Ratio of Absolute to Preformed Salinity, minus 1
gsw_Fdelta(p, longitude, latitude)
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar
longitude in decimal degrees, positive to the east of Greenwich. (This
latitude in decimal degrees, positive to the north of the equator. (This
(S/Sstar)-1 [ unitless ]
This R function uses a wrapper to a C function contained within the GSW-C system as updated 2021-12-28 at https://github.com/TEOS-10/GSW-C with git commit '98f0fd40dd9ceb0ba82c9d47ac750e935a7d0459'.
The C function uses data from the
file provided in the GSW-Matlab source code, version 3.06-11.
Unfortunately, this version of the mat file 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 2022-05-25,
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.
p <- c( 10, 50, 125, 250, 600, 1000) latitude <- c( 4, 4, 4, 4, 4, 4) longitude <- c(188, 188, 188, 188, 188, 188) r <- gsw_Fdelta(p, longitude, latitude) stopifnot(all.equal(r/1e-3, c(0.006472309923452, 0.010352848168433, 0.025541937543450, 0.104348729347986, 0.218678084205081, 0.365415366571266)))
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