gsw_t_from_rho_exact

in-situ temperature from density

Contents

USAGE:

[t, t_multiple] = gsw_t_from_rho_exact(rho,SA,p)

DESCRIPTION:

Calculates the in-situ temperature of a seawater sample, for given
values of its density, Absolute Salinity and sea pressure (in dbar).
TEOS-10 
Click for a more detailed description of calculating
in-situ temperature from density.

INPUT:

rho  =  density of a seawater sample (e.g. 1026 kg/m^3)       [ kg/m^3 ]
   Note. This input has not had 1000 kg/m^3 subtracted from it.
     That is, it is 'density', not 'density anomaly'.
SA  =  Absolute Salinity                                        [ g/kg ]
p   =  sea pressure                                             [ dbar ]
       ( i.e. absolute pressure - 10.1325 dbar )
rho & SA need to have the same dimensions.
p may have dimensions 1x1 or Mx1 or 1xN or MxN, where rho & SA are MxN.

OUTPUT:

t   =  in-situ temperature (ITS-90)                            [ deg C ]
t_multiple  =  in-situ temperature (ITS-90)                    [ deg C ]
  Note that at low salinities, in brackish water, there are two possible
    temperatures for a single density.  This programme will output both 
    valid solutions.  To see this second solution the user must call the 
    programme with two outputs (i.e. [t, t_multiple]), if there is only 
    one possible solution and the programme has been called with two 
    outputs the second variable will be set to NaN.

EXAMPLE:

rho = [1021.8484; 1022.2647; 1024.4207; 1027.7841; 1029.8287; 1031.9916;]
SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
p =  [     10;      50;     125;     250;     600;    1000;]
[t, t_multiple] = gsw_t_from_rho_exact(rho,SA,p)
t =
  28.760866806849798
  28.426820412666761
  22.834628310010174
  10.294318375673690
   6.946306842217355
   4.484889255629902
t_multiple =
   NaN
   NaN
   NaN
   NaN
   NaN
   NaN

AUTHOR:

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

VERSION NUMBER:

3.01 (26th May, 2011)

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 sections 3.1 and 3.3 of this TEOS-10 Manual.
The software is available from http://www.TEOS-10.org