gsw_CT_freezing_poly: Conservative Temperature Freezing Point (Polynomial version)

Description Usage Arguments Value Implementation Note References Examples

View source: R/gsw.R

Description

Conservative Temperature Freezing Point (Polynomial version)

Usage

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gsw_CT_freezing_poly(SA, p, saturation_fraction = 1)

Arguments

SA

Absolute Salinity [ g/kg ]

p

sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

saturation_fraction

saturation fraction of dissolved air in seawater

Value

Conservative Temperature at freezing of seawater [ degC ].

Implementation Note

This R function uses a wrapper to a C function contained within the GSW-C system as updated 2021-03-27 at https://github.com/TEOS-10/GSW-C with git commit 'f7bfebf44f686034636facb09852f1d5760c27f5'. In turn, that C function uses data from the library/gsw_data_v3_0.mat file provided in the GSW-Matlab source code, version 3.06-11. Unfortunately, this version is no longer displayed on the TEOS-10.org website. Therefore, in the interests of making GSW-R be self-contained, a copy was downloaded from http://www.teos-10.org/software/gsw_matlab_v3_06_11.zip on 2021-0706, the .mat file was stored in the developer/create_data directory of https://github.com/TEOS-10/GSW-R, and then the dataset used in GSW-R was created based on that .mat file. Please consult http://www.teos-10.org to learn more about the various TEOS-10 software systems.

References

http://www.teos-10.org/pubs/gsw/html/gsw_CT_freezing_poly.html

Examples

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SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324)
p <-  c(     10,      50,     125,     250,     600,    1000)
saturation_fraction <- 1
CT_freezing <- gsw_CT_freezing(SA, p, saturation_fraction)
stopifnot(all.equal(CT_freezing, c(-1.899683776424096, -1.940791867869104, -2.006240664432488,
                                   -2.092357761318778, -2.359300831770506, -2.677162675412748)))

gsw documentation built on July 8, 2021, 1:07 a.m.