R: Ratios of SA, CT and p changes when Frazil Ice Forms

gsw_frazil_ratios_adiabatic {gsw} | R Documentation

## Ratios of SA, CT and p changes when Frazil Ice Forms

### Description

Ratios of changes in `SA`, `CT` and `p` that occur when frazil ice forms due to changes in pressure upon the mixture of seawater and ice.

### Usage

    gsw_frazil_ratios_adiabatic(SA, p, w_Ih)

### Arguments

`SA` | Absolute Salinity [ g/kg ]
`p` | sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar
`w_Ih` | initial mass fraction (ice) / (water + ice)

### Details

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.

### Value

a list containing `dSA_dCT_frazil`, `dSA_dP_frazil` and `dCT_dP_frazil`.

### References

http://www.teos-10.org/pubs/gsw/html/gsw_frazil_ratios_adiabatic.html

### Examples

    SA <- c(  34.7118,   34.8915,   35.0256,   34.8472,   34.7366,   34.7324)
    p <- c(        10,        50,       125,       250,       600,      1000)
    w_Ih <- c(    0.9,      0.84,       0.4,      0.25,      0.05,      0.01)
    r <- gsw_frazil_ratios_adiabatic(SA, p, w_Ih)
    expect_equal(r$dSA_dCT_frazil, c(3.035152370800401, 1.932548405396193, 0.613212115809003,
                                   0.516103092738565, 0.436656742034200, 0.425827266533876))
    expect_equal(r$dSA_dP_frazil/1e-6, c(-0.197406834470366, -0.133213926580032, -0.045580136143659,
                                  -0.038806356507548, -0.033541272953744, -0.033350141194082))
    expect_equal(r$dCT_dP_frazil/1e-7, c(-0.650401727338347, -0.689317412221414, -0.743301297684333,
                                       -0.751910946738026, -0.768138213038669, -0.783184728059898))

[Package gsw version 1.0-5 Index]