Thanks to you both. Roy's reference to 'dissolved oxygen' explains why the term would have been added, and Philip's argument for preserving this more narrow concept makes good sense to me. While I'm imaginging measures of mole_concentration?oxygen_in_sea_water might include some oxygen that is not 'dissolved', I think we can afford to wait for a future use case to make that change/addition.
John
On May 18, 2013, at 09:18, "Cameron-smith, Philip" <cameronsmith1 at llnl.gov> wrote:
>
> Hi Roy, John,
>
> The methane bubbles are in both models and observations. Specifically, the methane bubbles are measured using sonar reflectivity, and my colleagues are trying to match those observations in a model.
>
> How much of the bubbles dissolve is of particular importance, and by their nature it means that the total methane concentration (gas + dissolved) exceeds methane solubility on some scale.
>
> Hence, it makes sense to me to keep 'dissolved' in the CF table for consistency, precision, and future expansion into bubbles.
>
> Best wishes :-),
>
> Philip
>
> Sent by Philip Cameron-Smith from his blackberry.
>
> ----- Original Message -----
> From: Lowry, Roy K. [mailto:rkl at bodc.ac.uk]
> Sent: Saturday, May 18, 2013 02:52 AM
> To: Cameron-smith, Philip; 'graybeal at marinemetadata.org' <graybeal at marinemetadata.org>; 'cf-metadata at cgd.ucar.edu' <cf-metadata at cgd.ucar.edu>
> Subject: RE: [CF-metadata] is molecular oxygen in seawater always dissolved?
>
> Hello Philip,
>
> Was that measured (John's area of concern) or a parameter in a numerical simulation?
>
> Cheers, Roy.
>
> ________________________________________
> From: CF-metadata [cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Cameron-smith, Philip [cameronsmith1 at llnl.gov]
> Sent: 18 May 2013 10:12
> To: 'graybeal at marinemetadata.org'; 'cf-metadata at cgd.ucar.edu'
> Subject: Re: [CF-metadata] is molecular oxygen in seawater always dissolved?
>
> Hi John,
>
> I don't recall the original discussion. However, I do work on a problem involving both dissolved methane and methane that is in bubbles, and the distinction is critical, ie we need to know whether a plume of bubbles will make it to the ocean surface.
>
> Best wishes,
>
> Philip
>
> Sent by Philip Cameron-Smith from his blackberry.
>
> ----- Original Message -----
> From: John Graybeal [mailto:graybeal at marinemetadata.org]
> Sent: Friday, May 17, 2013 11:47 AM
> To: CF Metadata List <cf-metadata at cgd.ucar.edu>
> Subject: [CF-metadata] is molecular oxygen in seawater always dissolved?
>
> Hi all,
>
> I found an odd thing in one of the standard names, and I'm not sure if it's exactly right or I need another name.
>
> For context: We (Marinexplore, new affiliation) are aggregating data from A Lot of different sources. So this question is not about one specific observation, but how to best represent all the observations we'll be working with.
>
> The name is mole_concentration_of_dissolved_molecular_oxygen_in_sea_water. There is no equivalent name without "dissolved", and I am wondering if a mole concentration of molecular oxygen in sea water will always be dissolved? Or should I request a name without that in it? (In the original CF email from 2010 requesting this name "dissolved" did not appear, and it isn't clear from the history what motivated its inclusion.)
>
> Thanks for your advice, and thanks to Alison for your research help.
>
> John
>
>
> ---------------------------------------------------
> John Graybeal
> Senior Data Manager, Metadata and Semantics
>
> T +1 (408) 675-5545
> F +1 (408) 616-1626
> skype: graybealski
>
> Marinexplore
> 920 Stewart Drive
> Sunnyvale, CA
>
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>
---------------
John Graybeal
Marine Metadata Interoperability Project:
http://marinemetadata.org
graybeal at marinemetadata.org
Received on Sat May 18 2013 - 10:25:22 BST
