gsw_dynamic_enthalpy

dynamic enthalpy of seawater
(48-term equation)

Contents

USAGE:

dynamic_enthalpy  =  gsw_dynamic_enthalpy(SA,CT,p)

DESCRIPTION:

Calculates dynamic enthalpy of seawater using the computationally-
efficient 48-term expression for density in terms of SA, CT and p
(McDougall et al., 2011).  Dynamic enthalpy is defined as enthalpy minus
potential enthalpy (Young, 2010). 
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 dynamic enthalpy.

INPUT:

SA  =  Absolute Salinity                                        [ g/kg ]
CT  =  Conservative Temperature                                [ deg C ]
p   =  sea pressure                                             [ dbar ]
       ( i.e. absolute pressure - 10.1325 dbar )
SA & CT need to have the same dimensions.
p may have dimensions 1x1 or Mx1 or 1xN or MxN, where SA & CT are MxN.

OUTPUT:

dynamic_enthalpy  =  dynamic enthalpy                           [ J/kg ]

EXAMPLE:

SA = [34.7118; 34.8915; 35.0256; 34.8472; 34.7366; 34.7324;]
CT = [28.8099; 28.4392; 22.7862; 10.2262;  6.8272;  4.3236;]
p =  [     10;      50;     125;     250;     600;    1000;]
dynamic_enthalpy = gsw_dynamic_enthalpy(SA,CT,p)
dynamic_enthalpy =
1.0e+003 *
   0.097864649180491
   0.489161224318287
   1.220511487957649
   2.433730243703573
   5.833879407549211
   9.711445229571982

AUTHOR:

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

VERSION NUMBER:

3.01 (18th 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 appendix A.11 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. 
Young, W.R., 2010: Dynamic enthalpy, Conservative Temperature, and the
 seawater Boussinesq approximation. Journal of Physical Oceanography, 
 40, 394-400.
The software is available from http://www.TEOS-10.org