gsw_CT_maxdensity_exact

Conservative Temperature of maximum density of seawater

Contents

USAGE:

CT_maxdensity_exact = gsw_CT_maxdensity_exact(SA,p)

DESCRIPTION:

Calculates the Conservative Temperature of maximum density of seawater.
This function returns the Conservative Temperature at which the density
of seawater is a maximum, at given Absolute Salinity, SA, and sea 
pressure, p (in dbar). 
Note that this function uses the full Gibbs function.  There is an 
alternative to calling this function, namely gsw_enthalpy(SA,CT,p), which
uses the computationally efficient 48-term expression for density in
terms of SA, CT and p (McDougall et al., 2011).   
Note that the 48-term equation has been fitted in a restricted range of 
parameter space, and is most accurate inside the "oceanographic funnel" 
described in McDougall et al. (2011).  The GSW library function 
"gsw_infunnel(SA,CT,p)" is avaialble to be used if one wants to test if 
some of one's data lies outside this "funnel".
TEOS-10 
Click for a more detailed description of calculating the
Conservative Temperature of maximum density.

INPUT:

SA =  Absolute Salinity                                         [ g/kg ]
p  =  sea pressure                                              [ dbar ]
      ( i.e. absolute pressure - 10.1325 dbar )
p may have dimensions 1x1 or Mx1 or 1xN or MxN, where SA is MxN.

OUTPUT:

CT_maxdensity_exact  =  Conservative Temperature at which the density
                        of seawater is a maximum for given Absolute
                        Salinity and pressure.                 [ deg C ]

EXAMPLE:

SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
p =  [     10;      50;     125;     250;     600;    1000;]
CT_maxdensity_exact = gsw_CT_maxdensity_exact(SA,p)
CT_maxdensity_exact =
  -3.720779524452287
  -3.849111898670119
  -4.046292804691113
  -4.290063909787930
  -5.065854290972595
  -5.995131932081709

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 section 3.42 of this TEOS-10 Manual.
McDougall T.J., P.M. Barker, R. Feistel and D.R. Jackett, 2011:  A 
 computationally efficient 48-term expression for the density of 
 seawater in terms of Conservative Temperature, and related properties
 of seawater.  To be submitted to Ocean Science Discussions. 
The software is available from http://www.TEOS-10.org