Dear John and Roy,
Thanks both for your quick replies. Well spotted regarding the underscores in the definition - I'll take them out.
I think we're agreed so this name is accepted for publication in the standard name table. It will be added in the next update on May 17th.
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065
Centre for Environmental Data Analysis Email: alison.pamment at stfc.ac.uk<mailto:J.A.Pamment at rl.ac.uk>
STFC Rutherford Appleton Laboratory
R25, 2.22
Harwell Campus, Didcot, OX11 0QX, U.K.
From: Lowry, Roy K. [mailto:rkl at bodc.ac.uk]
Sent: 20 April 2016 07:44
To: John Maurer
Cc: Pamment, Alison (STFC,RAL,RALSP); cf-metadata at cgd.ucar.edu; j.m.gregory at reading.ac.uk
Subject: Re: [CF-metadata] request for new CF standard_name: CDOM
Thanks John,
Totally agree about those underscores - I'd overlooked them.
Cheers, Roy.
Please note that I partially retired on 01/11/2015. I am now only working 7.5 hours a week and can only guarantee e-mail response on Wednesdays, my day in the office. All vocabulary queries should be sent to enquiries at bodc.ac.uk<mailto:enquiries at bodc.ac.uk>. Please also use this e-mail if your requirement is urgent.
________________________________
From: John Maurer <jmaurer at hawaii.edu<mailto:jmaurer at hawaii.edu>>
Sent: 19 April 2016 19:14
To: Lowry, Roy K.
Cc: alison.pamment at stfc.ac.uk<mailto:alison.pamment at stfc.ac.uk>; cf-metadata at cgd.ucar.edu<mailto:cf-metadata at cgd.ucar.edu>; j.m.gregory at reading.ac.uk<mailto:j.m.gregory at reading.ac.uk>
Subject: Re: [CF-metadata] request for new CF standard_name: CDOM
Thanks for the follow-up, Alison. I agree with Roy, and I I think it looks good. I might question the underlines in "chromophoric_dissolved_organic_matter", though, unless that is going to be an acceptable alias standard_name in the CF table.
Cheers,
John
On Tue, Apr 19, 2016 at 1:14 AM, Lowry, Roy K. <rkl at bodc.ac.uk<mailto:rkl at bodc.ac.uk>> wrote:
Hi Alison,
I like that text and I think those sentences are important in the understanding of the property that has been measured and so would recommend leaving them in place.
Cheers, Roy.
Please note that I partially retired on 01/11/2015. I am now only working 7.5 hours a week and can only guarantee e-mail response on Wednesdays, my day in the office. All vocabulary queries should be sent to enquiries at bodc.ac.uk<mailto:enquiries at bodc.ac.uk>. Please also use this e-mail if your requirement is urgent.
________________________________________
From: CF-metadata <cf-metadata-bounces at cgd.ucar.edu<mailto:cf-metadata-bounces at cgd.ucar.edu>> on behalf of alison.pamment at stfc.ac.uk<mailto:alison.pamment at stfc.ac.uk> <alison.pamment at stfc.ac.uk<mailto:alison.pamment at stfc.ac.uk>>
Sent: 19 April 2016 12:04
To: jmaurer at hawaii.edu<mailto:jmaurer at hawaii.edu>; cf-metadata at cgd.ucar.edu<mailto:cf-metadata at cgd.ucar.edu>
Cc: j.m.gregory at reading.ac.uk<mailto:j.m.gregory at reading.ac.uk>
Subject: Re: [CF-metadata] request for new CF standard_name: CDOM
Dear John, Jonathan and Roy,
Thanks for the discussion of this name, which I think has been mostly agreed:
concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_equivalent_mass_fraction_of_quinine_sulfate_dihydrate (canonical units: 1)
For the definition, I was planning to simply use the text from John's original proposal:
' The quantity concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_equivalent_mass_fraction_of_quinine_sulfate_dihydrate, is also commonly known as chromophoric_dissolved_organic_matter or CDOM. CDOM plays an important role in the carbon cycling and biogeochemistry of coastal waters. It occurs naturally in aquatic environments primarily as a result of tannins released from decaying plant and animal matter, which can enter coastal areas in river run-off containing organic materials leached from soils. When present in high concentrations, it imparts a brown or yellowish color to water. Its presence can negatively impact fish populations by reducing dissolved oxygen concentrations to harmful levels and by releasing nutrients and metals that contaminate the water. Increased understanding of the role of CDOM will further our ability to manage and protect coastal ecosystems. Sensors are commonly calibrated against a 100 parts per billion (ppb) quinine sulfate dihydrate solution, a fluoresce
nt reference standard commonly used with CDOM sensors. CDOM sensors therefore report in "QSDE" (quinine sulfate dihydrate equivalents). It is important to note, however, that CDOM concentrations in QSDE are not necessarily equivalent to the in situ CDOM concentrations in ppb.'
I'm wondering whether to leave in the last two sentences about units, since we decided that CF canonical units should be '1' (dimensionless). Do you think it's better to keep that text or will it just cause confusion for CF users?
If we can finalise the definition then this name can be accepted for publication in the standard name table.
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065<tel:%2B44%201235%20778065>
Centre for Environmental Data Analysis Email: alison.pamment at stfc.ac.uk<mailto:alison.pamment at stfc.ac.uk>
STFC Rutherford Appleton Laboratory
R25, 2.22
Harwell Campus, Didcot, OX11 0QX, U.K.
From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu<mailto:cf-metadata-bounces at cgd.ucar.edu>] On Behalf Of John Maurer
Sent: 30 March 2016 20:37
To: cf-metadata at cgd.ucar.edu<mailto:cf-metadata at cgd.ucar.edu>
Cc: Jonathan Gregory
Subject: Re: [CF-metadata] request for new CF standard_name: CDOM
Thanks, Jonathan and Roy! Your suggestions sound fine by me.
Cheers,
John Maurer
Pacific Islands Ocean Observing System (PacIOOS)
University of Hawaii at Manoa
Date: Fri, 25 Mar 2016 09:05:08 +0000
From: "Lowry, Roy K." <rkl at bodc.ac.uk<mailto:rkl at bodc.ac.uk>>
To: Jonathan Gregory <j.m.gregory at reading.ac.uk<mailto:j.m.gregory at reading.ac.uk>>,
"cf-metadata at cgd.ucar.edu<mailto:cf-metadata at cgd.ucar.edu>" <cf-metadata at cgd.ucar.edu<mailto:cf-metadata at cgd.ucar.edu>>
Subject: Re: [CF-metadata] request for new CF standard_name: CDOM
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Dear Jonathan,
Although long-winded your suggestion of:
concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_equivalent_mass_fraction_of_quinine_sulfate_dihydrate
has the great advantage of preventing any confusion between this measurement and a true CDOM concentration determined by some other method. Having mass_fraction in there is particularly valuable as when we encountered this measurement the stock solutions used to calibrate the sensors had the QSD concentrations expressed in nM rather than ppb.
I also agree dimensionless is the best choice for the Canonical Unit.
Cheers, Roy.
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