gsw_Fdelta {gsw} | R Documentation |
Ratio of Absolute to Preformed Salinity, minus 1
gsw_Fdelta(p, longitude, latitude)
p |
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar |
longitude |
longitude in decimal degrees, positive to the east of Greenwich. (This
is called |
latitude |
latitude in decimal degrees, positive to the north of the equator. (This
is called |
The present R function works with a wrapper to a C function contained within the GSW-C system (Version 3.05-4 dated 2017-08-07, available at https://github.com/TEOS-10/GSW-C, as git commit '5b4d959e54031f9e972f3e863f63e67fa4f5bfec'), which stems from the GSW-Fortran system (https://github.com/TEOS-10/GSW-Fortran) which in turn stems from the GSW-Matlab system (https://github.com/TEOS-10/GSW-Matlab). Consult http://www.teos-10.org to learn more about these software systems, their authorships, and the science behind it all.
(S/SStar)-1 [ unitless ]
http://www.teos-10.org/pubs/gsw/html/gsw_Fdelta.html
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) expect_equal(r/1e-3, c(0.006472309923452, 0.010352848168433, 0.025541937543450, 0.104348729347986, 0.218678084205081, 0.365415366571266))