R: Seawater absolute salinity, in GSW formulation

swAbsoluteSalinity {oce} | R Documentation

## Seawater absolute salinity, in GSW formulation

### Description

Compute seawater absolute salinity, according to the GSW/TEOS-10 formulation.

### Usage

    swAbsoluteSalinity(salinity, pressure = NULL, longitude = 300,
      latitude = 30)

### 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).
`pressure` | pressure in dbar.
`longitude` | longitude of observation.
`latitude` | latitude of observation.

### Details

The absolute salinity is calculated using the GSW function `gsw_SA_from_SP`. Typically, this is a fraction of a unit higher than practical salinity as defined in the UNESCO formulae.

### Value

Absolute Salinity in g/kg.

### Author(s)

Dan Kelley

### References

McDougall, T.J. and P.M. Barker, 2011: Getting started with TEOS-10 and the Gibbs Seawater (GSW) Oceanographic Toolbox, 28pp., SCOR/IAPSO WG127, ISBN 978-0-646-55621-5.

### See Also

The related TEOS-10 quantity “conservative temperature” may be computed with `swConservativeTemperature`. For a ctd object, absolute salinity may also be recovered by indexing as e.g. `ctd[["absoluteSalinity"]]` or `ctd[["SA"]]`.

Other functions that calculate seawater properties: `T68fromT90`, `T90fromT48`, `T90fromT68`, `swAlphaOverBeta`, `swAlpha`, `swBeta`, `swCSTp`, `swConservativeTemperature`, `swDepth`, `swDynamicHeight`, `swLapseRate`, `swN2`, `swPressure`, `swRho`, `swRrho`, `swSCTp`, `swSTrho`, `swSigma0`, `swSigma1`, `swSigma2`, `swSigma3`, `swSigma4`, `swSigmaTheta`, `swSigmaT`, `swSigma`, `swSoundAbsorption`, `swSoundSpeed`, `swSpecificHeat`, `swSpice`, `swTFreeze`, `swTSrho`, `swThermalConductivity`, `swTheta`, `swViscosity`, `swZ`

### Examples

    ## Not run:
    sa <- swAbsoluteSalinity(35.5, 300, 260, 16)
    stopifnot(abs(35.671358392019094 - sa) < 00.000000000000010)

    ## End(Not run)

[Package oce version 0.9-20 Index]