# gsw_t_freezing

    in-situ temperature freezing point

## Contents

- USAGE:
- DESCRIPTION:
- INPUT:
- OUTPUT:
- EXAMPLE:
- AUTHOR:
- VERSION NUMBER:
- REFERENCES:

## USAGE:

    t_freezing = gsw_t_freezing(SA,p,saturation_fraction)

## DESCRIPTION:

    Calculates in-situ temperature freezing point of sea water.

    Click for a more detailed description of calculating
    in-situ temperature freezing.

## INPUT:

    SA  =  Absolute Salinity                                        [ g/kg ]
    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 1, completely saturated)

    p & saturation_fraction (if provided) may have dimensions 1x1 or Mx1
    or 1xN or MxN, where SA is MxN.

## OUTPUT:

    t_freezing = in-situ temperature at which seawater freezes.    [ deg C ]
                 (ITS-90)

## EXAMPLE:

    SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
    p =  [     10;      50;     125;     250;     600;    1000;]
    saturation_fraction = 1;

    t_freezing = gsw_t_freezing(SA,p,saturation_fraction)

    t_freezing =

      -1.902704434299200
      -1.942897945475226
      -2.006877364578649
      -2.091041391538033
      -2.351431560178946
      -2.660685237633709

## AUTHOR:

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

## VERSION NUMBER:

    3.02 (17th November, 2012)

## 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.

    The software is available from http://www.TEOS-10.org