide more detailed intercontinental source-receptor
>>> calculations,
>>> as well as higher resolution estimates of the impacts on health,
>>> vegetation and climate.
>>>
>>> *A total a 102 new standard names is proposed for approval: *
>>>
>>> 1. 20 new standard_names for emission fields (
>>> /tendency_of_atmosphere_mass_content_of_*_due_to_emission*/ ; Unit=kg m-2 s-1)
>>> 2. 31 new standard_names for deposition
>>> (/tendency_of_atmosphere_mass_content*_due_to_dry_deposition/;
>>> /tendency_of_atmosphere_mass_content*_due_to_wet_deposition/; Unit=kg m-2 s-1)
>>> 3. 25**new standard_names for mass mixing ratio of aerosols
>>> (/mass_fraction_of_*_in_air/; Unit=kg kg-1)
>>> 4. 7 new standard_names for volume mixing ratio of gases
>>> (/mole_fraction_of_*_in_air/; Unit=mole mole-1)
>>> 5. 19 new standard_names for other gaseous and aerosol variables.
>>>
>>> In most of the cases, the new part already exists as a standard_name in
>>> itself. Therefore, only definition of *new words* (in bold) are provided.
>>> * means that the new standard name is a shortened (generic) version of
>>> existing one(s)
>>>
>>> *
>>> 1. EMISSIONS*
>>> ------------------------------------------------------------------------------------------------------------------------
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_dry_aerosol_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_dry_aerosol_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_seasalt_dry_aerosol_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_dust_dry_aerosol_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_seasalt_dry_aerosol_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_dust_dry_aerosol_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_nox_expressed_as_nitrogen_monoxide_due_to_emission_from_soil
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_nmvoc_expressed_as_carbon_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_nmvoc_due_to_emission*
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_alkanes_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_alkenes_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_aromatic_compounds_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_biogenic_nmvoc_expressed_as_carbon_due_to_emission
>>>
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_aerosol_due_to_emission***
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_aerosol_expressed_as_carbon_due_to_emission***
>>>
>>> Unit: kg m-2 s-1
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_secondary_particulate_organic_matter_dry_aerosol_due_to*_pseudo_emission.*
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: pseudo_emission means that the model does not calculate the
>>> particulate organic matter formed within the atmosphere from gaseous
>>> precursors but uses a pseudo emission instead.
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*acetaldehyde*_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: The chemical formula for acetaldehyde is CH3CHO. The IUPAC
>>> name for acetaldehyde is ethanal.
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*acetone*_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: The chemical formula for acetone is CH3COCH3. The IUPAC name
>>> for acetone is propanone.
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*monoterpenes*_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: Monoterpenes are a class of terpenes that consist of two
>>> isoprene units and have the molecular formula C10H16.
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*sesquiterpenes*_due_to_emission
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: Sesquiterpenes are a class of terpenes that consist of three
>>> isoprene units and have the molecular formula C15H24.
>>>
>>>
>>> *2. DEPOSITIONS*
>>> ------------------------------------------------------------------------------------------------------------------------
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*organic_nitrates*_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: organic nitratesare nitrogen-containing compounds, general
>>> formula RONO2, where R is an alkyl (or organic) group.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_noy_expressed_as_nitrogen_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendendy_of_atmosphere_mass_content_of_*acetaldehyde*_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: The chemical formula for acetaldehyde is CH3CHO. The IUPAC
>>> name for acetaldehyde is ethanal.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_aldehydes_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of*_organic_peroxides*_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: Organic peroxides are organic molecules containing an
>>> oxygen?oxygen linkage. The general chemical formula is ROOR or ROOH, where
>>> R is an organic group.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*methanesulfonic_acid*_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: The chemical formula for the methane sulfonic acid is CH3SO3H.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_dry_aerosol_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_seasalt_dry_aerosol_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_dust_dry_aerosol_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_dry_aerosol_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_seasalt_dry_aerosol_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_dust_dry_aerosol_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_aerosol_expressed_as_carbon_due_to_dry_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of*_organic_nitrates*_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: organic nitratesare nitrogen-containing compounds, general
>>> formula RONO2, where R is an alkyl (or organic) group.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_nitrate_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_nitrous_acid_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_noy_expressed_as_nitrogen_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_formaldehyde_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*acetaldehyde*_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: The chemical formula for acetaldehyde is CH3CHO. The IUPAC
>>> name for acetaldehyde is ethanal.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_aldehydes_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_hydrogen_peroxide_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*organic_peroxides*_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: Organic peroxides are organic molecules containing an
>>> oxygen?oxygen linkage. The general chemical formula is ROOR or ROOH, where
>>> R is an organic group.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_sulfate_dry_aerosol_due_to_wet_deposition*
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*methanesulfonic_acid*_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: The chemical formula for the methane sulfonic acid is CH3SO3H.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_seasalt_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm10_dust_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_seasalt_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_pm2p5_dust_dry_aerosol_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_aerosol_expressed_as_carbon_due_to_wet_deposition
>>>
>>> Unit: kg m-2 s-1
>>>
>>> *3. MASS MIXING RATIO*
>>> ------------------------------------------------------------------------------------------------------------------------
>>>
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_particulate_organic_matter_dry_aerosol_expressed_as_carbon_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm1_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm10_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm10_black_carbon_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm10_dust_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_water_in_pm10_ambient_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm10_ammonium_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm10_nitrate_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm10_organic_matter_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm10_organic_matter_dry_aerosol_expressed_as_carbon_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm10_primary_organic_matter_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm10_sulfate_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm10_sea_salt_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm2p5_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm2p5_black_carbon_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm2p5_dust_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_water_in_pm2p5_ambient_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm2p5_ammonium_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm2p5_nitrate_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm2p5_organic_matter_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm2p5_organic_matter_dry_aerosol_expressed_as_carbon_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_pm2p5_primary_organic_matter_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm2p5_sulfate_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name: mass_fraction_of_pm2p5_sea_salt_dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Proposed new standard name:
>>> mass_fraction_of_*methanesulfonic_acid_*dry_aerosol_in_air
>>>
>>> Unit: kg kg-1
>>>
>>> Definition: The chemical formula for the methanesulfonic acid is CH3SO3H
>>>
>>>
>>>
>>> *4. MOLE MIXING RATIO*
>>> ------------------------------------------------------------------------------------------------------------------------
>>>
>>> Proposed new standard name: mole_fraction_of_*acetone*_in_air
>>>
>>> Unit: mol mol-1
>>>
>>> Definition: Acetone is an organic molecule with the chemical formula
>>> CH3CH3CO. It is also called propanone.
>>>
>>> Proposed new standard name: mole_fraction_of_alkenes_in_air
>>>
>>> Unit: mol mol-1
>>>
>>> Proposed new standard name: mole_fraction_of_*acetaldehyde*_in_air
>>>
>>> Unit: mol mol-1
>>>
>>> Definition: Acetaldehydeis an organic molecule with the chemical formula
>>> CH3CHO. It is also called ethanal.
>>>
>>> Proposed new standard name:
>>> mole_fraction_of_carbon_monoxide_*with_lifetime_of_25_days*_in_air
>>>
>>> Unit: mol mol-1
>>>
>>> Definition: idealized CO-like tracer with 25-days lifetime
>>>
>>> Proposed new standard name:
>>> mole_fraction_of_carbon_monoxide_*with_lifetime_of_50_days*_in_air
>>>
>>> Unit: mol mol-1
>>>
>>> Definition: idealized CO-like tracer with 50-days lifetimes
>>>
>>> Proposed new standard name: mole_fraction_of_*glyoxal_*in_air
>>>
>>> Unit: mol mol-1
>>>
>>> Definition: Glyoxal is an organic molecule with the chemical formula
>>> C2H2O2. It is also called ethanedial.
>>>
>>> **
>>>
>>> Proposed new standard name: mole_fraction_of_*organic_nitrates*_in_air
>>>
>>> Unit: mol mol-1
>>>
>>> Definition:**Organic nitrates are organic esters or salts of nitric acid.
>>>
>>>
>>>
>>> *5. OTHER GASEOUS AND AEROSOL VARIABLES.
>>> *------------------------------------------------------------------------------------------------------------------------
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_sulfate_dry_aerosol_due_to_*aqueous_phase*_net_chemical_production
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: aqueous phase (fog and clouds) is meant as opposed to gaseous
>>> phase.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_sulfate_dry_aerosol_due_to_*gaseous_phase*_net_chemical_production
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: gaseous-phase is meant as opposed to aqueous phase.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_*methanesulfonic_acid*_dry_aerosol_due_to_net_chemical_production
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: The chemical formula for the methanesulfonic acid is CH3SO3H.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mass_content_of_nitrate_dry_aerosol_due_to_net_chemical_production
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name: *photolyse*_*rate*_of_nitrogen_dioxide
>>>
>>> Unit: s-1
>>>
>>> Definition: The (reaction) rate is the rate at which the reactants of a
>>> chemical reaction form the products. ?photolyse? is a chemical reaction in
>>> which a chemical compound is broken down by photons.
>>>
>>> To be corrected as follows:
>>>
>>> Proposed new standard name: *photolysis*_*rate*_of_nitrogen_dioxide
>>>
>>> Unit: s-1
>>>
>>> Definition:The (reaction) rate is the rate at which the reactants of a
>>> chemical reaction form the products. ?photolysis? is a chemical reaction in
>>> which a chemical compound is broken down by photons.
>>>
>>>
>>>
>>> Proposed new standard name: *photolysis_rate*_of_ozone_to_*1D_oxygen_atom*
>>>
>>> Unit: s-1
>>>
>>> Definition: ?photolyse? is a chemical reaction in which a chemical compound is
>>> broken down by photons. ?1D oxygen atom? means the 1D excited state of the
>>> oxygen atom.
>>>
>>> To be corrected as follows:
>>>
>>> Proposed new standard name: *photolysis_rate*_of_ozone_to_*1D_oxygen_atom*
>>>
>>> Unit: s-1
>>>
>>> Definition:?photolysis? is a chemical reaction in which a chemical compound is
>>> broken down by photons. ?1D oxygen atom? means the 1D excited state of the
>>> oxygen atom.
>>>
>>>
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mole_concentration_of_methane_due_to_*chemical_destruction*
>>>
>>> Unit: mole m-3 s-1
>>>
>>> Definition: "chemical destruction" means the result of all chemical reactions
>>> within the atmosphere that destroy a particular species.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_of_mole_concentration_of_carbon_monoxide_due_to_*chemical_destruction*
>>>
>>> Unit: mole m-3 s-1
>>>
>>> Definition: "chemical destruction" means the result of all chemical reactions
>>> within the atmosphere that destroy a particular species.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mole_concentration_of_ozone_due_to_*chemical_destruction*
>>>
>>> Unit: mole m-3 s-1
>>>
>>> Definition: "chemical destruction" means the result of all chemical reactions
>>> within the atmosphere that destroy a particular species.
>>>
>>> Proposed new standard name:
>>> tendency_of_atmosphere_mole_concentration_of_ozone_due_to_chemical_production
>>>
>>> Unit: mole m-3 s-1
>>>
>>> **
>>>
>>> Proposed new standard name: number_concentration_of_pm10_in_air
>>>
>>> Unit: m-3
>>>
>>> Proposed new standard name: number_concentration_of_pm2p5_in_air
>>>
>>> Unit: m-3
>>>
>>> Proposed new standard name:
>>> atmosphere_optical_thickness_due_to_ammonium_ambient_aerosol
>>>
>>> Unit: 1
>>>
>>> Proposed new standard name:
>>> atmosphere_optical_thickness_due_to_nitrate_ambient_aerosol
>>>
>>> Unit: 1
>>>
>>> Proposed new standard name:
>>> atmosphere_optical_thickness_due_to_sulfate_ambient_aerosol
>>>
>>> Unit: 1
>>>
>>> Proposed new standard name: rate_of_
>>> hydroxyl_radical_destruction_due_to_reaction_with_nmvoc
>>>
>>> Unit: s-1
>>>
>>> Definition: The (reaction) rate is the rate at which the reactants of a
>>> chemical reaction form the products. The ?hydroxyl radical destruction due to
>>> reaction with nmvoc? is the NMVOC reactivity with regard to reactions with OH.
>>> It is the sum of the reactivity of all individual NMVOC species with OH.
>>>
>>> Proposed new standard name: surface_net_downward_mass_flux_of_ammonia
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Definition: "Downward" indicates a vector component which is positive when
>>> directed downward. Surface_net_downward_mass_flux_of_ammonia is equal to the
>>> difference between the quantities with standard names
>>> ?surface_downward_mass_flux_of_ammonia? and ?surface_upward_mass_flux_of_ammonia?.
>>>
>>>
>>> Proposed new standard name: surface_downward_mass_flux_of_ammonia
>>>
>>> Unit: kg m-2 s-1
>>>
>>> Proposed new standard name: surface_upward_mass_flux_of_ammonia
>>>
>>> Unit: kg m-2 s-1
>>>
>>> ----------------
>>> Dr Brigitte Koffi
>>>
>>> Air and Climate unit
>>>
>>> European Commission, Joint Research Centre
>>>
>>> Institute for Environment and Sustainability
>>>
>>> TP290,Via E. Fermi, 2749, I-21027 Ispra (VA), Italy
>>>
>>> Tel: +390332786704
>>>
>>> Fax: +390332785837
>>>
>>> Tel secretary: +390332783080
>>>
>>> http://ccu.jrc.ec.europa.eu
>>>
>>>
>>> ------------------------------------------------------------------------------------------------
>>> ------------------------------------------------------------------------------------------------
>>> Forschungszentrum Juelich GmbH
>>> 52425 Juelich
>>> Sitz der Gesellschaft: Juelich
>>> Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
>>> Vorsitzender des Aufsichtsrats: MinDir Dr. Karl Eugen Huthmacher
>>> Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender),
>>> Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
>>> Prof. Dr. Sebastian M. Schmidt
>>> ------------------------------------------------------------------------------------------------
>>> ------------------------------------------------------------------------------------------------
>>>
>
--
Dr. Markus Fiebig
Senior Scientist
Dept. Atmospheric and Climate Research (ATMOS)
Norwegian Institute for Air Research (NILU)
P.O. Box 100
N-2027 Kjeller
Norway
Tel.: +47 6389-8235
Fax : +47 6389-8050
e-mail: Markus.Fiebig at nilu.no
skype: markus.fiebig
P Please consider the environment before printing this email and attachments
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From: Jonathan Gregory <j.m.gregory at reading.ac.uk>
Subject: [CF-metadata] standard names for surface aerosol optical properties
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