swTFreeze {oce} | R Documentation |
Compute freezing temperature of seawater.
swTFreeze(salinity, pressure = 0, longitude = NULL, latitude = NULL, saturation_fraction = 1, eos = getOption("oceEOS", default = "gsw"))
salinity |
either salinity [PSU] or a |
pressure |
seawater pressure [dbar] |
longitude |
longitude of observation (only used if |
latitude |
latitude of observation (only used if |
saturation_fraction |
saturation fraction of dissolved air in seawater
(used only if |
eos |
equation of state, either |
In the first form, the argument is a ctd
object, from which the
salinity and pressure values are extracted and used to for the calculation.
Temperature [degC], defined on the ITS-90 scale.
Dan Kelley
[1] Fofonoff, P. and R. C. Millard Jr, 1983. Algorithms for computation of fundamental properties of seawater. Unesco Technical Papers in Marine Science, 44, 53 pp
[2] Gill, A.E., 1982. Atmosphere-ocean Dynamics, Academic Press, New York, 662 pp.
[3] IOC, SCOR, and IAPSO (2010). The international thermodynamic equation of seawater-2010: Calculation and use of thermodynamic properties. Technical Report 56, Intergovernmental Oceanographic Commission, Manuals and Guide.
[4] 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.
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
, swSpecificHeat
,
swSpice
, swTSrho
,
swThermalConductivity
,
swTheta
, swViscosity
,
swZ
swTFreeze(salinity=40, pressure=500, eos="unesco") # -2.588567 degC