Hi again,
I think all you need for the second Standard Name is: moles_of_silicate_per_unit_area_in_seabed_sediment as there is one atom of silicon per molecule of any of the species making up 'silicate'. You only really need 'expressed_as_silicon' for 'mass_of_silicate'. Cheers, Roy. I am retiring on 31/05/2018 but will continue to be active through an Emeritus Fellowship using this e-mail address. ________________________________ From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Daniel Neumann <daniel.neum...@io-warnemuende.de> Sent: 17 May 2018 19:58 To: cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] No standard names for element concentrations in sediment? Great :-) . Then I would like to propose the following two new standard names: moles_of_nitrogen_per_unit_area_in_seabed_sediment unit: mol/m2 description: moles_of_X_per_unit_area_in_Y describes the amount of X in a column with unity base area of material/compartment Y. 'Sediment' means particulate matter bound at the sea floor. Information on the location of the interface between water column and sediment can be provided via the comment attribute. and moles_of_silicate_expressed_as_silicon_per_unit_area_in_seabed_sediment unit: mol/m2 description: moles_of_X_per_unit_area_in_Y describes the amount of X in a column with unity base area of material/compartment Y. 'Sediment' means particulate matter bound at the sea floor. Information on the location of the interface between water column and sediment can be provided via the comment attribute. Cheers, Daniel On 17.05.2018 16:00, Lowry, Roy K. wrote: Hi Daniel, That works for me. Cheers, Roy. I am retiring on 31/05/2018 but will continue to be active through an Emeritus Fellowship using this e-mail address. ________________________________ From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu><mailto:cf-metadata-boun...@cgd.ucar.edu> on behalf of Daniel Neumann <daniel.neum...@io-warnemuende.de><mailto:daniel.neum...@io-warnemuende.de> Sent: 17 May 2018 10:41 To: CF Metadata Mail List Subject: Re: [CF-metadata] No standard names for element concentrations in sediment? Dear Roy, Dear Jonathan, Thank you for the feedback. I see that sediment might be ambiguous. Would "seabed sediment" or "marine seabed sediment" be an acceptable alternative? moles_of_nitrogen_per_unit_area_in_seabed_sediment This would clarify that the sea floor is meant as location of the sediment. It would also clarify that not bare rock is meant. Cheers, Daniel On 16.05.2018 11:42, Lowry, Roy K. wrote: Thanks Daniel, Couple of additional thoughts that struck me. Is there possibility of confusion between seafloor sediment and suspended sediment? What if the seabed was bare rock? So, might: moles_of_nitrogen_per_unit_area_in_seabed be better? Let’s see if we get any other thoughts on the list. Cheers, Roy. From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu><mailto:cf-metadata-boun...@cgd.ucar.edu> On Behalf Of Daniel Neumann Sent: 16 May 2018 09:28 To: CF Metadata Mail List <cf-metadata@cgd.ucar.edu><mailto:cf-metadata@cgd.ucar.edu> Subject: Re: [CF-metadata] No standard names for element concentrations in sediment? Dear Roy, > I think benthos chemistry is virgin territory for CF - not really surprising > for a standard that started in the atmosphere before dipping its toes in the > ocean. :-) > I'm presuming your coming from a modelling perspective, Yes In our current model setup (ecosystem model of the water column) we have a fairly simple sediment and write out the nitrogen amount per m2. This name might be appropriate for this purpose: moles_of_nitrogen_per_unit_area_in_sediment unit: mol/m2 description: moles_of_X_per_unit_area_in_Y describes the amount of X in a column with unity base area of material/compartment Y. 'Sediment' means particulate matter bound at the sea floor. Information on the location of the interface between water column and sediment can be provided via the comment attribute. Cheers, Daniel On 15.05.2018 18:30, Lowry, Roy K. wrote: Dear Daniel, I think benthos chemistry is virgin territory for CF - not really surprising for a standard that started in the atmosphere before dipping its toes in the ocean. Some thoughts based on my experience with observed sediment chemistry data. The data may be reported per unit mass of wet or dry sediment or per unit volume of wet sediment. Also it is worth making clear that 'sediment' means sediment of all grain sizes (say a phrase like 'total_sediment') as samples are frequently sieved prior to analysis. I'm presuming your coming from a modelling perspective, so I'm not totally clear about your needs, but would something like 'mole_concentration_of_nitrogen_in_wet_total_sediment' be what you would be looking for? Cheers, Roy. I am retiring on 31/05/2018 but will continue to be active through an Emeritus Fellowship using this e-mail address. ________________________________ From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu><mailto:cf-metadata-boun...@cgd.ucar.edu> on behalf of Daniel Neumann <daniel.neum...@io-warnemuende.de><mailto:daniel.neum...@io-warnemuende.de> Sent: 15 May 2018 16:51 To: CF Metadata Mail List Subject: [CF-metadata] No standard names for element concentrations in sediment? Dear CF Mailing List, I am looking for standard names to describe the mole concentration of nitrogen in the sediment. The CF standard name table does not contain any standard names regarding "mole_concentration" in "sediment". I was wondering whether another term than "sediment" was used for such names. I also tried "mud", "seabed", and "sea_bed". Or do no such standard names exist at all? Cheers, Daniel _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu<mailto:CF-metadata@cgd.ucar.edu> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata CF-metadata Info Page - mailman.cgd.ucar.edu<http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata> mailman.cgd.ucar.edu This is an unmoderated list for discussions about interpretation, clarification, and proposals for extensions or change to the CF conventions. ________________________________ This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. 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