Freezing Temperature of Seawater

Description

Estimates the freezing temperature of seawater, using the UNESCO 1983 polynomial.

Valid for salinity 4-40

Usage

1
sw_tfreeze(S=35, p = P-1.013253, P = 1.013253 )

Arguments

S

practical salinity, -,

p

gauge or applied pressure, pressure referenced against the local atmospheric pressure, bar

P

true pressure, bar

Value

Temperature, degrees C

Note

freezing temperature for S = 40, p = 50 is -2.588567 dgC.

Author(s)

Karline Soetaert <karline.soetaert@nioz.nl>

References

Fofonoff NP and Millard RC Jr, 1983. Algorithms for computation of fundamental properties of seawater. UNESCO technical papers in marine science, 44, 53 pp.
http://unesdoc.unesco.org/images/0005/000598/059832EB.pdf

See Also

sw_adtgrad, sw_alpha, sw_beta, sw_comp, sw_conserv, sw_cp, sw_dens, sw_depth, sw_enthalpy, sw_entropy, sw_gibbs, sw_kappa, sw_kappa_t, sw_sfac, sw_svel, sw_tpot

Examples

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sw_tfreeze(S = 40,p = 50)

## Check values
sw_tfreeze(S = 10,p = 0)  #-0.542
sw_tfreeze(S = 10,p = 10) #-0.618
sw_tfreeze(S = 30,p = 0)  #-1.638
sw_tfreeze(S = 40,p = 50) #-2.589

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