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 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. # 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 [email protected] Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Max-Planck-Straße 1 I 21502 Geesthacht I Deutschland/Germany Geschäftsführer/Board of Management: Prof. Dr. Wolfgang Kaysser, Dipl.-Ing. Michael Ganß Vorsitzender des Aufsichtsrates/Chairman of the Supervisory Board: Ministerialdirigent Dr. Herbert Zeisel Amtsgericht Lübeck HRB 285 GE (Register Court) Internet: http://www.hzg.de _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
