seacarb (version 2.0.2)

pCa: pCa

Description

Calculates the changes in the saturation states of aragonite and calcite resulting from the manipulation of the calcium concentration

Usage

pCa(flag, var1, var2, Ca, S=35, T=20, P=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

flag = 6

var1

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

var2

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

Ca

Calcium concentration in mol/kg

S

Salinity

T

Temperature in degrees Celsius

P

Hydrostatic pressure in bar (surface = 0)

Value

• The function returns a data frame containing the following columns:
• comment
  The initial or final state water
• 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

Examples

pCa(flag=15, var1=2302e-6, var2=2050e-6, Ca=0.01028, S=35, T=20, P=0) # with normal Ca concentration
pCa(flag=15, var1=2302e-6, var2=2050e-6, Ca=0.01028/2, S=35, T=20, P=0) # with 0.5 * Ca concentration