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SW_SpcHeat    Specific heat at constant pressure of seawater

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USAGE:  cp = SW_SpcHeat(T,S)
DESCRIPTION:
   Specific heat of seawater at 0.1 MPa given by [1]

INPUT:  (all must have same dimensions)
   T = temperature [degree C] (ITS-90)
   S = salinity    [g/kg] (reference-composition salinity)

OUTPUT:
   cp = specific heat   [J/kg K]

VALIDITY: 0 < T < 180 C; 0 < S < 180 g/kg;
 
ACCURACY: 0.28
 
REFERENCES:
  [1] D. T. Jamieson, J. S. Tudhope, R. Morris, and G. Cartwright, 
      Physical properties of sea water solutions: heat capacity,
      Desalination, 7(1), 23-30, 1969.
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