Dear Daniel
Thanks for your proposal. I'm not an expert on the chemical aspect but it
make sense to me to have aggregated names for nitrogen. This would be the
mass of nitrogen in all species, yes?
"Total" is not needed because CF standard names assume that everything is
meant (as with nitrogen!) unless there is a qualification. In fact the phrase
due_to_deposition is already in use.
Best wishes
Jonathan
----- Forwarded message from Daniel.Neumann at hzg.de -----
> Date: Wed, 10 Aug 2016 08:36:06 +0200
> From: Daniel.Neumann at hzg.de
> To: cf-metadata at cgd.ucar.edu
> Subject: [CF-metadata] Proposal to introduce three new standard names for
> nitrogen deposition
>
> Dear CF-convention community,
>
> I would like to propose three new standard names for nitrogen deposition.
>
> Regards,
> Daniel
>
>
> ## PROPOSED STANDARD NAMES ##
> 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_total_deposition
>
>
> ## REASON ##
> 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 'total 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 'total oxidized nitrogen deposition' (noy + nitrate) or 'total reduced nitrogen deposition' (ammonia + ammonium).
>
>
> ## DESCRIPTION ##
> # DRY DEPOSITION #
> "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.
>
>
> # WET DEPOSITION #
> "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 nota
bly 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.
>
>
> # TOTAL DEPOSITION #
> "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. "total_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.
>
>
>
>
>
> ----------------------------
> Daniel Neumann
> Doktorand Chemietransportmodellierung
> PhD Student Chemistry Transport Modelling
>
> Tel.: +49 (0) 41 52 / 87 - 2368
> Fax: +49 (0) 41 52 / 87 - 2332
> daniel.neumann at hzg.de
> Helmholtz-Zentrum Geesthacht
> Zentrum f?r Material- und K?stenforschung GmbH
> Max-Planck-Stra?e 1 I 21502 Geesthacht I Deutschland/Germany
>
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----- End forwarded message -----
Received on Wed Aug 10 2016 - 06:44:38 BST
