gsw_adiabatic_lapse_rate_ice: Adiabatic Lapse Rate of Ice

View source: R/gsw.R

gsw_adiabatic_lapse_rate_iceR Documentation

Adiabatic Lapse Rate of Ice


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


gsw_adiabatic_lapse_rate_ice(t, p)



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


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


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

Implementation Note

This R function uses a wrapper to a C function contained within the GSW-C system as updated 2021-12-28 at with git commit '98f0fd40dd9ceb0ba82c9d47ac750e935a7d0459'.

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 website. Therefore, in the interests of making GSW-R be self-contained, a copy was downloaded from on 2022-05-25, the .mat file was stored in the developer/create_data directory of, and then the dataset used in GSW-R was created based on that .mat file.

Please consult to learn more about the various TEOS-10 software systems.



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)))

gsw documentation built on Oct. 16, 2022, 5:06 p.m.