[CF-metadata] New standard names for atmospheric sea salt and for nitrogen deposition

Daniel Neumann daniel.neumann at io-warnemuende.de
Thu May 18 06:19:39 MDT 2017


Dear all,

I would like to propose a set of new standard names for atmospheric sea 
salt concentrations and for nitrogen deposition. I suggested them 
already in March - this is some kind of a reminder.

The suggested names are numbered and the reasons for suggesting these 
names are given below the list. The full descriptions are attached in 
the end of this e-mail.

suggested name, unit:
  ( 1) mass_concentration_of_pm10_seasalt_dry_aerosol_particles_in_air, 
kg m-3
  ( 2) 
mass_concentration_of_pm2p5_seasalt_cation_dry_aerosol_particles_in_air, 
kg m-3

  ( 3) 
mass_concentration_of_seasalt_cation_dry_aerosol_particles_in_air, kg m-3
  ( 4) mass_fraction_of_pm10_seasalt_cation_dry_aerosol_particles_in_air, 1
  ( 5) mass_fraction_of_pm2p5_seasalt_cation_dry_aerosol_particles_in_air, 1
  ( 6) atmosphere_mass_content_of_seasalt_cation_dry_aerosol_particles,
  ( 7) mass_fraction_of_seasalt_cation_dry_aerosol_particles_in_air, 1
  ( 8) 
mass_concentration_of_pm10_seasalt_cation_dry_aerosol_particles_in_air, 
kg m-3
  ( 9) 
mass_concentration_of_pm2p5_seasalt_cation_dry_aerosol_particles_in_air, 
kg m-3
  (10) mass_concentration_of_chloride_dry_aerosol_particles_in_air, kg m-3

  (11) mass_fraction_of_chloride_dry_aerosol_particles_in_air, 1
  (12) mole_concentration_of_chloride_in_air, mol m-3

  (13) 
tendency_of_atmosphere_mass_content_of_oxidized_nitrogen_due_to_deposition, 
kg m-2 s-1
  (14) 
tendency_of_atmosphere_mass_content_of_reduced_nitrogen_due_to_deposition, 
kg m-2 s-1
  (15) 
tendency_of_atmosphere_mass_content_of_oxidized_nitrogen_due_to_dry_deposition, 
kg m-2 s-1
  (16) 
tendency_of_atmosphere_mass_content_of_reduced_nitrogen_due_to_dry_deposition, 
kg m-2 s-1
  (17) 
tendency_of_atmosphere_mass_content_of_oxidized_nitrogen_due_to_wet_deposition, 
kg m-2 s-1
  (18) 
tendency_of_atmosphere_mass_content_of_reduced_nitrogen_due_to_wet_deposition, 
kg m-2 s-1

  (19) 
tendency_of_ocean_mole_content_of_reduced_nitrogen_due_to_deposition, 
mol m-2 s-1
  (20) 
tendency_of_ocean_mole_content_of_oxidized_nitrogen_due_to_deposition, 
mol m-2 s-1
  (21) 
tendency_of_ocean_mole_content_of_reduced_nitrogen_due_to_dry_deposition, 
mol m-2 s-1
  (22) 
tendency_of_ocean_mole_content_of_oxidized_nitrogen_due_to_dry_deposition, 
mol m-2 s-1
  (23) 
tendency_of_ocean_mole_content_of_reduced_nitrogen_due_to_wet_deposition, 
mol m-2 s-1
  (24) 
tendency_of_ocean_mole_content_of_oxidized_nitrogen_due_to_wet_deposition, 
mol m-2 s-1


Reason for (1) and (2): These standard names exist already as 
"mass_fraction" but not as "mass_concentration". However, the total mass 
(which we need to calculate the mass fraction) is not always known. 
Therefore, the mass_fraction might not be applicable in some situations.

Reason for (3) to (9): The mass of "seasalt_dry_aerosol_particles" is 
ambiguous. Providing the mass of "seasalt_cation_dry_aerosol_particles" 
is less ambiguous. At the time of emission, sea salt particles consist 
of Chloride, Sulfate, Sodium, and further cations with mass fractions 
each below 4%. When the sea salt ages and acids as nitric and sulfuric 
acid condense/form on the wet sea salt particles, chloride exporates as 
HCl (hydrochloric acid). Thus, the mass of the original sea salt ions 
decreases during aging. In the past, some chemistry transport models 
considered sea salt particles as one bulk species, which is no affected 
by this chloride displacement. Maybe some models still consider it as 
one. When sea salt is measured, commonly sodium and sometimes magnesium 
are considered as sea salt tracers, from which the original sea salt 
concentration is calculated. The same states for several modern 
chemistry transport models with speciated sea salt. Because atmospheric 
sea salt concentrations are commonly calculated on the base of cations 
(mainly sodium) and because these concentrations do not decrease, it 
might be better provide sea salt cation data instead of total sea salt 
data. It should be noted in a comment which species (which cations) are 
included and which mass ratios they have (see my suggestion for the 
description).

Reasons for (10) to (12): Currently, standard names only exist for some 
[cation]-chloride ion-compounds but not for chloride individually. When 
considering aged sea salt it might be intesting to have the chloride 
concentrations available.

Reason for (13) to (18): For marine ecosystem modelling, reduced and 
oxizied nitrogen compounds need to be distinguished. Atmospheric 
deposition is one source for marine nitrogen compounds.

Reason for (19) to (24): Consistency. New names (13) to (18) are for the 
output files of chemistry transport models, whereas (19) to (24) are for 
input files of marine biogeochemical models.


Regards,
Daniel


Fulll variable descriptions:

mass_concentration_of_pm10_seasalt_dry_aerosol_particles_in_air
kg m-3
Mass concentration means mass per unit volume and is used in the 
construction mass_concentration_of_X_in_Y, where X is a material 
constituent of Y. "Aerosol" means the system of suspended liquid or 
solid particles in air (except cloud droplets) and their carrier gas, 
the air itself. Aerosol particles take up ambient water (a process known 
as hygroscopic growth) depending on the relative humidity and the 
composition of the particles. "Dry aerosol particles" means aerosol 
particles without any water uptake. "Pm10 aerosol" denotes atmospheric 
particulate compounds with an aerodynamic diameter of less than or equal 
to 10 micrometers.

mass_concentration_of_pm2p5_seasalt_dry_aerosol_particles_in_air
kg m-3
Mass concentration means mass per unit volume and is used in the 
construction mass_concentration_of_X_in_Y, where X is a material 
constituent of Y. "Aerosol" means the system of suspended liquid or 
solid particles in air (except cloud droplets) and their carrier gas, 
the air itself. Aerosol particles take up ambient water (a process known 
as hygroscopic growth) depending on the relative humidity and the 
composition of the particles. "Dry aerosol particles" means aerosol 
particles without any water uptake. "Pm2.5 aerosol" denotes atmospheric 
particulate compounds with an aerodynamic diameter of less than or equal 
to 2.5 micrometers.

mass_concentration_of_seasalt_cation_dry_aerosol_particles_in_air
kg m-3
Mass concentration means mass per unit volume and is used in the 
construction mass_concentration_of_X_in_Y, where X is a material 
constituent of Y. "Aerosol" means the system of suspended liquid or 
solid particles in air (except cloud droplets) and their carrier gas, 
the air itself. Aerosol particles take up ambient water (a process known 
as hygroscopic growth) depending on the relative humidity and the 
composition of the particles. "Dry aerosol particles" means aerosol 
particles without any water uptake. "seasalt_cation" summarizes cationic 
sea salt componds. Depending on the model or the measurement, these are 
mainly sodium (Na+) but also potassium (K+), magnesium (Mg2+), calcium 
(Ca2+) and rarer cations. Where possible, the data variable should be 
accompanied by a complete description of the ions represented, for 
example, by using a comment attribute.

mass_fraction_of_pm10_seasalt_cation_dry_aerosol_particles_in_air
1
Mass fraction is used in the construction "mass_fraction_of_X_in_Y", 
where X is a material constituent of Y. It means the ratio of the mass 
of X to the mass of Y (including X). Aerosol particles take up ambient 
water (a process known as hygroscopic growth) depending on the relative 
humidity and the composition of the particles. "Aerosol" means the 
system of suspended liquid or solid particles in air (except cloud 
droplets) and their carrier gas, the air itself. "Dry aerosol particles" 
means aerosol particles without any water uptake. "Pm10 aerosol" is an 
air pollutant with an aerodynamic diameter of less than or equal to 10 
micrometers. "seasalt_cation" summarizes cationic sea salt componds. 
Depending on the model or the measurement, these are mainly sodium (Na+) 
but also potassium (K+), magnesium (Mg2+), calcium (Ca2+) and rarer 
cations. Where possible, the data variable should be accompanied by a 
complete description of the ions represented, for example, by using a 
comment attribute.

mass_fraction_of_pm2p5_seasalt_cation_dry_aerosol_particles_in_air
1
Mass fraction is used in the construction "mass_fraction_of_X_in_Y", 
where X is a material constituent of Y. It means the ratio of the mass 
of X to the mass of Y (including X). "Aerosol" means the system of 
suspended liquid or solid particles in air (except cloud droplets) and 
their carrier gas, the air itself. Aerosol particles take up ambient 
water (a process known as hygroscopic growth) depending on the relative 
humidity and the composition of the particles. "Dry aerosol particles" 
means aerosol particles without any water uptake. "Pm2p5 aerosol" is an 
air pollutant with an aerodynamic diameter of less than or equal to 2.5 
micrometers. "seasalt_cation" summarizes cationic sea salt componds. 
Depending on the model or the measurement, these are mainly sodium (Na+) 
but also potassium (K+), magnesium (Mg2+), calcium (Ca2+) and rarer 
cations. Where possible, the data variable should be accompanied by a 
complete description of the ions represented, for example, by using a 
comment attribute.

atmosphere_mass_content_of_seasalt_cation_dry_aerosol_particles
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. The mass is the total mass of the particles. "Aerosol" means the 
system of suspended liquid or solid particles in air (except cloud 
droplets) and their carrier gas, the air itself. Aerosol particles take 
up ambient water (a process known as hygroscopic growth) depending on 
the relative humidity and the composition of the particles. "Dry aerosol 
particle" means aerosol particles without any water uptake. 
"seasalt_cations" summarizes cationic sea salt componds. Depending on 
the model or the measurement, these are mainly sodium (Na+) but also 
potassium (K+), magnesium (Mg2+), calcium (Ca2+) and rarer cations. 
Where possible, the data variable should be accompanied by a complete 
description of the ions represented, for example, by using a comment 
attribute.

mass_fraction_of_seasalt_cation_dry_aerosol_particles_in_air
1
Mass fraction is used in the construction mass_fraction_of_X_in_Y, where 
X is a material constituent of Y. It means the ratio of the mass of X to 
the mass of Y (including X). "Aerosol" means the system of suspended 
liquid or solid particles in air (except cloud droplets) and their 
carrier gas, the air itself. Aerosol particles take up ambient water (a 
process known as hygroscopic growth) depending on the relative humidity 
and the composition of the particles. "Dry aerosol particles" means 
aerosol particles without any water uptake. "seasalt_cation" summarizes 
cationic sea salt componds. Depending on the model or the measurement, 
these are mainly sodium (Na+) but also potassium (K+), magnesium (Mg2+), 
calcium (Ca2+) and rarer cations. Where possible, the data variable 
should be accompanied by a complete description of the ions represented, 
for example, by using a comment attribute.

mass_concentration_of_pm10_seasalt_cation_dry_aerosol_particles_in_air
kg m-3
Mass concentration means mass per unit volume and is used in the 
construction mass_concentration_of_X_in_Y, where X is a material 
constituent of Y. "Aerosol" means the system of suspended liquid or 
solid particles in air (except cloud droplets) and their carrier gas, 
the air itself. Aerosol particles take up ambient water (a process known 
as hygroscopic growth) depending on the relative humidity and the 
composition of the particles. "Dry aerosol particles" means aerosol 
particles without any water uptake. "Pm10 aerosol" denotes atmospheric 
particulate compounds with an aerodynamic diameter of less than or equal 
to 10 micrometers. "seasalt_cation" summarizes cationic sea salt 
componds. Depending on the model or the measurement, these are mainly 
sodium (Na+) but also potassium (K+), magnesium (Mg2+), calcium (Ca2+) 
and rarer cations. Where possible, the data variable should be 
accompanied by a complete description of the ions represented, for 
example, by using a comment attribute.

mass_concentration_of_pm2p5_seasalt_cation_dry_aerosol_particles_in_air
kg m-3
Mass concentration means mass per unit volume and is used in the 
construction mass_concentration_of_X_in_Y, where X is a material 
constituent of Y. "Aerosol" means the system of suspended liquid or 
solid particles in air (except cloud droplets) and their carrier gas, 
the air itself. Aerosol particles take up ambient water (a process known 
as hygroscopic growth) depending on the relative humidity and the 
composition of the particles. "Dry aerosol particles" means aerosol 
particles without any water uptake. "Pm2p5 aerosol" denotes atmospheric 
particulate compounds with an aerodynamic diameter of less than or equal 
to 2.5 micrometers. "seasalt_cation" summarizes cationic sea salt 
componds. Depending on the model or the measurement, these are mainly 
sodium (Na+) but also potassium (K+), magnesium (Mg2+), calcium (Ca2+) 
and rarer cations. Where possible, the data variable should be 
accompanied by a complete description of the ions represented, for 
example, by using a comment attribute.

mass_concentration_of_chloride_dry_aerosol_particles_in_air
kg m-3
Mass concentration means mass per unit volume and is used in the 
construction mass_concentration_of_X_in_Y, where X is a material 
constituent of Y. A chemical species denoted by X may be described by a 
single term such as 'nitrogen' or a phrase such as 
'nox_expressed_as_nitrogen'. The chemical formula for chloride is Cl-.

mass_fraction_of_chloride_dry_aerosol_particles_in_air
1
Mass fraction is used in the construction mass_fraction_of_X_in_Y, 
whereX is a material constituent of Y. It means the ratio of the mass of 
X to the mass of Y (including X). A chemical species denoted by X may be 
described by a single term such as 'nitrogen' or a phrase such as 
'nox_expressed_as_nitrogen'. The chemical formula for chloride is Cl-.

mole_concentration_of_chloride_in_air
mol m-3
Mole concentration means number of moles per unit volume, also called 
"molarity", and is used in the construction 
mole_concentration_of_X_in_Y, where X is a material constituent of Y. A 
chemical species denoted by X may be described by a single term such as 
'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chemical 
formula for chloride is Cl-.
tendency_of_atmosphere_mass_content_of_oxidized_nitrogen_due_to_deposition
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. Usually, particle 
bound and gaseous nitrogen compounds, such as nitrogen monoxide (NO), 
nitrogen dioxide (NO2), dinitrogen pentoxide (N2O5), nitric acid (HNO3), 
nitrate (NO3-), peroxynitric acid (HNO4), 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_reduced_nitrogen_due_to_deposition
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. "reduced_nitrogen" 
summarizes all chemical species containing reduced nitrogen atoms. 
Usually, particle bound and gaseous nitrogen compounds, primarily 
ammonium (NH4+) and ammoina (NH3), 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_oxidized_nitrogen_due_to_dry_deposition
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. "oxidized_nitrogen" summarizes all chemical species containing 
oxidized nitrogen atoms. Usually, particle bound and gaseous nitrogen 
compounds, such as nitrogen monoxide (NO), nitrogen dioxide (NO2), 
dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrate (NO3-), 
peroxynitric acid (HNO4), 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_reduced_nitrogen_due_to_dry_deposition
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. "reduced_nitrogen" summarizes all chemical species containing 
reduced nitrogen atoms. Usually, particle bound and gaseous nitrogen 
compounds, primarily ammonium (NH4+) and ammoina (NH3), 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_oxidized_nitrogen_due_to_wet_deposition
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. "oxidized_nitrogen" 
summarizes all chemical species containing oxidized nitrogen atoms. 
Usually, particle bound and gaseous nitrogen compounds, such as nitrogen 
monoxide (NO), nitrogen dioxide (NO2), dinitrogen pentoxide (N2O5), 
nitric acid (HNO3), nitrate (NO3-), peroxynitric acid (HNO4), 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_reduced_nitrogen_due_to_wet_deposition
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. "reduced_nitrogen" 
summarizes all chemical species containing reduced nitrogen atoms. 
Usually, particle bound and gaseous nitrogen compounds, primarily 
ammonium (NH4+) and ammoina (NH3), 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_ocean_mole_content_of_reduced_nitrogen_due_to_deposition
mol m-2 s-1
"Content" indicates a quantity per unit area. The "ocean content" of a 
quantity refers to the vertical integral from the surface to the bottom 
of the ocean. "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 asingle term in a sum of 
terms which together compose the general quantity named by omitting the 
phrase. Deposition of nitrogen into the ocean is the sum of dry and wet 
deposition of the considered species onto the ocean surface from the 
atmosphere. "reduced_nitrogen" summarizes all chemical species 
containing reduced nitrogen atoms. Usually, particle bound and gaseous 
nitrogen compounds, primarily ammonium (NH4+) and ammoina (NH3), 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_ocean_mole_content_of_oxidized_nitrogen_due_to_deposition
mol m-2 s-1
"Content" indicates a quantity per unit area. The "ocean content" of a 
quantity refers to the vertical integral from the surface to the bottom 
of the ocean. "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 asingle term in a sum of 
terms which together compose the general quantity named by omitting the 
phrase. Deposition of nitrogen into the ocean is the sum of dry and wet 
deposition of the considered species onto the ocean surface from the 
atmosphere. "oxidized_nitrogen" summarizes all chemical species 
containing oxidized nitrogen atoms. Usually, particle bound and gaseous 
nitrogen compounds, such as nitrogen monoxide (NO), nitrogen dioxide 
(NO2), dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrate (NO3-), 
peroxynitric acid (HNO4), 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_ocean_mole_content_of_reduced_nitrogen_due_to_dry_deposition
mol m-2 s-1
"Content" indicates a quantity per unit area. The "ocean content" of a 
quantity refers to the vertical integral from the surface to the bottom 
of the ocean. "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 asingle 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 of the considered species onto the ocean surface 
from the atmosphere. "reduced_nitrogen" summarizes all chemical species 
containing reduced nitrogen atoms. Usually, particle bound and gaseous 
nitrogen compounds, primarily ammonium (NH4+) and ammoina (NH3), 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_ocean_mole_content_of_oxidized_nitrogen_due_to_dry_deposition
mol m-2 s-1
"Content" indicates a quantity per unit area. The "ocean content" of a 
quantity refers to the vertical integral from the surface to the bottom 
of the ocean. "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 asingle 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 of the considered species onto the ocean surface 
from the atmosphere. "oxidized_nitrogen" summarizes all chemical species 
containing oxidized nitrogen atoms. Usually, particle bound and gaseous 
nitrogen compounds, such as nitrogen monoxide (NO), nitrogen dioxide 
(NO2), dinitrogen pentoxide (N2O5), nitric acid (HNO3), nitrate (NO3-), 
peroxynitric acid (HNO4), 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_ocean_mole_content_of_reduced_nitrogen_due_to_wet_deposition
mol m-2 s-1
"Content" indicates a quantity per unit area. The "ocean content" of a 
quantity refers to the vertical integral from the surface to the bottom 
of the ocean. "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 asingle term in a sum of 
terms which together compose the general quantity named by omitting the 
phrase. "wet_deposition" means deposition by precipitation. 
"reduced_nitrogen" summarizes all chemical species containing reduced 
nitrogen atoms. Usually, particle bound and gaseous nitrogen compounds, 
primarily ammonium (NH4+) and ammoina (NH3), 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_ocean_mole_content_of_oxidized_nitrogen_due_to_wet_deposition
mol m-2 s-1
"Content" indicates a quantity per unit area. The "ocean content" of a 
quantity refers to the vertical integral from the surface to the bottom 
of the ocean. "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 asingle term in a sum of 
terms which together compose the general quantity named by omitting the 
phrase. "wet_deposition" means deposition by precipitation. 
"oxidized_nitrogen" summarizes all chemical species containing oxidized 
nitrogen atoms. Usually, particle bound and gaseous nitrogen compounds, 
such as nitrogen monoxide (NO), nitrogen dioxide (NO2), dinitrogen 
pentoxide (N2O5), nitric acid (HNO3), nitrate (NO3-), peroxynitric acid 
(HNO4), 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

Leibniz Institute for Baltic Sea Research Warnemuende
Physical Oceanography and Instrumentation
Seestrasse 15
18119 Rostock
Germany

phone:  +49-381-5197-287
fax:    +49-381-5197-114 or 440
e-mail: daniel.neumann at io-warnemuende.de




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