Compute specific heat of seawater.
swSpecificHeat(salinity, temperature = NULL, pressure = 0,
longitude = NULL, latitude = NULL, eos = getOption("oceEOS",
default = "gsw"))either practical salinity (in which case temperature
and pressure must be provided) or an oce object (in
which case salinity, etc. are inferred from the object).
in-situ temperature [\(^\circ\)C], defined on the ITS-90 scale.
seawater pressure [dbar]
longitude of observation (only used if eos="gsw";
see ‘Details’).
latitude of observation (only used if eos="gsw"; see
‘Details’).
equation of state, either "unesco" or "gsw".
Specific heat \(J kg^{-1}\,^\circ C^{-1}\)
If the first argument is a ctd object, then salinity, etc, are
extracted from it, and used for the calculation.
Millero et. al., J. Geophys. Res. 78 (1973), 4499-4507
Millero et. al., UNESCO report 38 (1981), 99-188.
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, swSpice,
swTFreeze, swTSrho,
swThermalConductivity,
swTheta, swViscosity,
swZ
# NOT RUN {
swSpecificHeat(40, T90fromT68(40), 10000, eos="unesco") # 3949.499
# }
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