Equation of State (EOS-80)

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Presentation transcript:

Equation of State (EOS-80) Determines water density from T, S, and P A through N are polynomials T is temperature in oC S salinity P pressure in bars

Check values: A B C D T0 999.842594 8.24493E-1 -5.72466E-3 4.8314E-4 F G 19652.21 54.6746 7.944E-2 148.4206 -0.603459 1.6483E-2 -2.327105 1.09987E-2 -5.3009E-4 1.360477E-2 -6.1670E-5 -5.155288E-5 H I J 3.239908 2.2838E-3 1.91075E-4 1.43713E-3 -1.0981E-5 1.16092E-4 -1.6078E-6 -5.77905E-7 M N 8.50935E-5 -9.9348E-7 -6.12293E-6 2.0816E-8 5.2787E-8 9.1697E-10 Check values:

90 % of Ocean Water Greater influence of salinity on density Mean T & S for World Ocean Greater influence of salinity on density

Effects of Temperature and Salinity on Density Thermal Expansion Saline Contraction x 10-4 oC-1 x 10-4 S-1 Density changes by 0.2 kg/m3 for a T change of 1oC, and by 0.8 kg/m3 for a S change of 1.