Salinity Calcluations

[Robert Helling]

Rob,

> On 10. Apr 2019, at 15:16, Rob Mason <robmason38 at googlemail.com> wrote:
> 
> I'm working my way through the Buhlmann model with a view to extending the planning functionality of SubSurface (purely self-interest in deco theory). I'm trying to understand the salinity variance, which I think comes from Schreiner extensions to the Buhlmann model? In core/dive.c water pressure calculations, what does the value 0.981 represent?
> 
> Dirk - you answered (thanks) - "that's gravity. We need the weight, not the mass.".  To confirm, this is using kN???  i.e. the standard specific weight of water? I wanted to be absolutely sure.

yes, we are looking for a pressure which is force per area, so we need the gravitational force exerted by the water column which is 9.81 m/^2 times its mass. The salinity is actually the mass of one liter of water.

Hope that helps.

Robert
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