gsw_SA_freezing_from_CT_poly

Absolute Salinity of seawater at the freezing point (poly)

Contents

USAGE:

SA_freezing = gsw_SA_freezing_from_CT_poly(CT,p,saturation_fraction)

DESCRIPTION:

Calculates the Absolute Salinity of seawater at the freezing temperature.  
That is, the output is the Absolute Salinity of seawater, with the 
fraction saturation_fraction of dissolved air, that is in equilibrium 
with ice at Conservative Temperature CT and pressure p.  If the input 
values are such that there is no positive value of Absolute Salinity for
which seawater is frozen, the output, SA_freezing, is put equal to NaN.
TEOS-10 
Click for a more detailed description of calculating
Absolute Salinity of seawater at the freezing point.

INPUT:

CT  =  Conservative Temperature (ITS-90)                       [ deg C ]
p   =  sea pressure                                             [ dbar ]
       ( i.e. absolute pressure - 10.1325 dbar )

OPTIONAL:
saturation_fraction = the saturation fraction of dissolved air in 
                      seawater.
 ( i.e., saturation_fraction must be between 0 and 1, and the default 
   is 0, air free )
p & saturation_fraction (if provided) may have dimensions 1x1 or Mx1 or 
1xN or MxN, where CT is MxN.

OUTPUT:

SA_freezing  =  Absolute Salinity of seawater when it freezes, for 
               given input values of Conservative Temperature
               pressure and air saturation fraction.            [ g/kg ]

EXAMPLE:

CT = [-0.11901; -0.15608;  -0.72138; -1.97738;  -2.31728;  -2.56764;]
p =  [     10;      50;     125;     250;     600;    1000;]
saturation_fraction = 1
SA_freezing = gsw_SA_freezing_from_CT_poly(CT,p,saturation_fraction)
SA_freezing =
   2.281810267792954
   2.418134292641376
  11.971996354752958
  32.867931280363138
  34.015087798162732
  32.856434894818825

AUTHOR:

Trevor McDougall and Paul Barker   [ help@teos-10.org ]

VERSION NUMBER:

3.05 (27th May, 2015)

REFERENCES:

IOC, SCOR and IAPSO, 2010: The international thermodynamic equation of
 seawater - 2010: Calculation and use of thermodynamic properties.
 Intergovernmental Oceanographic Commission, Manuals and Guides No. 56,
 UNESCO (English), 196 pp.  Available from the TEOS-10 web site.
  See section 3.3 of this TEOS-10 Manual.
McDougall, T.J., P.M. Barker, R. Feistel and B.K. Galton-Fenzi, 2014: 
 Melting of Ice and Sea Ice into Seawater and Frazil Ice Formation. 
 Journal of Physical Oceanography, 44, 1751-1775.
The software is available from http://www.TEOS-10.org