teos2eos_geo {seacarb}

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

Description

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

Usage

teos2eos_geo(SA, CT, P=0, long=1.e20, lat=1.e20)

Arguments

SA

Absolute salinity in g/kg

CT

Conservative temperature in degrees 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 absolute to practical 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 the density anomaly.

Value

The function returns a data frame containing the following columns:

T

In situ temperature (deg C)

SP

Practical salinity (psu)

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., Wright D. G. and Millero F. J., 2011. The effects of biogeochemical processes on oceanic conductivity/salinity/density relationships and the characterization of real seawater. Ocean Science 7, 363-387.

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

See Also

eos2teos_geo does the reverse, teos2eos_chem, sa2sp_geo, package gsw

Examples

   # Calculate in situ temperature and practical salinity of a sample with 
   # Absolute salinity of 35 g/kg, conservative temperature of 18 deg C,
   # depth is 10 dbar and location is 188 degrees East and 4 degrees North.
   f <- teos2eos_geo(SA=35, CT=18, P=10, long=188, lat=4)
   T <- f$T     # in situ temperature
   SP <- f$SP     # Practical salinity