Dear Martin and Jonathan,
Thank you both for commenting again on these names.
Martin wrote:
> (a) carbon_dioxide vs. 13C_dioxide: I agree that carbon_dioxide is correct
> and clearer;
Thank you. This comment affects proposals 6 - 13 listed below.
6. CMIP6 short name netAtmosLandC13Flux.
Follows from existing name
surface_net_downward_mass_flux_of_carbon_dioxide_expressed_as_carbon_due_to_all_land_processes
surface_net_downward_mass_flux_of_13C_dioxide_expressed_as_13C_due_to_all_land_processes
(kg m-2 s-1) I.e. the mass of 13C in the downward CO2 flux.
We are now agreed on the following:
surface_net_downward_mass_flux_of_carbon_dioxide_expressed_as_13C_due_to_all_land_processes
(kg m-2 s-1)
'The surface called "surface" means the lower boundary of the atmosphere.
"Downward" indicates a vector component which is positive when directed
downward (negative upward). Net downward radiation is the difference between
radiation from above (downwelling) and radiation from below (upwelling). In
accordance with common usage in geophysical disciplines, "flux" implies per
unit area, called "flux density" in physics. The phrase "expressed_as" is used
in the construction A_expressed_as_B, where B is a chemical constituent of A.
It means that the quantity indicated by the standard name is calculated solely
with respect to the B contained in A, neglecting all other chemical
constituents of A. The chemical formula for carbon dioxide is CO2. "C" means
the element carbon and "13C" is the stable isotope "carbon-13", having six
protons and seven neutrons. 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 wh
ich together compose the general quantity named by omitting the phrase. "All
land processes" means plant and soil respiration, photosynthesis, animal
grazing, crop harvesting, natural fires and anthropogenic land use change.
"Anthropogenic land use change" means human changes to land, excluding forest
regrowth. It includes fires ignited by humans for the purpose of land use
change and the processes of eventual disposal and decomposition of wood
products such as paper, cardboard, furniture and timber for construction.'
This name is accepted for publication in the standard name table and will be
added in the May update.
7. CMIP6 short name netAtmosLandC14Flux.
As (6), but for 14C
surface_net_downward_mass_flux_of_14C_dioxide_expressed_as_14C_due_to_all_land_processes
(kg m-2 s-1)
We are now agreed on the following:
surface_net_downward_mass_flux_of_carbon_dioxide_expressed_as_14C_due_to_all_land_processes
(kg m-2 s-1)
'The surface called "surface" means the lower boundary of the atmosphere.
"Downward" indicates a vector component which is positive when directed
downward (negative upward). Net downward radiation is the difference between
radiation from above (downwelling) and radiation from below (upwelling). In
accordance with common usage in geophysical disciplines, "flux" implies per
unit area, called "flux density" in physics. The phrase "expressed_as" is used
in the construction A_expressed_as_B, where B is a chemical constituent of A.
It means that the quantity indicated by the standard name is calculated solely
with respect to the B contained in A, neglecting all other chemical
constituents of A. The chemical formula for carbon dioxide is CO2. "C" means
the element carbon and "14C" is the radioactive isotope "carbon-14", having six
protons and eight neutrons and used in radiocarbon dating. The specification of
a physical process by the phrase "due_to_" process means that the quantity
named i
s a single term in a sum of terms which together compose the general quantity
named by omitting the phrase. "All land processes" means plant and soil
respiration, photosynthesis, animal grazing, crop harvesting, natural fires and
anthropogenic land use change. "Anthropogenic land use change" means human
changes to land, excluding forest regrowth. It includes fires ignited by humans
for the purpose of land use change and the processes of eventual disposal and
decomposition of wood products such as paper, cardboard, furniture and timber
for construction.'
This name is accepted for publication in the standard name table and will be
added in the May update.
8. CMIP6 short name rac13. Mass Flux of 13C into Atmosphere due to Autotrophic
(Plant) Respiration on Land.
As
surface_upward_mass_flux_of_carbon_dioxide_expressed_as_carbon_due_to_plant_respiration,
but for 13C
surface_upward_mass_flux_of_13C_dioxide_expressed_as_13C_due_to_plant_respiration
(kg m-2 s-1)
We are now agreed on the following:
surface_upward_mass_flux_of_carbon_dioxide_expressed_as_13C_due_to_plant_respiration
(kg m-2 s-1)
'The surface called "surface" means the lower boundary of the atmosphere.
"Upward" indicates a vector component which is positive when directed upward
(negative downward). In accordance with common usage in geophysical
disciplines, "flux" implies per unit area, called "flux density" in physics.
The phrase "expressed_as" is used in the construction A_expressed_as_B, where B
is a chemical constituent of A. It means that the quantity indicated by the
standard name is calculated solely with respect to the B contained in A,
neglecting all other chemical constituents of A. The chemical formula for
carbon dioxide is CO2. "C" means the element carbon and "13C" is the stable
isotope "carbon-13", having six protons and seven neutrons. 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. Plant respiration is the sum of
respiration by parts
of plants both above and below the soil. It is assumed that all the respired
carbon dioxide is emitted to the atmosphere. The term "plants" refers to the
kingdom of plants in the modern classification which excludes fungi. Plants are
autotrophs i.e. "producers" of biomass using carbon obtained from carbon
dioxide.'
This name is accepted for publication in the standard name table and will be
added in the May update.
9. CMIP6 short name rac14. Mass Flux of 14C into Atmosphere due to Autotrophic
(Plant) Respiration on Land
surface_upward_mass_flux_of_14C_dioxide_expressed_as_14C_due_to_plant_respiration
(kg m-2 s-1)
We are now agreed on the following:
surface_upward_mass_flux_of_carbon_dioxide_expressed_as_14C_due_to_plant_respiration
(kg m-2 s-1)
'The surface called "surface" means the lower boundary of the atmosphere.
"Upward" indicates a vector component which is positive when directed upward
(negative downward). In accordance with common usage in geophysical
disciplines, "flux" implies per unit area, called "flux density" in physics.
The phrase "expressed_as" is used in the construction A_expressed_as_B, where B
is a chemical constituent of A. It means that the quantity indicated by the
standard name is calculated solely with respect to the B contained in A,
neglecting all other chemical constituents of A. The chemical formula for
carbon dioxide is CO2. "C" means the element carbon and "14C" is the
radioactive isotope "carbon-14", having six protons and eight neutrons and used
in radiocarbon dating. 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.
Plant respiratio
n is the sum of respiration by parts of plants both above and below the soil.
It is assumed that all the respired carbon dioxide is emitted to the
atmosphere. The term "plants" refers to the kingdom of plants in the modern
classification which excludes fungi. Plants are autotrophs i.e. "producers" of
biomass using carbon obtained from carbon dioxide.'
This name is accepted for publication in the standard name table and will be
added in the May update.
10. CMIP6 short name rhc13. Mass Flux of 13C into Atmosphere due to
Heterotrophic Respiration on Land
surface_upward_mass_flux_of_13C_dioxide_expressed_as_13C_due_to_heterotrophic_respiration
(kg m-2 s-1)
We are now agreed on the following:
surface_upward_mass_flux_of_carbon_dioxide_expressed_as_13C_due_to_heterotrophic_respiration
(kg m-2 s-1)
'The surface called "surface" means the lower boundary of the atmosphere.
"Upward" indicates a vector component which is positive when directed upward
(negative downward). In accordance with common usage in geophysical
disciplines, "flux" implies per unit area, called "flux density" in physics.
The phrase "expressed_as" is used in the construction A_expressed_as_B, where B
is a chemical constituent of A. It means that the quantity indicated by the
standard name is calculated solely with respect to the B contained in A,
neglecting all other chemical constituents of A. The chemical formula for
carbon dioxide is CO2. "C" means the element carbon and "13C" is the stable
isotope "carbon-13", having six protons and seven neutrons. 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. Heterotrophic respiration is respiration
by heterotr
ophs ("consumers"), which are organisms (including animals and decomposers)
that consume other organisms or dead organic material, rather than synthesising
organic material from inorganic precursors using energy from the environment
(especially sunlight) as autotrophs ("producers") do. Heterotrophic respiration
goes on within both the soil and litter pools.'
This name is accepted for publication in the standard name table and will be
added in the May update.
11. CMIP6 short name rhc14 : Mass Flux of 14C into Atmosphere due to
Heterotrophic Respiration on Land
surface_upward_mass_flux_of_14C_dioxide_expressed_as_14C_due_to_heterotrophic_respiration
(kg m-2 s-1)
We are now agreed on the following:
surface_upward_mass_flux_of_carbon_dioxide_expressed_as_14C_due_to_heterotrophic_respiration
(kg m-2 s-1)
'The surface called "surface" means the lower boundary of the atmosphere.
"Upward" indicates a vector component which is positive when directed upward
(negative downward). In accordance with common usage in geophysical
disciplines, "flux" implies per unit area, called "flux density" in physics.
The phrase "expressed_as" is used in the construction A_expressed_as_B, where B
is a chemical constituent of A. It means that the quantity indicated by the
standard name is calculated solely with respect to the B contained in A,
neglecting all other chemical constituents of A. The chemical formula for
carbon dioxide is CO2. "C" means the element carbon and "14C" is the
radioactive isotope "carbon-14", having six protons and eight neutrons and used
in radiocarbon dating. 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.
Heterotrophic re
spiration is respiration by heterotrophs ("consumers"), which are organisms
(including animals and decomposers) that consume other organisms or dead
organic material, rather than synthesising organic material from inorganic
precursors using energy from the environment (especially sunlight) as
autotrophs ("producers") do. Heterotrophic respiration goes on within both the
soil and litter pools.'
This name is accepted for publication in the standard name table and will be
added in the May update.
Martin wrote:
> (b) surface_upward_mass_flux_of_nitrogen_compounds_expressed_as_nitrogen: I
> selected the shorter form (surface_upward_mass_flux_of_nitrogen) for
> consistency with terms such as "stem_mass_content_of_nitrogen", but I'm
> happy to go with the longer form if it is considered necessary;
Okay, thank you. I think it is better to make this name match the other
mass_flux ones. It seems we are agreed on
18. CMIP6 short name fNgas : Total Nitrogen lost to the atmosphere (sum of NHx,
NOx, N2O, N2)
surface_upward_mass_flux_of_nitrogen_compounds_expressed_as_nitrogen (kg m-2
s-1)
'The surface called "surface" means the lower boundary of the atmosphere.
"Upward" indicates a vector component which is positive when directed upward
(negative downward). In accordance with common usage in geophysical
disciplines, "flux" implies per unit area, called "flux density" in physics.
The phrase "expressed_as" is used in the construction A_expressed_as_B, where B
is a chemical constituent of A. It means that the quantity indicated by the
standard name is calculated solely with respect to the B contained in A,
neglecting all other chemical constituents of A. "Nitrogen compounds"
summarizes all chemical species containing nitrogen atoms. 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.'
This name is accepted for publication in the standard name table and will be
added in the May update.
I think we have now agreed all the PMIP carbon and nitrogen names. Thank you!
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065
NCAS/Centre for Environmental Data Archival Email: [email protected]
STFC Rutherford Appleton Laboratory
R25, 2.22
Harwell Oxford, Didcot, OX11 0QX, U.K.
From: Juckes, Martin (STFC,RAL,RALSP)
Sent: 04 May 2018 15:34
To: Pamment, Alison (STFC,RAL,RALSP) <[email protected]>; 'Jonathan
Gregory' <[email protected]>; [email protected]
Subject: Re: [CF-metadata] PMIP (including 1 or more that originated in C4MIP)
Standard Names: Carbon and Nitrogen terms
Dear Jonathan, Alison,
(a) carbon_dioxide vs. 13C_dioxide: I agree that carbon_dioxide is correct and
clearer;
(b) surface_upward_mass_flux_of_nitrogen_compounds_expressed_as_nitrogen: I
selected the shorter form (surface_upward_mass_flux_of_nitrogen) for
consistency with terms such as "stem_mass_content_of_nitrogen", but I'm happy
to go with the longer form if it is considered necessary;
(c) mass_content: thanks for spotting the error,
regards,
Martin
________________________________________
From: CF-metadata on behalf of Alison Pamment - UKRI STFC
Sent: 04 May 2018 14:27
To: 'Jonathan Gregory'; mailto:[email protected]
Subject: Re: [CF-metadata] PMIP (including 1 or more that originated in C4MIP)
Standard Names: Carbon and Nitrogen terms
Dear Jonathan,
Well spotted! I think they should all say 'mass_content'. So we should have
nitrogen_mass_content_of_forestry_and_agricultural_products (kg m-2) for
nProduct
soil_mass_content_of_nitrogen (kg m-2) for nSoil.
I will update them in the standard names editor. They will still be published
in the May update.
In the last update I made some aliases for carbon content names and I've just
realised I missed one:
vegetation_carbon_content -> vegetation_mass_content_of_carbon (kg m-2).
I'll add this one into the May update.
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065
NCAS/Centre for Environmental Data Archival Email:
mailto:[email protected]
STFC Rutherford Appleton Laboratory
R25, 2.22
Harwell Oxford, Didcot, OX11 0QX, U.K.
-----Original Message-----
From: CF-metadata [mailto:[email protected]] On Behalf Of
Jonathan Gregory
Sent: 04 May 2018 13:39
To: mailto:[email protected]
Subject: Re: [CF-metadata] PMIP (including 1 or more that originated in C4MIP)
Standard Names: Carbon and Nitrogen terms
Dear Alison
Yes, I agree with Martin's 13C and 14C names, which I queried. I also agree
with you about nitrogen_compounds_expressed_as_nitrogen.
Reading through this list, I compared these:
> litter_mass_content_of_nitrogen (kg m-2)
> nitrogen_content_of_forestry_and_agricultural_products (kg m-2)
> (kg m-2) vegetation_mass_content_of_nitrogen (kg
> m-2)
Why do two of them have mass_content and two just content?
Best wishes
Jonathan
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