gsw_ice_fraction_to_freeze_seawater {gsw} | R Documentation |
Ice Fraction to Cool Seawater to Freezing
gsw_ice_fraction_to_freeze_seawater(SA, CT, p, t_Ih)
SA |
Absolute Salinity [ g/kg ] |
CT |
Conservative Temperature [ degC ] |
p |
sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar |
t_Ih |
initial temperature of ice [ degC ] |
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.
a list containing SA_freeze
, CT_freeze
and w_Ih
.
http://www.teos-10.org/pubs/gsw/html/gsw_ice_fraction_to_freeze_seawater.html
SA <- c( 34.7118, 34.8915, 35.0256, 34.8472, 34.7366, 34.7324) CT <- c( 28.7856, 28.4329, 22.8103, 10.2600, 6.8863, 4.4036) p <- c( 10, 50, 125, 250, 600, 1000) t_Ih <- c(-10.7856, -13.4329, -12.8103, -12.2600, -10.8863, -8.4036) r <- gsw_ice_fraction_to_freeze_seawater(SA, CT, p, t_Ih) expect_equal(r$SA_freeze, c(25.823952352620722, 26.120495895535438, 27.460572941868072, 30.629978769577168, 31.458222332943784, 32.121170316796444)) expect_equal(r$CT_freeze, c(-1.389936216242376, -1.437013334134283, -1.569815847128818, -1.846419165657020, -2.166786673735941, -2.522730879078756)) expect_equal(r$w_Ih, c(0.256046867272203, 0.251379393389925, 0.215985652155336, 0.121020375537284, 0.094378196687535, 0.075181377710828))