# gsw_CT_freezing

    Conservative Temperature freezing point

## Contents

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

## USAGE:

    CT_freezing = gsw_CT_freezing(SA,p,saturation_fraction)

## DESCRIPTION:

    Calculates Conservative Temperature freezing point of sea water.

    Click for a more detailed description of calculating
    Conservative 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:

    CT_freezing = Conservative Temperature at freezing of seawater [ deg C ]
                  That is, the freezing temperature expressed in
                  terms of Conservative Temperature (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;

    CT_freezing = gsw_CT_freezing(SA,p,saturation_fraction)

    CT_freezing =

      -1.899657519404743
      -1.940781208575193
      -2.006256923078589
      -2.092413889940425
      -2.359438414203326
      -2.677347349358548

## 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