Re: [CF-metadata] Salinity units

2015-07-08 Thread Durack, Paul J.
. From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Durack, Paul J. Sent: 30 June 2015 18:23 To: cf-metadata@cgd.ucar.edumailto:cf-metadata@cgd.ucar.edu Subject: [CF-metadata] Salinity units Apologies for coming to the party so late on this one folks.. I do believe

Re: [CF-metadata] Salinity units

2015-07-01 Thread alison.pamment
Oxford, Didcot, OX11 0QX, U.K. From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Durack, Paul J. Sent: 30 June 2015 18:23 To: cf-metadata@cgd.ucar.edu Subject: [CF-metadata] Salinity units Apologies for coming to the party so late on this one folks.. I do believe that before

[CF-metadata] Salinity units

2015-06-30 Thread Durack, Paul J.
Apologies for coming to the party so late on this one folks.. I do believe that before progressing on changing the units for any of these variables, there needs to be a consideration/revisitation of what is currently in place. Back in 2011 when the TEOS-10 standard names were proposed we spent

Re: [CF-metadata] Salinity units

2015-06-03 Thread Jonathan Gregory
Dear all The bulk of archived CF-netCDF salinity data is probably the vast amounts of CMIP ocean model data, so I don't think we can reinterpret what this means more precisely, since models differ in which equations of state they use. Thus sea_surface_salinity and sea_water_salinity are

Re: [CF-metadata] Salinity units

2015-06-02 Thread alison.pamment
Message- From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Nan Galbraith Sent: 02 June 2015 15:47 To: cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Salinity units Hi All - Can we move on this question? I think the real problems with the unit .001

Re: [CF-metadata] Salinity units

2015-06-02 Thread Lowry, Roy K.
and report back. Cheers, Roy. From: alison.pamm...@stfc.ac.uk [alison.pamm...@stfc.ac.uk] Sent: 02 June 2015 17:22 To: ngalbra...@whoi.edu; cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Salinity units Dear Nan, All, Reading through what you and Rich saying

Re: [CF-metadata] Salinity units

2015-05-27 Thread Signell, Richard
. From: Reyna Jenkyns [re...@uvic.ca] Sent: 22 May 2015 18:06 To: cf-metadata@cgd.ucar.edu; OceanSITES Data Management Team; Nan Galbraith Subject: Re: [CF-metadata] Salinity units I'm interested in this topic since I didn't realize what had been discussed previously, and now I think we must be non

Re: [CF-metadata] Salinity units

2015-05-27 Thread Jim Biard
Subject: Re: [CF-metadata] Salinity units I'm interested in this topic since I didn't realize what had been discussed previously, and now I think we must be non-compliant as well. Is this documented formally in the CF documentation? Reyna Jenkyns | Data Stewardship Team Lead - Digital Infrastructure

Re: [CF-metadata] Salinity units

2015-05-27 Thread John Graybeal
I went back to original concerns, as the discussion is a little bit here and there. From this I conclude the canonical unit for P.S. should be changed to 1. (For historians, I see there was a brief thread 2009.06.17 titled 'salinity units', which started down the same question but then got

Re: [CF-metadata] Salinity units

2015-05-27 Thread Nan Galbraith
R25, 2.22 Harwell Oxford, Didcot, OX11 0QX, U.K. From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Nan Galbraith Sent: 27 May 2015 15:45 To: Rich Pawlowicz Cc:cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Salinity units Hi all - The '.001' units for P.S

Re: [CF-metadata] Salinity units

2015-05-27 Thread Nan Galbraith
-metadata@cgd.ucar.edu; OceanSITES Data Management Team; Nan Galbraith Subject: Re: [CF-metadata] Salinity units I'm interested in this topic since I didn't realize what had been discussed previously, and now I think we must be non-compliant as well. Is this documented formally in the CF

Re: [CF-metadata] Salinity units

2015-05-27 Thread alison.pamment
-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Nan Galbraith Sent: 27 May 2015 15:45 To: Rich Pawlowicz Cc: cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Salinity units Hi all - The '.001' units for P.S. doesn't mean that stored values of practical salinity differs from A.S

Re: [CF-metadata] Salinity units

2015-05-26 Thread Signell, Richard
Management Team; Nan Galbraith Subject: Re: [CF-metadata] Salinity units I'm interested in this topic since I didn't realize what had been discussed previously, and now I think we must be non-compliant as well. Is this documented formally in the CF documentation? Reyna Jenkyns | Data

Re: [CF-metadata] Salinity units

2015-05-22 Thread Lowry, Roy K.
...@usgs.gov] Sent: 22 May 2015 20:01 To: Lowry, Roy K. Cc: Reyna Jenkyns; cf-metadata@cgd.ucar.edu; OceanSITES Data Management Team; Nan Galbraith; Richard Pawlowicz Subject: Re: [CF-metadata] Salinity units Roy, For sure dimensionless. But 1.0, 0.001 or g/kg? The latest version (27) of the CF

Re: [CF-metadata] Salinity units

2015-05-22 Thread Signell, Richard
respect. Cheers, Roy. From: Reyna Jenkyns [re...@uvic.ca] Sent: 22 May 2015 18:06 To: cf-metadata@cgd.ucar.edu; OceanSITES Data Management Team; Nan Galbraith Subject: Re: [CF-metadata] Salinity units I'm interested in this topic since I didn't realize

Re: [CF-metadata] Salinity units

2015-05-22 Thread Nan Galbraith
...@whoi.edu Sent: Friday, May 22, 2015 10:03 AM To: cf-metadata@cgd.ucar.edu; OceanSITES Data Management Team Subject: Re: [CF-metadata] Salinity units Hello all - It's been a long time, but is anyone interested in re-visiting the subject of units for practical salinity in CF? I was recently notified

Re: [CF-metadata] Salinity units

2015-05-22 Thread Durack, Paul J.
...@llnl.govmailto:dura...@llnl.gov Subject: Fwd: Re: [CF-metadata] Salinity units FYI Forwarded Message Subject:Re: [CF-metadata] Salinity units Date: Fri, 22 May 2015 13:03:24 -0400 From: Nan Galbraith ngalbra...@whoi.edumailto:ngalbra...@whoi.edu Reply-To: ngalbra

Re: [CF-metadata] Salinity units

2015-05-22 Thread Nan Galbraith
Hello all - It's been a long time, but is anyone interested in re-visiting the subject of units for practical salinity in CF? I was recently notified that my salinity data was likely to be overlooked by some users, because I'd used '1' as the units, not '.001'. Somehow, I'd forgotten the

Re: [CF-metadata] Salinity units

2015-05-22 Thread Lowry, Roy K.
Galbraith Subject: Re: [CF-metadata] Salinity units I'm interested in this topic since I didn't realize what had been discussed previously, and now I think we must be non-compliant as well. Is this documented formally in the CF documentation? Reyna Jenkyns | Data Stewardship Team Lead - Digital

Re: [CF-metadata] Salinity units

2015-05-22 Thread Reyna Jenkyns
-metadata@cgd.ucar.edu; OceanSITES Data Management Team Subject: Re: [CF-metadata] Salinity units Hello all - It's been a long time, but is anyone interested in re-visiting the subject of units for practical salinity in CF? I was recently notified that my salinity data was likely to be overlooked by some

Re: [CF-metadata] Salinity units

2009-06-19 Thread Russ Rew
Karl, We are using dB for one of the radar reflectivity fields that will be collected as part of CMIP5. So, I second Jonathan's suggestion to allow dB as a unit in udunits. No one has ever mentioned to me what the reference level for this field is, so I'm afraid it won't be part of

[CF-metadata] Salinity units

2009-06-17 Thread Lowry, Roy K
Dear All, During an exercise with Alison mapping the CF Standard Names to a units vocabulary in the BODC vocabulary server I noticed that the units for salinity were '1.00E-03', i.e. parts per thousand. My understanding in that since the introduction of the Practical Salinity Scale that

[CF-metadata] Salinity units

2009-06-17 Thread Jonathan Gregory
Dear Roy and Alison The intention of recording the units as 1e-3 (dimensionless) was to suggest a canonical unit of PSU i.e. approximately the same as parts per thousand. However, this is unclear and therefore unsatisfactory. We have discussed this before, in fact, and I believe we have decided

[CF-metadata] Salinity units

2009-06-17 Thread Jonathan Gregory
Dear Roy The reason I'm resurrecting this discussion is that we came under strong pressure from a group of physical oceanographers to use 'dimensionless' with no scaling factor instead of PSU for salinity. I was raising the issue on the list to see how widespread this opinion was. Yes, I

Re: [CF-metadata] salinity units

2009-06-17 Thread Helen Snaith
to throw in an oceanographers viewpoint... measured salinity has no units - it is determined from conductivity and has no relationship to ppt, ppm psu or any other unit. 10-3 seems very dangerous (and equally wrong) the only 'units' used recently (officially) are to state 'pss78' to define

Re: [CF-metadata] Salinity units

2009-06-17 Thread Russ Rew
Jonathan, The intention of recording the units as 1e-3 (dimensionless) was to suggest a canonical unit of PSU i.e. approximately the same as parts per thousand. However, this is unclear and therefore unsatisfactory. We have discussed this before, in fact, and I believe we have decided in

[CF-metadata] Salinity units

2009-06-17 Thread Jonathan Gregory
Dear Russ I think it's a good development for udunits to support logarithmic units. In CF standard names, however, we have taken the approach of stating the reference level as part of the definition of the quantity, possibly allowing it to be specified alternatively in a scalar coordinate

Re: [CF-metadata] Salinity units

2009-06-17 Thread Jon Blower
to see how widespread this opinion was. Cheers, Roy. -Original Message- From: cf-metadata-boun...@cgd.ucar.edu [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Jonathan Gregory Sent: 17 June 2009 08:06 To: cf-metadata@cgd.ucar.edu Subject: [CF-metadata] Salinity units Dear