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] on behalf of Nan Galbraith
[ngalbra...@whoi.edu]
Sent: 15 June 2015 17:49
To: Signell, Richard
Cc: 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> 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> 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; 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; Lewis, 1980
doi:10.1109/JOE.1980.1145448.
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