Seawater Specific Heat

Compute specific heat of seawater.

Usage

swSpecificHeat(
  salinity,
  temperature = NULL,
  pressure = 0,
  longitude = NULL,
  latitude = NULL,
  eos = getOption("oceEOS", default = "gsw")
)

Arguments

salinity: 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).
temperature: in-situ temperature (\(^\circ\)C), defined on the ITS-90 scale.
pressure: seawater pressure (dbar)
longitude: longitude of observation (only used if eos="gsw"; see “Details”).
latitude: latitude of observation (only used if eos="gsw"; see “Details”).
eos: equation of state, either "unesco" or "gsw".

Value

Specific heat (J/kg/degC).

Details

If the first argument is a ctd object, then salinity, etc, are extracted from it, and used for the calculation.

References

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(), computableWaterProperties(), locationForGsw(), swAbsoluteSalinity(), swAlpha(), swAlphaOverBeta(), swBeta(), swCSTp(), swConservativeTemperature(), swDepth(), swDynamicHeight(), swLapseRate(), swN2(), swPressure(), swRho(), swRrho(), swSCTp(), swSR(), swSTrho(), swSigma(), swSigma0(), swSigma1(), swSigma2(), swSigma3(), swSigma4(), swSigmaT(), swSigmaTheta(), swSoundAbsorption(), swSoundSpeed(), swSpice(), swSpiciness0(), swSpiciness1(), swSpiciness2(), swSstar(), swTFreeze(), swTSrho(), swThermalConductivity(), swTheta(), swViscosity(), swZ()

Author

Dan Kelley

Examples

swSpecificHeat(40, T90fromT68(40), 10000, eos = "unesco") # 3949.499
#> [1] 3849.499