[CF-metadata] Standard Names Representing Measurements not due to some process

Lowry, Roy K. rkl at bodc.ac.uk
Tue Apr 4 03:20:13 MDT 2017


Hi Barna,


That's fine by me - my preference was based on precedents such as 'heat_flux_into_sea_water_due_to_sea_ice_thermodynamics', although these are more usually associated with modelling where the process involved is crystal clear.  Thinking about it I'd forgotten about colloids and no doubt something else!


Could you put together a definition, in which I'd include an explanation that it's the attenuance due to everything in the sample except pure water that attenuates radiation, and confirm that the canonical unit for the Standard Name is m-1 (per metre)?


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: Andrew Barna <abarna at ucsd.edu>
Sent: 03 April 2017 23:41
To: Lowry, Roy K.
Cc: cf-metadata at cgd.ucar.edu
Subject: Re: [CF-metadata] Standard Names Representing Measurements not due to some process

Roy,

The *_due_to_dissolved_and_particulate_material version does match with the given name guidelines but it seems to make assumptions about the processes involved.
I would prefer the "corrected_for_pure_water_attenuance" version unless the definition essentially defines "dissolved and particulate material" as being anything except pure water, I can try to write/modify the existing definition to match this intent. This is my first go at trying to contribute a standard name, as such, apologies for my uncertainty.

-Barna



On Mar 31, 2017, at 05:55, Lowry, Roy K. <rkl at bodc.ac.uk<mailto:rkl at bodc.ac.uk>> wrote:

Dear Andrew,

It's somewhat difficult to be elegant here, but here are some suggestions:

volume_beam_attenuation_coefficient_of_radiative_flux_in_sea_water_corrected_for_pure_water_attenuance
volume_beam_attenuation_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_and_particulate_material

The latter would be my personal preference. Some explanation would be needed in the definition.

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 Andrew Barna <abarna at ucsd.edu<mailto:abarna at ucsd.edu>>
Sent: 30 March 2017 20:02
To: cf-metadata at cgd.ucar.edu<mailto:cf-metadata at cgd.ucar.edu>
Subject: [CF-metadata] Standard Names Representing Measurements not due to some process

Hello,

I was having a discussion regarding rosette mounted transmissometers, specifically the Wetlabs C-Star.

The most obvious standard name for the measurement appears to be:
volume_beam_attenuation_coefficient_of_radiative_flux_in_sea_water

However, because of the way the instrument is calibrated, the attenuation due to the (pure) water itself is not a constituent of the reported attenuation coefficient.
The resulting modification would appear to be:
volume_beam_attenuation_coefficient_of_radiative_flux_in_sea_water_not_due_to_water (or some variant, _not_due_to_pure_water)

Is there a better way to account for reporting parameters which are the result of all processes except for some known process?

Thanks,
-Barna
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