oce (version 0.9-20)

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 = 300, latitude = 30, 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 [$deg$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.

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

swSpecificHeat(40, T90fromT68(40), 10000, eos="unesco") # 3949.499