gsw_adiabatic_lapse_rate_from_CT: Adiabatic Lapse Rate

View source: R/gsw.R

gsw_adiabatic_lapse_rate_from_CTR Documentation

Adiabatic Lapse Rate


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


gsw_adiabatic_lapse_rate_from_CT(SA, CT, p)



Absolute Salinity [ g/kg ]


Conservative Temperature [ 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.



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)
lr <- gsw_adiabatic_lapse_rate_from_CT(SA, CT, p)
    c(0.240199646230069, 0.238457486976761, 0.203635157319712,
      0.119829566859790, 0.100052760967308, 0.087773070307283)))

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