Dear Martin,
On 06/04/18 16:02, Martin Juckes - UKRI STFC wrote:
> the four names for methane, water vapor, carbon monoxide and nitrogen dioxide result from simple application of existing CF name patterns, so I support their adoption as you have proposed them.
>
>> * atmosphere_mole_content_of_methane
>> * atmosphere_mole_content_of_water_vapor
>> * atmosphere_mole_content_of_carbon_monoxide
>> * atmosphere_mole_content_of_nitrogen_dioxide
>
>
> For semiheavy-water, there is a related discussion about variable required for CMIP6 by PMIP:
>
> : http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2018/059995.html
>
>
> For PMIP we need names referring to multiple isotopic variants of water vapor: H-2H-O, H2-O17, H2-O18. We have taken an approach which allows us to be precise in the name and deal with all these variants:
>
> e.g. precipitation_flux_containing_2H. This has not been accepted yet, but has some support. Would you be happy to use:
>
> atmosphere_mole_content_of_water_vapor_containing_2H
>
> with help text which makes it clear that this means a single "2H" atom per water molecule?
>
> e.g. "The expression A_containing_B refers to the amount of A which contains B. When B is an isotope, it refers to molecules of A which contain one atom of B, unless indicated otherwise by a number following B."
I'm happy to use anything that is clear and consistent with other names. I don't
think isotopes have been used in names before, so we're on uncharted territory. I
understand the need to be more accurate than what I have, although this notation
required some getting used to. I assume that "containing_18O" is for H_2(18-O).
That modification is fine with me if the CMIP6 proposal gets through. If that
proposal gets through with modifications, then I prefer to be consistent with those
modifications as well.
Kind regards,
Maarten
> ________________________________
> From: CF-metadata <cf-metadata-bounces at cgd.ucar.edu> on behalf of Maarten Sneep <maarten.sneep at knmi.nl>
> Sent: 06 April 2018 13:00
> To: cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] Standard name proposal related to methane, water vapor, carbon monoxide, semi-heavy water, and nitrogen dioxide.
>
> Hi,
>
> I haven't heard anything after sending this in. Can these names be considered for
> inclusion in the standard_name list?
>
> Kind regards,
>
> Maarten Sneep
>
> On 23/02/18 15:04, Maarten Sneep wrote:
>> Hi,
>>
>> I'd like to propose the following standard names:
>>
>> * atmosphere_mole_content_of_methane
>> * atmosphere_mole_content_of_water_vapor
>> * atmosphere_mole_content_of_carbon_monoxide
>> * atmosphere_mole_content_of_semiheavy_water_vapor
>> * atmosphere_mole_content_of_nitrogen_dioxide
>>
>> Details are provided below.
>>
>> atmosphere_mole_content_of_methane
>> Canonical units: mol/m2
>> Description: "Content" indicates a quantity per unit area. The "atmosphere content"
>> of a quantity refers to the vertical integral from the surface to the top of the
>> atmosphere. For the content between specified levels in the atmosphere, standard
>> names including "content_of_atmosphere_layer" are used. The construction
>> "atmosphere_mole_content_of_X" means the vertically integrated number of moles of X
>> above a unit area. The chemical formula for methane is CH4. Methane is a member of
>> the group of hydrocarbons known as alkanes. There are standard names for the alkane
>> group as well as for some of the individual species.
>>
>> (References: atmosphere_mass_content_of_methane, atmosphere_mole_content_of_ozone;
>> for ozone both mole content and mass content exist).
>>
>>
>> atmosphere_column_average_mole_fraction_of_methane_in_dry_air
>> Canonical units: 1
>>
>>
>> atmosphere_mole_content_of_water_vapor
>> Canonical units: mol/m2
>> Description: "Content" indicates a quantity per unit area. The "atmosphere content"
>> of a quantity refers to the vertical integral from the surface to the top of the
>> atmosphere. For the content between specified levels in the atmosphere, standard
>> names including "content_of_atmosphere_layer" are used. The construction
>> "atmosphere_mole_content_of_X" means the vertically integrated number of moles of X
>> above a unit area. The chemical formula for water is H2O. Atmosphere water vapor
>> content is sometimes referred to as "precipitable water", although this term does not
>> imply the water could all be precipitated.
>>
>> (References: atmosphere_mass_content_of_water_vapor,
>> atmosphere_mole_content_of_ozone; for ozone both mole content and mass content exist).
>>
>>
>> atmosphere_mole_content_of_carbon_monoxide
>> Canonical units: mol/m2
>> Description: "Content" indicates a quantity per unit area. The "atmosphere content"
>> of a quantity refers to the vertical integral from the surface to the top of the
>> atmosphere. For the content between specified levels in the atmosphere, standard
>> names including "content_of_atmosphere_layer" are used. The construction
>> "atmosphere_mole_content_of_X" means the vertically integrated number of moles of X
>> above a unit area. The chemical formula for carbon monoxide is CO.
>>
>> (References: atmosphere_mass_content_of_carbon_monoxide,
>> atmosphere_mole_content_of_ozone; for ozone both mole content and mass content exist).
>>
>>
>> atmosphere_mole_content_of_semiheavy_water_vapor
>> Canonical units: mol/m2
>> Description: "Content" indicates a quantity per unit area. The "atmosphere content"
>> of a quantity refers to the vertical integral from the surface to the top of the
>> atmosphere. For the content between specified levels in the atmosphere, standard
>> names including "content_of_atmosphere_layer" are used. The construction
>> "atmosphere_mole_content_of_X" means the vertically integrated number of moles of X
>> above a unit area. The chemical formula for semi-heavy water is HDO, water with one
>> hydrogen replaced by deuterium.
>>
>> Note: This one is tricky, HDO is not D2O, so the correct term is not heavy water.
>> Open for suggestions here.
>>
>>
>> atmosphere_mole_content_of_nitrogen_dioxide
>> Canonical units: mol/m2
>> Description: "Content" indicates a quantity per unit area. The "atmosphere content"
>> of a quantity refers to the vertical integral from the surface to the top of the
>> atmosphere. For the content between specified levels in the atmosphere, standard
>> names including "content_of_atmosphere_layer" are used. The construction
>> "atmosphere_mole_content_of_X" means the vertically integrated number of moles of X
>> above a unit area. The chemical formula for nitrogen_dioxide is NO2.
>>
>> (References: troposphere_mole_content_of_nitrogen_dioxide,
>> stratosphere_mole_content_of_nitrogen_dioxide).
>
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Maarten Sneep
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Received on Fri Apr 06 2018 - 08:15:11 BST
