gsw_pt0_from_t_ice

```potential temperature of ice with a reference
sea pressure of zero dbar```

USAGE:

`pt0_ice = gsw_pt0_from_t_ice(t,p)`

DESCRIPTION:

```Calculates potential temperature of ice with reference pressure,
pr = 0 dbar.  The present routine is computationally faster than the
more general function "gsw_pt_from_t_ice(t,p,pr)" which can be used
for any reference pressure value.```

INPUT:

```t   =   in-situ temperature (ITS-90)                          [ deg C ]
p   =   sea pressure                                           [ dbar ]
(ie. absolute pressure - 10.1325 dbar)```
`p may have dimensions 1x1 or Mx1 or 1xN or MxN, where t is MxN.`

OUTPUT:

```pt0_ice  =  potential temperature of ice                      [ deg C ]
with reference sea pressure (pr) = 0 dbar.
Note. The reference sea pressure of the output, pt0_ice, is zero dbar.```

EXAMPLE:

```t = [-10.7856; -13.4329; -12.8103; -12.2600;  -10.8863;  -8.4036;]
p = [     10;      50;     125;     250;     600;    1000;]```
`pt0_ice = gsw_pt0_from_t_ice(t,p)`
`pt0_ice =`
```  -10.787787898205298
-13.443730926050607
-12.837427056999708
-12.314321615760905
-11.017040858094250
-8.622907355083088```

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`