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 practial 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

If the first argument is an oce object, then values for salinity, etc., are extracted from it, and used for the calculation, and the corresponding arguments to the present function are ignored.

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"]].

Examples

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

## End(Not run)

[Package oce version 0.9-18 Index]