[CF-metadata] Proposal to introduce three new standard names for nitrogen deposition

alison.pamment at stfc.ac.uk alison.pamment at stfc.ac.uk
Wed Feb 8 06:21:32 MST 2017


Dear Daniel,

Many thanks for your proposals and sorry for the delay in responding.

I agree with Jonathan's comments that the names look fine. Using the unqualified term 'nitrogen' to mean all nitrogen species in the atmosphere is definitely the right approach. Thank you also for providing such complete descriptions which I think are entirely consistent with those of existing standard names.

The following three names are accepted for publication in the standard name table and will be included in the February update.

tendency_of_atmosphere_mass_content_of_nitrogen_due_to_dry_deposition (canonical units: kg m-2 s-1)
' "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. "tendency_of_X" means derivative of X with respect to time. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "dry_deposition" is the sum of turbulent deposition and gravitational settling. "Nitrogen" summarizes all chemical species containing nitrogen atoms. Usually, particle bound and gaseous nitrogen compounds, such as atomic nitrogen (N), nitrogen monoxide (NO), nitrogen dioxide (NO2), dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrage (NO3-), peroxynitric acid (HNO4), ammoina (NH3), ammonium (NH4+), bromine nitrate (BrONO2), chlorine nitrate (ClONO2) and organic nitrates (most notably peroxyacetyl nitrate, sometimes referred to as PAN, (CH3COO2NO2)) are included. The list of individual species that are included in this quantity can vary between models. Where possible, the data variable should be accompanied by a complete description of the species represented, for example, by using a comment attribute.'

tendency_of_atmosphere_mass_content_of_nitrogen_due_to_wet_deposition (canonical units: kg m-2 s-1)
' "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. "tendency_of_X" means derivative of X with respect to time. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "wet_deposition" means deposition by precipitation. "Nitrogen" summarizes all chemical species containing nitrogen atoms. Usually, particle bound and gaseous nitrogen compounds, such as atomic nitrogen (N), nitrogen monoxide (NO), nitrogen dioxide (NO2), dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrage (NO3-), peroxynitric acid (HNO4), ammoina (NH3), ammonium (NH4+), bromine nitrate (BrONO2), chlorine nitrate (ClONO2) and organic nitrates (most notably peroxyacetyl nitrate, sometimes referred to as PAN, (CH3COO2NO2)) are included. The list of individual species that are included in this quantity can vary between models. Where possible, the data variable should be accompanied by a complete description of the species represented, for example, by using a comment attribute.'

tendency_of_atmosphere_mass_content_of_nitrogen_due_to_deposition (canonical units: kg m-2 s-1)
' "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. "tendency_of_X" means derivative of X with respect to time. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "Deposition" is the sum of wet and dry deposition. "Nitrogen" summarizes all chemical species containing nitrogen atoms. Usually, particle bound and gaseous nitrogen compounds, such as atomic nitrogen (N), nitrogen monoxide (NO), nitrogen dioxide (NO2), dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrage (NO3-), peroxynitric acid (HNO4), ammoina (NH3), ammonium (NH4+), bromine nitrate (BrONO2), chlorine nitrate (ClONO2) and organic nitrates (most notably peroxyacetyl nitrate, sometimes referred to as PAN, (CH3COO2NO2)) are included. The list of individual species that are included in this quantity can vary between models. Where possible, the data variable should be accompanied by a complete description of the species represented, for example, by using a comment attribute.'

Best wishes,
Alison

------
Alison Pamment                                                       Tel: +44 1235 778065
Centre for Environmental Data Analysis         Email: alison.pamment at stfc.ac.uk
STFC Rutherford Appleton Laboratory     
R25, 2.22
Harwell Campus, Didcot, OX11 0QX, U.K.



> -----Original Message-----
> From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of
> Daniel.Neumann at hzg.de
> Sent: 13 December 2016 14:42
> To: cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] Proposal to introduce three new standard names for
> nitrogen deposition
> 
> Dear all,
> 
> I handed in a proposal for three new standard names for nitrogen deposition.
> After Jonathan's reply there was no further feedback. Therefore, I would like to
> bring this proposal back to your attention and - if there are no objections - to
> the official proposal list.
> 
> The proposed standard names were
> tendency_of_atmosphere_mass_content_of_nitrogen_due_to_dry_deposition
> tendency_of_atmosphere_mass_content_of_nitrogen_due_to_wet_deposition
> tendency_of_atmosphere_mass_content_of_nitrogen_due_to_deposition
> 
> The reason was:
> The total nitrogen deposition into water bodies is an important parameter when
> Eutrophication of water bodies and nutrient contribution from rivers and the
> atmosphere are evaluated. This parameter is no primary model output
> parameter but it is derived from the deposition of all nitrogen compounds.
> When providing nitrogen deposition data to ecosystem modelers it is
> reasonable to provide 'nitrogen deposition' instead of 'nitrogen wet deposition'
> and 'nitrogen dry deposition' separately because algae do not care about the
> type of deposition.
> Instead of providing "total nitrogen deposition" one could also provide wet and
> dry deposition of "ammonium + ammonia + noy + nitrate". However, this yields
> files that are eight times as height as necessary.
> Therefore, standard names for nitrogen wet, dry and total deposition should be
> introduced.
> 
> It might be debatable to also introduce standard names for 'oxidized nitrogen
> deposition' (noy + nitrate) or 'reduced nitrogen deposition' (ammonia +
> ammonium). This would mean 9 nine standard names ([wet, dry, total] x
> [reduced, oxidized, total]). I would interested on you feedback on that option.
> 
> Please find the exact descriptions and units below.
> 
> Cheers,
> Daniel
> 
> 
> 1)
> standard name:
> tendency_of_atmosphere_mass_content_of_nitrogen_due_to_dry_deposition
> 
> unit:
> kg m-2 s-1
> 
> 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.
> "tendency_of_X" means derivative of X with respect to time. The specification
> of a physical process by the phrase "due_to_" process means that the quantity
> named is a single term in a sum of terms which together compose the general
> quantity named by omitting the phrase. "dry_deposition" is the sum of turbulent
> deposition and gravitational settling. "Nitrogen" summarizes all chemical
> species containing nitrogen atoms. Usually, particle bound and gaseous
> nitrogen compounds, such as atomic nitrogen (N), nitrogen monoxide (NO),
> nitrogen dioxide (NO2), dinitrogen pentoxide (N2O5), nitric acid (HNO3),
> nitrage (NO3-), peroxynitric acid (HNO4), ammoina (NH3), ammonium (NH4+),
> bromine nitrate (BrONO2), chlorine nitrate (ClONO2) and organic nitrates (most
> notably peroxyacetyl nitrate, sometimes referred to as PAN, (CH3COO2NO2))
> are included. The list of individual species that are included in this quantity can
> vary between models. Where possible, the data variable should be
> accompanied by a complete description of the species represented, for
> example, by using a comment attribute.
> 
> 
> 2)
> standardname:
> tendency_of_atmosphere_mass_content_of_nitrogen_due_to_wet_deposition
> 
> unit:
> kg m-2 s-1
> 
> 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.
> "tendency_of_X" means derivative of X with respect to time. The specification
> of a physical process by the phrase "due_to_" process means that the quantity
> named is a single term in a sum of terms which together compose the general
> quantity named by omitting the phrase. "wet_deposition" means deposition by
> precipitation. "Nitrogen" summarizes all chemical species containing nitrogen
> atoms. Usually, particle bound and gaseous nitrogen compounds, such as
> atomic nitrogen (N), nitrogen monoxide (NO), nitrogen dioxide (NO2),
> dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrage (NO3-), peroxynitric
> acid (HNO4), ammoina (NH3), ammonium (NH4+), bromine nitrate (BrONO2),
> chlorine nitrate (ClONO2) and organic nitrates (most notably peroxyacetyl
> nitrate, sometimes referred to as PAN, (CH3COO2NO2)) are included. The list
> of individual species that are included in this quantity can vary between
> models. Where possible, the data variable should be accompanied by a
> complete description of the species represented, for example, by using a
> comment attribute.
> 
> 
> 3)
> standardname:
> tendency_of_atmosphere_mass_content_of_nitrogen_due_to_deposition
> 
> unit:
> kg m-2 s-1
> 
> 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.
> "tendency_of_X" means derivative of X with respect to time. The specification
> of a physical process by the phrase "due_to_" process means that the quantity
> named is a single term in a sum of terms which together compose the general
> quantity named by omitting the phrase. "deposition" is the sum of wet and dry
> deposition. "Nitrogen" summarizes all chemical species containing nitrogen
> atoms. Usually, particle bound and gaseous nitrogen compounds, such as
> atomic nitrogen (N), nitrogen monoxide (NO), nitrogen dioxide (NO2),
> dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrage (NO3-), peroxynitric
> acid (HNO4), ammoina (NH3), ammonium (NH4+), bromine nitrate (BrONO2),
> chlorine nitrate (ClONO2) and organic nitrates (most notably peroxyacetyl
> nitrate, sometimes referred to as PAN, (CH3COO2NO2)) are included. The list
> of individual species that are included in this quantity can vary between
> models. Where possible, the data variable should be accompanied by a
> complete description of the species represented, for example, by using a
> comment attribute.
> 
> 




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