Hello Matthias,
The Standard Name: concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_equivalent_mass_fraction_of_quinine_sulfate_dihydrate was set up to describe the measurements made by an ECO. Providing you have done nothing to recalibrate the data from the CTD then it will accurately describe your data. It refers to a protocol used to calibrate the sensor using standard solutions of quinine sulfate dihydride that has a very similar fluorescence response to CDOM. The resulting coefficients are applied to the raw sensor output by the instrument software. The Standard Name has been adopted by several communities in Europe. 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 enquir...@bodc.ac.uk. Please also use this e-mail if your requirement is urgent. ________________________________ From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Matthias Lankhorst <mlankho...@ucsd.edu> Sent: 20 December 2016 00:03 To: cf-metadata@cgd.ucar.edu Subject: [CF-metadata] standard name for CDOM Hi, I am looking to publish CDOM (colored dissolved organic matter) data from CTD casts, and cannot find a suitable standard name. The measurement is similar to that of chlorophyll fluorescence, but the wavelengths are tuned to detect this other material rather than chlorophyll. The sensor in question is a WETLabs ECO fluorometer. Existing names are as follows: concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_equivalent_mass_fraction_of_quinine_sulfate_dihydrate mass_concentration_of_chlorophyll_in_sea_water I understand that the property CDOM is vaguely defined. It is not one specific substance, but rather a mix of many. Should I somehow find a way to express my data in that first standard name? I have no idea what that quinine stuff is though, or how I could convert my bulk measurements to that equivalent. Or else, should we create one of the following new names (either one will work for me): mass_concentration_of_colored_dissolved_organic_matter_in_sea_water (canonical units would be kg / m3) mass_fraction_of_colored_dissolved_organic_matter_in_sea_water (canonical units would be 1) Regards, 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: mlankho...@ucsd.edu http://pordlabs.ucsd.edu/mlankhorst/ Matthias Lankhorst -- Home Page<http://pordlabs.ucsd.edu/mlankhorst/> pordlabs.ucsd.edu Matthias Lankhorst's Home Page _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata CF-metadata Info Page - mailman.cgd.ucar.edu Mailing Lists<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. ________________________________
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