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 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> on behalf of Matthias Lankhorst <mlankhorst at ucsd.edu>
Sent: 20 December 2016 00:03
To: cf-metadata at 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: mlankhorst at ucsd.edu
http://pordlabs.ucsd.edu/mlankhorst/
Matthias Lankhorst -- Home Page<http://pordlabs.ucsd.edu/mlankhorst/>
pordlabs.ucsd.edu
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