gsw_entropy_from_t {gsw} | R Documentation |
Calculates specific entropy in terms of Absolute Salinity, in-situ temperature and pressure.
gsw_entropy_from_t(SA, t, p)
SA |
Absolute Salinity [ g/kg ] |
t |
in-situ temperature (ITS-90) [ degC ] |
p |
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar |
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.
specific entropy [ J/(kg*K) ]
http://www.teos-10.org/pubs/gsw/html/gsw_entropy_from_t.html
Other things related to entropy: gsw_CT_from_entropy
,
gsw_entropy_first_derivatives
,
gsw_entropy_from_pt
,
gsw_entropy_ice
,
gsw_pt_from_entropy
SA <- c(34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324) t <- c( 28.7856, 28.4329, 22.8103, 10.2600, 6.8863, 4.4036) p <- c( 10, 50, 125, 250, 600, 1000) e <- gsw_entropy_from_t(SA, t, p) expect_equal(e/1e2, c(4.003894252787245, 3.954381784340642, 3.198664981986740, 1.467908815899072, 0.986473408657975, 0.627915087346090))