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 that salinity has been determined from the practical salinity
scale, 1978.
In the UNESCO report (UNESCO (1985) The international system of units
(SI) in oceanography, UNESCO Technical Papers No. 45, IAPSO Pub. Sci.
No. 32, Paris, France.) you can see (pages 43 / 44) that the 10-3
units was from an older definition of salinity and definitely should
NOT be used when using pss78.
Having said that, I understand that there is a lot of work going on at
the moment to redefine salinity, and that this is likely to 'relink'
conductivity measurements and salt concentrations, so we are likely to
get a salinity units again soon (but this is an oceanographic soon -
faster than an geological one, but not by much)
Helen
On 17 Jun 2009, at 09:19, Lowry, Roy K wrote:
Dear All,
Might be worth looking at
http://www.oceanographers.net/forums/showthread.php?t=902
Cheers, Roy.
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