gsw_SA_from_SP {gsw} | R Documentation |
Calculate Absolute Salinity from Practical Salinity, pressure, longitude, and latitude.
gsw_SA_from_SP(SP, p, longitude, latitude)
SP |
Practical Salinity (PSS-78) [ unitless ] |
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 |
If SP is a matrix and if its dimensions correspond to the
lengths of longitude and latitude, then the latter are
converted to analogous matrices with expand.grid
.
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.
Absolute Salinity [ g/kg ]
http://www.teos-10.org/pubs/gsw/html/gsw_SA_from_SP.html
Other things related to salinity: gsw_C_from_SP
,
gsw_SA_from_SP_Baltic
,
gsw_SA_from_Sstar
,
gsw_SP_from_C
,
gsw_SP_from_SA
,
gsw_SP_from_SK
,
gsw_SP_from_SR
,
gsw_SP_from_Sstar
,
gsw_SR_from_SP
,
gsw_Sstar_from_SA
,
gsw_Sstar_from_SP
,
gsw_deltaSA_from_SP
SP <- c(34.5487, 34.7275, 34.8605, 34.6810, 34.5680, 34.5600) p <- c( 10, 50, 125, 250, 600, 1000) lat <- c( 4, 4, 4, 4, 4, 4) long <- c( 188, 188, 188, 188, 188, 188) SA <- gsw_SA_from_SP(SP, p, long, lat) expect_equal(SA, c(34.711778344814114, 34.891522618230098, 35.025544862476920, 34.847229026189588, 34.736628474576051, 34.732363065590846))