gsw_sigma1 {gsw} | R Documentation |
This uses the 48-term density equation, and returns potential density referenced to a pressure of 1000 dbar, minus 1000 kg/m^3.
gsw_sigma1(SA, CT)
SA |
Absolute Salinity [ g/kg ] |
CT |
Conservative Temperature [ deg C ] |
potential density anomaly [ kg/m^3 ]
http://www.teos-10.org/pubs/gsw/html/gsw_sigma1.html
Use gsw_sigma0
for 0 dbar pressure, gsw_sigma2
for 2000 dbar, gsw_sigma3
for 3000 dbar, or gsw_sigma4
for 4000 dbar.
gsw_sigma1(34.7118, 28.8099) # 25.955891533636986