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Estimates the freezing temperature of seawater, using the UNESCO 1983 polynomial.
Valid for salinity 4-40
sw_tfreeze(S=35, p = P-1.013253, P = 1.013253 )
Temperature, \(^\circ\)C
practical salinity, -,
gauge or applied pressure, pressure referenced against the local atmospheric pressure, bar
true pressure, bar
Karline Soetaert <karline.soetaert@nioz.nl>
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
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
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
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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