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).

Kind regards,

Maarten Sneep
-- 
KNMI
T: 030 2206747
E: maarten.sn...@knmi.nl
R: A2.14
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