Dear Rich, Thank you - I'll add this into the text.
Best wishes, Alison ------ Alison Pamment Tel: +44 1235 778065 Centre for Environmental Data Analysis Email: alison.pamm...@stfc.ac.uk<mailto:j.a.pamm...@rl.ac.uk> STFC Rutherford Appleton Laboratory R25, 2.22 Harwell Oxford, Didcot, OX11 0QX, U.K. From: Rich Pawlowicz [mailto:rpawlow...@eos.ubc.ca] Sent: 17 June 2015 16:39 To: Pamment, Alison (STFC,RAL,RALSP) Cc: jbgrayb...@mindspring.com; ngalbra...@whoi.edu; cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Practical Salinity units I see you have symbols for all salinities except reference salinity, but for consistency I will point out that it has a symbol of S_R. Rich. On Jun 16, 2015, at 6:47 AM, alison.pamm...@stfc.ac.uk<mailto:alison.pamm...@stfc.ac.uk> wrote: Dear Nan, Rich, Rich, John, Roy, All, This is great! Thank you all for spending the time to get the definition right for this important quantity. I know that Nan is keen we reach a conclusion: it seems we are just about there, and I hope the care and attention this name has received will mean that we can now settle it for a long time to come. Looking back, I see that psu has been the topic of sporadic discussion since at least 2006 so it really is good news that we at last seem to have reached an authoritative and well documented agreement. So, to summarize the state of play, I think we have now agreed on: sea_water_practical_salinity (canonical units: 1) 'Practical Salinity is a determination of the salinity of sea water, based on its electrical conductance. The measured conductance, corrected for temperature and pressure, is compared to the conductance of a standard potassium chloride solution, producing a value on the Practical Salinity Scale of 1978 (PSS-78). This name should not be used to describe salinity observations made before 1978, or ones not based on conductance measurements. Conversion of Practical Salinity to other precisely defined salinity measures should use the appropriate formulas specified by TEOS-10. Other standard names for precisely defined salinity quantities are sea_water_absolute_salinity (S_A); sea_water_preformed_salinity (S_*), sea_water_reference_salinity; sea_water_cox_salinity (S_C), used for salinity observations between 1967 and 1977; and sea_water_knudsen_salinity (S_K), used for salinity observations between 1901 and 1966. Salinity quantities that do not match any of the precise definitions should be given the more general standard name of sea_water_salinity. Reference: www.teos-10.org<http://www.teos-10.org>; Lewis, 1980 doi:10.1109/JOE.1980.1145448.' OK? In the interests of drawing this discussion to a close, unless any objections are received in the next seven days, this name will be accepted for amendment in the standard name table. Best wishes, Alison ------ Alison Pamment Tel: +44 1235 778065 Centre for Environmental Data Analysis Email: alison.pamm...@stfc.ac.uk<mailto:alison.pamm...@stfc.ac.uk> STFC Rutherford Appleton Laboratory R25, 2.22 Harwell Oxford, Didcot, OX11 0QX, U.K. -----Original Message----- From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of John Graybeal Sent: 15 June 2015 19:02 To: Nan Galbraith Cc: CF Metadata List; Rich Pawlowicz Subject: Re: [CF-metadata] Practical Salinity units These are good. I like Nan's rephrasing with Roy's substitution, better than what I wrote. john On Jun 15, 2015, at 10:28, Nan Galbraith <ngalbra...@whoi.edu<mailto:ngalbra...@whoi.edu>> wrote: Hi Roy - Sure, determination is fine. Thanks - Nan On 6/15/15 1:07 PM, Lowry, Roy K. wrote: Hi Nan, 'Determination'? - 'Estimate' sounds lik a guess to me. Cheers, Roy. ________________________________________ From: CF-metadata [cf-metadata-boun...@cgd.ucar.edu<mailto:cf-metadata-boun...@cgd.ucar.edu>] on behalf of Nan Galbraith [ngalbra...@whoi.edu<mailto:ngalbra...@whoi.edu>] Sent: 15 June 2015 17:49 To: Signell, Richard Cc: cf-metadata@cgd.ucar.edu<mailto:cf-metadata@cgd.ucar.edu>; Rich Pawlowicz Subject: Re: [CF-metadata] Practical Salinity units Hi all - On 6/15/15 11:12 AM, Signell, Richard wrote: I like the simpler version that John made, and Rich Pawlowicz reported back to me that both versions are acceptable to him, so Nan, do you think we could resolve the issue you have with John's version? If so, perhaps we could put this one to bed! I'm mainly concerned with 'measure of salinity' since it's ... not that. To keep this quick, maybe we could simply change word 'measure' to 'estimate'? Or to make the first sentence more clear, and less a collection of necessary phrases, could we break it into 2 and change it to: Practical Salinity is an estimate of salinity of sea water, based on its electrical conductance. The measured conductance, corrected for temperature and pressure, is compared to the conductance of a standard potassium chloride solution, producing a value on the Practical Salinity Scale of 1978 (PSS-78). If that's too much, I'll go with John's version, or Alison's ... yes, it would be good to wrap this up. Thanks! Nan On Fri, Jun 12, 2015 at 3:11 PM, Nan Galbraith <ngalbra...@whoi.edu<mailto:ngalbra...@whoi.edu>> wrote: Hi Alison and all - Either of these definitions looks fine to me. I'd prefer Alison's, because John's version might be a little misleading - the phrase 'measure of salinity' has some implications that aren't cleared up fast enough in the text for me. I'm mainly interested in moving the units along, though, so whatever is needed for the definition to work for us is all good. Thanks very much - Nan On Mon, Jun 8, 2015 at 8:51 AM, <alison.pamm...@stfc.ac.uk<mailto:alison.pamm...@stfc.ac.uk>> wrote: 'Practical Salinity is defined on the Practical Salinity Scale of 1978 (PSS-78) and is calculated from the electrical conductivity of sea water (as well as temperature and pressure). Practical Salinity is not a direct measure of salt concentration, rather, it is a relative scale calibrated against a standard potassium chloride solution containing 32.4356 g kg- 1 of KCl whose conductivity is measured at 15 degrees Celsius. Conversion of Practical Salinity to other precisely defined salinity measures should be performed by application of the appropriate formulas specified by TEOS-10. This name should not be used to describe salinity observations made before 1978, or ones not based on conductivity measurements. There are also standard names for the precisely defined salinity quantities sea_water_knudsen_salinity (S_K), used for salinity observations between 1901 and 1966, sea_water_cox_salinity (S_C), used for salinity observations between 1967 and 1977, sea_water_absolute_salinity (S_A), sea_water_preformed_salinity (S_*), and sea_water_reference_salinity. Salinity quantities that do not match any of the precise definitions should be given the more general standard name of sea_water_salinity. Reference:www.teos-10.org<http://10.org>; Lewis, 1980 doi:10.1109/JOE.1980.1145448.' On 6/8/15 2:18 PM, John Graybeal wrote: Practical Salinity is a measure of salinity performed on a relative scale calibrated against a standard potassium chloride solution, as defined on the Practical Salinity Scale of 1978 (PSS-78). This name should not be used to describe salinity observations made before 1978, or ones not based on conductivity measurements. Conversion of Practical Salinity to other precisely defined salinity measures should use the appropriate formulas specified by TEOS-10. Other standard names for precisely defined salinity quantities are sea_water_absolute_salinity (S_A); sea_water_preformed_salinity (S_*), sea_water_reference_salinity; sea_water_cox_salinity (S_C), used for salinity observations between 1967 and 1977; and sea_water_knudsen_salinity (S_K), used for salinity observations between 1901 and 1966. Salinity quantities that do not match any of the precise definitions should be given the more general standard name of sea_water_salinity. Reference: www.teos-10.org<http://www.teos-10.org>; Lewis, 1980 doi:10.1109/JOE.1980.1145448. -- ******************************************************* * Nan Galbraith Information Systems Specialist * * Upper Ocean Processes Group Mail Stop 29 * * Woods Hole Oceanographic Institution * * Woods Hole, MA 02543 (508) 289-2444 * ******************************************************* -- ******************************************************* * Nan Galbraith Information Systems Specialist * * Upper Ocean Processes Group Mail Stop 29 * * Woods Hole Oceanographic Institution * * Woods Hole, MA 02543 (508) 289-2444 * ******************************************************* _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu<mailto:CF-metadata@cgd.ucar.edu> 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. ________________________________ -- ******************************************************* * Nan Galbraith Information Systems Specialist * * Upper Ocean Processes Group Mail Stop 29 * * Woods Hole Oceanographic Institution * * Woods Hole, MA 02543 (508) 289-2444 * ******************************************************* _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu<mailto:CF-metadata@cgd.ucar.edu> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata --------------------------------------- John Graybeal jbgrayb...@mindspring.com<mailto:jbgrayb...@mindspring.com> 650-450-1853 skype: graybealski linkedin: http://www.linkedin.com/in/johngraybeal/ _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu<mailto:CF-metadata@cgd.ucar.edu> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- Rich Pawlowicz, Associate Professor, Ocean Dynamics Laboratory Dept. of Earth, Ocean, and Atmospheric Sciences, University of British Columbia 6339 Stores Rd., Vancouver BC CANADA V6T 1Z4 web: http://www.eos.ubc.ca/~rich tel: 604-822-1356
_______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
