seacarb (version 2.0.6)

carb: Parameters of the seawater carbonate system

Description

Returns parameters of the seawater carbonate system.

Usage

carb(flag, var1, var2, S=35, T=25, P=0, Pt=0, Sit=0)

Arguments

flag

select the couple of variables available. The flags which can be used are: flag = 1 pH and CO2 given flag = 2 CO2 and HCO3 given flag = 3 CO2 and CO3 given flag = 4 CO2 and ALK given flag = 5 CO2 and DIC given f

var1

enter value of the first variable in mol/kg, except for pH and for pCO2 in $\mu$atm

var2

enter value of the second variable in mol/kg, except for pH

S

Salinity

T

Temperature in degrees Celsius

P

Hydrostatic pressure in bar (surface = 0)

Pt

Concentration of total phosphate in mol/kg

Sit

Concentration of total silicate in mol/kg

Value

• The function returns a data frame containing the following columns:
• S
  Salinity
• T
  Temperature in degrees Celsius
• P
  Pressure in bar
• pH
  pH
• CO2
  CO2 concentration (mol/kg)
• pCO2
  pCO2, CO2 partial pressure ($\mu$atm)
• fCO2
  fCO2, CO2 fugacity ($\mu$atm)
• HCO3
  HCO3 concentration (mol/kg)
• CO3
  CO3 concentration (mol/kg)
• DIC
  DIC concentration (mol/kg)
• ALK
  ALK, total alkalinity (mol/kg)
• OmegaAragonite
  Omega aragonite, aragonite saturation state
• OmegaCalcite
  Omega calcite, calcite saturation state

encoding

latin1

Details

Note that the arguments can be given as a unique number or as vectors. If the lengths of the vectors are different, the longer vector is retained and only the first value of the other vectors is used. It can therefore be critical to use vectors of the same length. For instance, to compute parameters from one couple of variable for a range of temperatures, a vector with temperatures required can be given in enter and other arguments can be completed be one variable this variable will be used for each temperatures.

References

Dickson A. G., Sabine C. L. and Christian J. R., 2007 Guide to best practices for ocean CO2 measurements. PICES Special Publication 3, 1-191. Zeebe, R. E. and Wolf-Gladrow, D. A., 2001 CO2 in seawater: equilibrium, kinetics, isotopes. Amsterdam: Elsevier, 346 pp.

Examples

## With a couple of variables
carb(flag=8, var1=8.2, var2=0.00234, S=35, T=25, P=0, Pt=0, Sit=0)

## Using vectors as arguments
flag <- c(8, 2, 8)
var1 <- c(8.2, 7.477544e-06, 8.2)
var2 <- c(0.002343955, 0.001649802, 2400e-6)
S <- c(35, 35, 30)
T <- c(25, 25, 30)
P <- c(0, 0, 0)
Pt <- c(0, 0, 0)
Sit <- c(0, 0, 0)
carb(flag=flag, var1=var1, var2=var2, S=S, T=T, P=P, Pt=Pt, Sit=Sit)

## Test with all flags 
flag <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 21, 22, 23, 24, 25)
var1 <- c(8.200000, 7.477544e-06, 7.477544e-06, 7.477544e-06, 7.477544e-06, 8.2, 
8.2, 8.2, 8.2, 0.001685024, 0.001685024, 0.001685024,  0.0002888382, 0.0002888382, 
0.002391252, 264.2008, 264.2008, 264.2008, 264.2008, 264.2008)
var2 <- c(7.477544e-06, 0.001685024, 0.0002888382, 0.002391252, 0.001981340, 
0.001685024, 0.0002888382, 0.002391252, 0.001981340, 0.0002888382, 0.002391252, 
0.001981340,  0.002391252, 0.001981340, 0.001981340, 8.2, 0.001685024, 0.0002888382, 
0.002391252, 0.001981340)
carb(flag=flag, var1=var1, var2=var2)

## Test using a data frame 
data(seacarb_test)
tab <- seacarb_test

## method 1 using the column numbers
carb(flag=tab[[1]], var1=tab[[2]], var2=tab[[3]], S=tab[[4]], T=tab[[5]], P=tab[[6]], 
Sit=tab[[7]], Pt=tab[[8]])

## method 2 using the column names
carb(flag=tab$flag, var1=tab$var1, var2=tab$var2, S=tab$S, T=tab$T, P=tab$P, Sit=tab$Sit, 
Pt=tab$Pt)