gsw (version 1.2-0)

gsw_adiabatic_lapse_rate_ice: Adiabatic Lapse Rate of Ice

Description

Note that the unit is K/Pa; multiply by 1e4 to get the more useful K/dbar.

Usage

gsw_adiabatic_lapse_rate_ice(t, p)

Value

adiabatic lapse rate (note unconventional unit) [ K/Pa ]

Arguments

t

in-situ temperature (ITS-90) [ degC ]

p

sea pressure [dbar], i.e. absolute pressure [dbar] minus 10.1325 dbar

Implementation Note

This R function uses a wrapper to a C function contained within the GSW-C system as updated 2022-10-11 at https://github.com/TEOS-10/GSW-C with git commit `657216dd4f5ea079b5f0e021a4163e2d26893371`.

The C function uses data from the library/gsw_data_v3_0.mat file provided in the GSW-Matlab source code, version 3.06-11. Unfortunately, this version of the mat file is no longer displayed on the TEOS-10.org website. Therefore, in the interests of making GSW-R be self-contained, a copy was downloaded from http://www.teos-10.org/software/gsw_matlab_v3_06_11.zip on 2022-05-25, the .mat file was stored in the developer/create_data directory of https://github.com/TEOS-10/GSW-R, and then the dataset used in GSW-R was created based on that .mat file.

Please consult http://www.teos-10.org to learn more about the various TEOS-10 software systems.

References

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

Examples

t  <- c(-10.7856, -13.4329, -12.8103, -12.2600, -10.8863, -8.4036)
p <- c(       10,       50,      125,      250,      600,    1000)
lr <- gsw_adiabatic_lapse_rate_ice(t, p)
stopifnot(all.equal(lr*1e7, c(0.218777853913651, 0.216559115188599, 0.216867659957613,
                              0.216988337914416, 0.217182707402780, 0.218100558740840)))