eos2teos_geo {seacarb}

Convert temperature and salinity from EOS-80 to TEOS-10

Description

Converts in situ to conservative temperature and practical to absolute salinity (SA). Salinity conversion depends on depth and geographic location.

Usage

eos2teos_geo(SP, T, P=0, long=1.e20, lat=1.e20)

Arguments

SP

Practical salinity on the practical salinity scale

T

In situ temperature in deg. C

P

Sea water pressure in dbar

long

Longitude in decimal degrees [ 0 ... +360 ] or [ -180 ... +180 ]

lat

Latitude in decimal degrees [-90 ... 90]

Details

Conversion from practical to absolute salinity depends on water density anomaly which is correlated with silicate concentration. This function relies on silicate concentration taken from WOA (World Ocean Atlas) to evaluate density anomaly.

Value

The function returns a data frame containing the following columns:

CT

Conservative temperature (deg C)

SA

Absolute salinity (g/kg)

Author(s)

Jean-Marie Epitalon

References

McDougall T. J., Jackett D. R., Millero F. J., Pawlowicz R. and Barker P. M., 2012. A global algorithm for estimating Absolute Salinity. Ocean Science 8, 1123-1134.

Pawlowicz R., 2013. What every oceanographer needs to know about TEOS-10 (The TEOS-10 Primer). http://www.teos-10.org/

See Also

teos2eos_geo does the reverse, eos2teos_chem, sp2sa_geo, package gsw

Examples

   # Calculate conservative temperature and absolute salinity of a sample with 
   # Practical salinity of 35 psu, in situ temperature of 18 deg C,
   # depth is 10 dbar and location is 188 degrees East and 4 degrees North.
   f <- eos2teos_geo(SP=35, T=18, P=10, long=188, lat=4)
   CT <- f$CT     # Conservative temperature
   SA <- f$SA     # Absolute salinity