gsw_SA_freezing_from_t_poly

Absolute Salinity of seawater at the freezing point (poly)

Contents

USAGE:

SA_freezing = gsw_SA_freezing_from_t_poly(t,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 in-situ temperature t 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:

t  =  in-situ 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 t is MxN.

OUTPUT:

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

EXAMPLE:

t = [-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_t_poly(t,p,saturation_fraction)
SA_freezing =
  2.017072489768256
   2.151989342038462
  11.677649626115608
  32.843128114999026
  34.136459306273451
  33.097427522625182

AUTHOR:

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

VERSION NUMBER:

3.05 (28th 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