# gsw_pt_from_t_ice

    potential temperature of ice

## Contents

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

## USAGE:

    pt_ice = gsw_pt_from_t_ice(t,p,p_ref)

## DESCRIPTION:

    Calculates potential temperature of ice with the general reference pressure,
    p_ref, from in-situ temperature, t.

## INPUT:

    t   =   in-situ temperature (ITS-90)                           [ deg C ]
    p   =   sea pressure                                            [ dbar ]
            ( i.e. absolute pressure - 10.1325 dbar )

    OPTIONAL:
    p_ref = reference pressure                                      [ dbar ]
            ( i.e. absolute reference pressure - 10.1325 dbar )
    (If reference pressure is not given then it is assumed that reference
     pressure is zero).

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

    A faster gsw routine exists if pr is indeed zero dbar, this routine
    is "gsw_pt0_from_t_ice(t,p)".

## OUTPUT:

    pt_ice  =  potential temperature of ice with                   [ deg C ]
               reference pressure, p_ref. (ITS-90)

## EXAMPLE:

    t = [-10.7856; -13.4329; -12.8103; -12.2600;  -10.8863;  -8.4036;]
    p =  [     10;      50;     125;     250;     600;    1000;]
    p_ref = 0

    pt_ice = gsw_pt_from_t_ice(t,p,p_ref)

    pt_ice =

      -10.787787898205272
      -13.443730926050661
      -12.837427056999676
      -12.314321615760921
      -11.017040858094234
       -8.622907355083147

## AUTHOR:

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

## VERSION NUMBER:

    3.05 (16th February, 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.

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