Dear Maarten,
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."
sincerely,
Martin Juckes
________________________________
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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Received on Fri Apr 06 2018 - 08:02:43 BST
