Dear Jonathan,
Whilst that is one meaning of the word 'sediment', it is not the only one. The word is also used to describe the material collected by coring the seabed or filtering muddy waters which is then analysed for many chemical and biological substances. We have a lot of this kind of data and have learned the hard way how careful one has to be describing 'what was measured' for these measurements. Whilst none of these data have reached CF to date I feel sure they will come. Whilst your model of the seafloor may hold for large areas of ocean floor, it doesn't hold for ocean ridges, some shelf sea areas or shelf breaks where the bed is bare rock. Note that this isn't my main reason for preferring 'seabed'. My main concern is assigning a meaning to 'sediment' that we may well come to regret in the future. 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 <[email protected]> on behalf of Jonathan Gregory <[email protected]> Sent: 16 May 2018 18:10 To: [email protected] Subject: [CF-metadata] No standard names for element concentrations in sediment? Dear Daniel and Roy moles_of_nitrogen_per_unit_area_in_sediment makes sense to me. I am not an expert. From my reading of papers, I understand "sediment" to mean the solid but particulate matter that forms the sea floor at the bottom of the water. The sediment is up to thousands of metres thick and rests on the bedrock, which is the oceanic crust. Is this what you mean by sediment? Best wishes Jonathan ----- Forwarded message from "Lowry, Roy K." <[email protected]> ----- > Date: Wed, 16 May 2018 09:42:04 +0000 > From: "Lowry, Roy K." <[email protected]> > To: Daniel Neumann <[email protected]>, CF Metadata Mail List > <[email protected]> > Subject: Re: [CF-metadata] No standard names for element concentrations in > sediment? > > 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 <[email protected]> On Behalf Of Daniel > Neumann > Sent: 16 May 2018 09:28 > To: CF Metadata Mail List <[email protected]> > 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 > <[email protected]><mailto:[email protected]> > on behalf of Daniel Neumann > <[email protected]><mailto:[email protected]> > 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 > > -- > 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: > [email protected]<mailto:[email protected]> > > _______________________________________________ > CF-metadata mailing list > [email protected]<mailto:[email protected]> > 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. > 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. Any material supplied to NERC may be stored in an electronic > records management system. > ________________________________ > > > > -- > > 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: > [email protected]<mailto:[email protected]> > > ________________________________ > 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. Any material supplied to NERC may be stored in an electronic > records management system. > ________________________________ > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ----- End forwarded message ----- _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ________________________________ 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. Any material supplied to NERC may be stored in an electronic records management system. ________________________________
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