sw_tfreeze {marelac} | R Documentation |
Freezing Temperature of Seawater
Description
Estimates the freezing temperature of seawater, using the UNESCO 1983 polynomial.
Valid for salinity 4-40
Usage
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, ^\circ
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
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
[Package marelac version 2.1.11 Index]