Hi Nan, I must admit a little discomfort watching the process of CF semantic modelling replacing a well-known term with something that nobody in the domain would recognise without significant education. I didn't comment because I as a semantic modeller I can see both sides. However, I think you're right and Wally Broecker's work is so well absorbed into biogeochemistry that we should respect his terminology.
Cheers, Roy. ________________________________________ From: Nan Galbraith [[email protected]] Sent: 20 January 2015 18:35 To: [email protected] Subject: [CF-metadata] Fwd: Re: Request for new standard-name: apparent_oxygen_utilization Hi all - I received this follow-up from Ajay, and thought it would be OK to share it with the list. I wasn't aware of it, but 'apparent oxygen utilization' seems to be a well-defined term in oceanography. Not sure if this changes others' opinions, but it does change mine. Regards - Nan -------- Original Message -------- Subject: Re: [CF-metadata] Request for new standard-name: apparent_oxygen_utilization Date: Thu, 15 Jan 2015 15:24:25 -0500 From: Ajay Krishnan - NOAA Affiliate <[email protected]> To: Nan Galbraith <[email protected]> Hi Nan, I posed your question to the Science team that requested the standard name and this was their response: Maybe it is better to stick to a citable reference. No additional description of what AOU is necessary, in my opinion. But if one is needed, I can slightly modify Tim's version AOU, Apparent Oxygen Utilization, is defined as the difference between the saturation oxygen concentration at 1 atmosphere and the observed oxygen concentration (Broecker and Peng, 1982) Broecker, W. S. and T. H. Peng (1982), Tracers in the Sea, Lamont-Doherty Earth Observatory, Palisades, N. Y. ---------- Forwarded message ---------- Date: Thu, 15 Jan 2015 13:21:57 -0500 (EST) From: Tim Boyer <[email protected] <mailto:[email protected]>> To: Ajay Krishnan - NOAA Affiliate <[email protected] <mailto:[email protected]>> Subject: Re: Fwd: [CF-metadata] Request for new standard-name: apparent_oxygen_utilization Ajay, ... AOU is a standard calculation made by oceanographers to estimate non-physical usage of oxygen - non-physical meaning biological uptake/release and chemical reaction. Physically, it is assumed that oxygen will be saturated at the surface with respects to the atmosphere through physical processes and therefore only non-physical processes can alter oxygen content from saturation state. If Nan (or Hernan) would like to suggest a change or addition to the definition, thats fine. As for whether AOU should be defined somewhere else, cell method or standard name modifier - that is something for you CF experts to decide. Please ask Nan to propose such a definition. Thanks, Tim On Thu, Jan 15, 2015 at 9:30 AM, Nan Galbraith <[email protected] <mailto:[email protected]>> wrote: Hi, Ajay - This looks, at first glance, like a too-specific term; the definition doesn't carry as much information as the proposed standard name itself. What I mean, specifically is, aren't there times when the difference between saturation oxygen and observed oxygen are NOT a measure of oxygen utilization? And, isn't there an existing method to describe a value that represents a difference such as this? Standard name modifier, or cell method, I'm not sure which ... sorry I can't look more closely at this right now! Regards - Nan On 1/14/15 11:54 AM, Ajay Krishnan - NOAA Affiliate wrote: > Hi All, > > I had requested for a new standard name for > apparent_oxygen_utilization during the last week of November. > Since, there have been no discussions on it, I wanted to quickly > follow up on it. > > Thanks, > Ajay > > On Mon, Nov 24, 2014 at 2:16 PM, Ajay Krishnan - NOAA Affiliate > <[email protected] <mailto:[email protected]>> wrote: > > Dear CF community, > > On behalf of NODC, I would like to request for a new standard > name: > > apparent_oxygen_utiliziation (AOU) > definition: the difference between saturation oxygen content > and observed oxygen content. > units: micromoles/kg > > > Description is from Broecker and Peng, 1982, Tracers in > the Sea > > http://www.ldeo.columbia.edu/~broecker/Home_files/TracersInTheSea_searchable.pdf > > <http://www.ldeo.columbia.edu/%7Ebroecker/Home_files/TracersInTheSea_searchable.pdf> > (pp 131-138) > > Some more detail in Garcia et al., World Ocean Atlas > Volume 3: Dissolved Oxygen, Apparent Oxygen Utilization, and > Oxygen Saturation. > http://data.nodc.noaa.gov/woa/WOA13/DOC/woa13_vol3.pdf > > Thanks, > Ajay > > > -- ******************************************************* * Nan Galbraith Information Systems Specialist * * Upper Ocean Processes Group Mail Stop 29 * * Woods Hole Oceanographic Institution * * Woods Hole, MA 02543(508) 289-2444 <tel:%28508%29%20289-2444> * ******************************************************* _______________________________________________ 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. _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
