oce (version 1.4-0)

swSpecificHeat: Seawater specific heat Source= http://sam.ucsd.edu/sio210/propseawater/ppsw_fortran/ppsw.f check value: cpsw = 3849.500 j/(kg deg. c) for s = 40 (ipss-78),

Description

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 \(J kg^{-1}\,^\circ C^{-1}\)

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.

See Also

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()

Examples

# NOT RUN {
swSpecificHeat(40, T90fromT68(40), 10000, eos="unesco") # 3949.499

# }