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May 12, 2014 15:07
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Density of sea-water using Wright et al. 1997, equation of state
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| def dens_wright_eos(T, S, p): | |
| """ | |
| Equation of state for sea water given by Wright, 1997, J. Atmos. Ocean. Tech., 14, 735-740. | |
| Units: T[degC],S[PSU],p[Pa] | |
| Returns density [kg m-3] | |
| """ | |
| a0 = 7.057924e-4; a1 = 3.480336e-7; a2 = -1.112733e-7 | |
| b0 = 5.790749e8; b1 = 3.516535e6; b2 = -4.002714e4; b3 = 2.084372e2; b4 = 5.944068e5; b5 = -9.643486e3 | |
| c0 = 1.704853e5; c1 = 7.904722e2; c2 = -7.984422; c3 = 5.140652e-2; c4 = -2.302158e2; c5 = -3.079464 | |
| al0 = a0 + a1*T +a2*S | |
| p0 = b0 + b4*S + T * (b1 + T*(b2 + b3*T) + b5*S) | |
| l = c0 +c4*S + T * (c1 + T*(c2 + c3*T) + c5*S) | |
| return (p + p0) / (l + al0*(p+p0)) |
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