Mg/Ca

Functions for converting between foraminiferal Mg/Ca and environmental parameters.

Exponential

The ‘classic’ exponential function, where Mg/Ca depends only on temperature, following:

\[Mg/Ca_{foram} = A\ e^{Temp\ B}\]

Functions

Converter:
  • foramgeochem.mgca.exponential
Transfer functions:
  • exp_mgca_2_temp()
  • exp_temp_2_mgca()

Holland et al (sub.)

The multi-factor formulation of Holland et al (sub.), which accounts for the influence of Temperature, Mg/CaSW, [Ca]SW and a species-specific carbon-system parameter (carb, i.e. DICSW, [CO3]SW or pH).

\[Mg/Ca_{foram} = Mg/Ca_{SW}\ ^A\ DIC_{SW}\ ^B\ e^{(C\ [Ca]_{SW} + D T + E)}\]

Functions

Converter:
  • foramgeochem.mgca.holland_2020
Transfer functions:
  • holland2018_calc_mgca()
  • holland2018_calc_temp()
  • holland2018_calc_mgca_sw()
  • holland2018_calc_Ca_sw()
  • holland2018_calc_carb_sw()