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[CF-metadata] New LUMIP variables

From: David Lawrence <dlawren>
Date: Thu, 29 Sep 2016 16:09:43 -0600

Thanks for your detailed assessment Jonathan,

Answers embedded below.

Thanks,

Dave

On Tue, Sep 27, 2016 at 7:37 AM, Jonathan Gregory <j.m.gregory at reading.ac.uk
> wrote:

> Dear Dave
>
> Thanks for the text listing of your proposals. Here are a few comments:
>
> These ones are existing standard names:
> surface_net_downward_mass_flux_of_carbon_dioxide_
> expressed_as_carbon_due_to_all_land_processes
> moisture_content_of_soil_layer
> soil_moisture_content
>
> OK. Alison Pamment suggested that we post these to the list, so I did,
but I think you are right.


> I see that there is already a standard name of surface_downward_water_flux.
> For consistency, I think the existing standard name should be changed (by
> alias) to surface_downward_mass_flux_of_water for consistency with your
> proposal
> surface_downward_mass_flux_of_water_due_to_crop_irrigation
> or yours should be changed to
> surface_downward_water_flux_due_to_crop_irrigation
>
> Changing our name to surface_downward_water_flux_due_to_crop_irrigation
is good.

* surface_upward_sensible_heat_flux_due_to_anthropogenic_energy_consumption
> In the definition you call this "anthropogenic heat flux". That sounds more
> general. Is it really an upward sensible heat flux specifically - no latent
> heat flux, for instance? Or do you mean the heat released per unit area and
> per unit time by anthropogenic energy use, no matter what happens to it?
>

Yes, this should be more general: surface_upward_heat_
flux_due_to_anthropogenic_energy_consumption

>
> * tendency_of_atmosphere_mass_content_of_carbon_due_to_
> emission_from_anthropogenic_product_pool
> Is this really carbon and not carbon_dioxide_expressed_as_carbon, like
> others? What is the difference between this and the existing standard name
> tendency_of_atmosphere_mass_content_of_carbon_dioxide_
> expressed_as_carbon_due_to_anthropogenic_emission
> Actually I don't know what "anthropogenic product pool" means. It isn't a
> phrase known to Google. Is there an alternative? Consequently I also don't
> understand this one
> carbon_mass_flux_into_anthropogenic_product_pools_
> due_to_land_use_land_cover_change
>
>
Anthropogenic product pools are carbon pools where carbon from wood or crop
harvest is put. I am not sure that there is a generally accepted term for
this, but anthropogenic product pools is commonly used and should be
understood (with the additional comments) by those in the land modeling
community. So, the term tendency_of_atmosphere_mass_
content_of_carbon_dioxide_expressed_as_carbon_due_to_anthropogenic_emission
would include tendency_of_atmosphere_mass_content_of_carbon_due_to_
emission_from_anthropogenic_product_pool as one of it's components. Agreed
about adding _of_carbon_dioxide_expressed_as_carbon to this standard name.


> * carbon_mass_flux_into_soil_or_litter_pools_due_to_land_use_
> land_cover_change
> I guess this should be ..._due_to_land_use_or_land_cover_change
>

Correct.


>
> * carbon_mass_flux_direct_to_atmosphere_due_to_land_use_land_cover_change
> By analogy with several existing names of the form
> surface_upward_mass_flux_of_carbon_dioxide_expressed_as_carbon_due_to_X
> could this one be
> surface_upward_mass_flux_of_carbon_dioxide_expressed_as_
> carbon_due_to_land_use_or_land_cover_change
>
>
Yes, if this is the common form, then that would be correct.


> * change_over_time_in_area_fraction
> It is OK for this to be change_over_time but would it be better as a rate
> i.e.
> tendency_of_area_fraction
> for which the canonical unit would be s-1? It could still be expressed as
> yr-1 so numerically the same.
>
> I think that this would be ok, especially if that is how other
area_fraction change variables are reported.


> Best wishes
>
> Jonathan
> _______________________________________________
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> CF-metadata at cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
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