Compute seawater thermal conductivity, in \(W m^{1\circ}C^{1}\)
swThermalConductivity(salinity, temperature = NULL, pressure = NULL)
salinity  salinity (PSU), or a 

temperature  insitu temperature (\(^\circ\)C), defined
on the ITS90 scale; see “Temperature units” in the documentation for

pressure  pressure (dbar) 
Conductivity of seawater in \(W m^{1\,\circ}C^{1}\). To calculate thermal diffusivity in \(m^2/s\), divide by the product of density and specific heat, as in the example.
Caldwell's (1974) detailed formulation is used. To be specific, his equation 6 to calculate K, and his two sentences above that equation are used to infer this to be K(0,T,S) in his notation of equation 7. Then, application of his equations 7 and 8 is straightforward. He states an accuracy for this method of 0.3 percent. (See the check against his Table 1 in the “Examples”.)
Caldwell, Douglas R., 1974. Thermal conductivity of seawater, Deepsea Research, 21, 131137.
Other functions that calculate seawater properties:
T68fromT90()
,
T90fromT48()
,
T90fromT68()
,
swAbsoluteSalinity()
,
swAlphaOverBeta()
,
swAlpha()
,
swBeta()
,
swCSTp()
,
swConservativeTemperature()
,
swDepth()
,
swDynamicHeight()
,
swLapseRate()
,
swN2()
,
swPressure()
,
swRho()
,
swRrho()
,
swSCTp()
,
swSTrho()
,
swSigma0()
,
swSigma1()
,
swSigma2()
,
swSigma3()
,
swSigma4()
,
swSigmaTheta()
,
swSigmaT()
,
swSigma()
,
swSoundAbsorption()
,
swSoundSpeed()
,
swSpecificHeat()
,
swSpice()
,
swTFreeze()
,
swTSrho()
,
swTheta()
,
swViscosity()
,
swZ()
library(oce) # Values in m^2/s, a unit that is often used instead of W/(m*degC). swThermalConductivity(35, 10, 100) / (swRho(35,10,100) * swSpecificHeat(35,10,100)) # ocean#> [1] 1.512538e07#> [1] 1.526025e07# Caldwell Table 1 gives 1478e6 cal/(cm*sec*degC) at 31.5 o/oo, 10degC, 1kbar joulePerCalorie < 4.18400 cmPerM < 100 swThermalConductivity(31.5,10,1000) / joulePerCalorie / cmPerM#> [1] 0.00147754