R: Seawater specific heat Source=...

swSpecificHeat {oce} | R Documentation

## 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 (degC), 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"`.

### Details

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

### Value

Specific heat J/(kg degC)

### Author(s)

Dan Kelley

### 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

[Package oce version 1.2-0 Index]