# gsw_pt_from_t_ice

**potential temperature of ice**

## Contents

## 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