Hi everyone, John is making a good point: there are multiple CF standard_names already that go like "downward_..._flux_...", in contrast to the "sinking_..._flux_..." ones that I found.
Should we eliminate one? I have no preference and ask everybody who does to chime in. I can see the benefits of having just one of the two wordings, but do not really care which one. Matthias > Date: Wed, 9 Oct 2013 17:17:21 -0700 > From: John Graybeal <[email protected]> > To: CF Metadata List <[email protected]>, OceanSITES Data > Management Team <[email protected]> > Subject: Re: [CF-metadata] standard names for sediment trap data > Message-ID: <[email protected]> > Content-Type: text/plain; charset=us-ascii > > Hi Matthias! I support the direction of this request. > > I note the resemblance to the 'downward_mass_flux_...' standard names > recently requested, and I have assumed that phrase is a common CF way of > saying the same thing. (Oddly, I missed the sinking_ ones when > formulating my request.) > > Perhaps we should see if one or the other is more dominant and move toward > a single phrasing? > > With regard to units, I think the list would say 'request what you use and > need'. Some people will measure mole_flux, some will measure mass_flux. > (No?) > > John > > On Oct 9, 2013, at 16:16, Matthias Lankhorst <[email protected]> wrote: > > Dear CF community, > > > > > > > > in the OceanSITES project, we would like to publish data from sediment > > traps in files, using the CF conventions. Sediment traps are devices > > moored underwater in the ocean, which collect sinking particles > > (detritus) in a funnel and into sample bottles for later analyses. > > Analyses can be done for a variety of substances. It looks like we need > > a few more standard names for these, and possibly a discussion whether > > some of them should be expressed as mass fluxes or as substance amount > > (mole) fluxes. > > > > > > > > I noticed that CF already has these standard names, all as mole fluxes > > with > > > > canonical units of mol m-2 s-1: > > > > > > sinking_mole_flux_of_aragonite_expressed_as_carbon_in_sea_water > > sinking_mole_flux_of_calcite_expressed_as_carbon_in_sea_water > > sinking_mole_flux_of_particulate_iron_in_sea_water > > sinking_mole_flux_of_particulate_organic_matter_expressed_as_carbon_in_se > > a_water sinking_mole_flux_of_particulate_organic_nitrogen_in_sea_water > > sinking_mole_flux_of_particulate_organic_phosphorus_in_sea_water > > sinking_mole_flux_of_particulate_silicon_in_sea_water > > > > > > > > Here is the list of quantities that we need to address in OceanSITES. My > > initial proposal is to introduce them all as mass fluxes with canonical > > units of kg m-2 s-1. If we should rather go with mole fluxes like the > > ones above, please chime in. > > > > > > > > Total/organic mass: > > Propose new standard names: > > sinking_mass_flux_of_particulate_matter_in_sea_water > > sinking_mass_flux_of_particulate_organic_matter_in_sea_water > > (I suppose these are understood as dry mass, i.e. weighed after water > > has evaporated.) > > > > > > > > Particulate organic, inorganic, total carbon: > > Propose new standard names: > > sinking_mass_flux_of_particulate_organic_carbon_in_sea_water > > sinking_mass_flux_of_particulate_inorganic_carbon_in_sea_water > > sinking_mass_flux_of_particulate_carbon_in_sea_water > > (or should we include "total" somewhere in the latter?) > > > > > > > > Particulate organic, inorganic, total nitrogen: > > Propose new standard names: > > sinking_mass_flux_of_particulate_organic_nitrogen_in_sea_water > > sinking_mass_flux_of_particulate_inorganic_nitrogen_in_sea_water > > sinking_mass_flux_of_particulate_nitrogen_in_sea_water > > (or should we include "total" somewhere in the latter?) > > > > > > > > Other particulate substances from a list: > > Propose new standard names for each of the following, to be constructed > > as: sinking_mass_flux_of_particulate_XXX_in_sea_water, > > where XXX is: > > - aluminum > > - iron > > - phosphorous > > - silica > > - biogenic_silica > > - lithogenic_silica > > - calcium > > - titanium > > - manganese > > - barium > > - magnesium > > > > > > > > Your expert comments are highly appreciated! > > > > > > > > Respectfully, Matthias > > > > > > > > > > -- > > _______________________________________ > > > > > > > > Dr. Matthias Lankhorst > > Scripps Institution of Oceanography > > 9500 Gilman Drive, Mail Code 0230 > > La Jolla, CA 92093-0230 > > USA > > > > > > > > Phone: +1 858 822 5013 > > Fax: +1 858 534 9820 > > E-Mail: [email protected] > > http://www-pord.ucsd.edu/~mlankhorst/ > > _______________________________________________ > > CF-metadata mailing list > > [email protected] > > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > ------------------------------------ > John Graybeal > Senior Data Manager, Metadata and Semantics > > T +1 (408) 675-5545 > F +1 (408) 616-1626 > skype: graybealski > > Marinexplore > 920 Stewart Drive > Sunnyvale, CA -- _______________________________________ Dr. Matthias Lankhorst Scripps Institution of Oceanography 9500 Gilman Drive, Mail Code 0230 La Jolla, CA 92093-0230 USA Phone: +1 858 822 5013 Fax: +1 858 534 9820 E-Mail: [email protected] http://www-pord.ucsd.edu/~mlankhorst/ _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
